Abstract：Advanced Driving Assistant System(ADAS) are important to increase driving safety. Nowadays, the Open Computing Language(OpenCL) framework and mobile devices integrated with Graphics Processing Unit(GPU) has made it possible to launch ADAS applications on mobile devices efficiently. In this paper, a typical ADAS lane detection application based on OpenCL framework is implemented and launched on three mobile devices. By evaluating the accuracy, processing frame speed and energy efficiency of this application, it's concluded that the mobile devices are suitable for ADAS applications.

Abstract：A robust lane detection algorithm is presented for ADAS applications. Utilizing a distance based image multiscale resampling method, horizontal dark-bright-dark feature, parabola lane model and Kalman filter based tracking, the algorithm extracts and tracks road lane in realtime. A fast pitch angle alignment method is put forward for realtime detection on Android mobile devices. Experiments show that the algorithm runs realtime on an Android car dashcam.

Abstract：Aiming at the simplification of the driver′s state detection, feature extraction, and the high cost of detecting equipment, the implementation of driver′s state detection based on multiple feature fusion isproposed. The system adopts STM32L4 DSP chip as the core control. Firstly, characteristics such as pulse, acceleration, angular velocity, attitude angle and human body temperature are acquired and processed by SON1303, MPU6050. Secondly, for pulse, DSP library is called to implement FFT and Chebyshev filter is used to extract the frequency spectrum. Finally, a method via analyzing the frequency spectrum of the driver′s state, tiredness, distraction and tension , defining the first main peak B and spectral ratio K, and fusing these characteristics as B, K, attitude angle, acceleration and angular velocity can judge driver′s states effectively. Experiments show that the system has the characteristics of strong anti-interference, low cost, etc. It can be widely used in the state detecting of divers, and it can promote the popularization of ADAS.

Abstract：Real-time lane detection and tracing is achieved on TMS320DM6437 platform. Lane detection is achieved with the method of two-stage Hough transform, and the correlation of frams is used to trace lane. After the algorithm is transplanted, the algorithm will be optimized further based on the character of DSP. Experimental results show that the system achieved real-time lane detection and tracing and it has some noise immunity.

Abstract：Lane level traffic violation refers to the behavior of the moving target violates the traffic laws whose relative position moves within one lane level relative to the ground lane or other moving targets. Due to the inadequate data accuracy, this kind of behavior has always been a difficulty for traffic management law enforcement and evidence collection. The realization of high precision BDS/GPS positioning relies on wide area real-time precision positioning technology. The satellite positioning accuracy has improved from an average of about 4-20 meters to a public level of sub-meter through the national/global BDS ground-based augmentation system. From the point of view of high precision positioning technology, we have designed a terminal with lane level positioning ability for law enforcement and evidence collection in this paper, and we have carried out technical validation in Wuxi and other places. The experiments showed that these technologies could provide support for the IOV system such as vehicle behavior analysis and vehicle active safety.

Abstract：The study set up a platform for gathering CAN data from the vehicles independently. The system proposed 3 accessing index for drivers’ comprehensive quality based on driving safety mainly, supplemented by riding comfortably and fuel consumption of vehicles, which reflects the driving safety to a large extent.The model analyze these index from 7 factors the entropy of steering wheel angle, the entropy of vehicle speed,steering angle rate and so on. Firstly, the analytic hierarchy process(AHP) was used to establish a single factor weight vector. Then the single factor fuzzy judgment matrix was calculated by membership function. Finally, we got the result of the driver′s comprehensive quality using maximum membership. The practice show that this model provides a simple and accurate data analysis method for driving safety.

Abstract：Bluetooth Low Energy(BLE) technology is widely used in the field of Internet of things(IOTs) because of its low energy characteristics. However, the point-to-point data transmission protocol, small transmission rang, and the network capacity restrictions make the application of the BLE to Internet of things greatly limited. Thus, Mesh networking technology is particularly important. The Mesh technology for BLE will make the Bluetooth device/Node to extend the range of information transmission. In this paper, we first introduce the characteristics of Mesh networks and node data control of BLE Mesh, then analyze the shortcomings of BLE Mesh technology from the aspects of routing algorithm, the limitation of advertising channels and sleep mode, and finally the outlook for BLE Mesh network is discussed.

Abstract：As the unique advantages of substrate integrated waveguide(SIW), such as low profile, ease of fabrication, and compatibility with planar integration, it is widely used in antennas. The main directions of the development of modern antennas are multi-mode and wideband, reconfigurable and multiple input multiple output(MIMO). The implementation methods and prospects of SIW multi-mode wideband antennas are presented. All of these can provide the basis for the design of SIW multi-mode wideband antennas.

Abstract：NAND Flash memory has been applied as the storage media in Solid State Drive(SSD). It has some unique features, for example, it needs Flash Memory Translation Layer(FTL) to manage the storage space for high read & write performance, liability and life-time guarantee. Traditional algorithms are but not the best solutions for today’s NAND flash memory while the page size and block size have grown up quickly in the past years. Those page size based algorithms were proven not good performance in random data access, which measured in 4 KB byte data throughput(called as “IOPS”, in/out per second). The paper proposed a 4 KB size mapping FTL algorithm. This algorithm was verified on a SSD controller, a real silicon chip manufactured by 110 nm process. The chip had SATA-II interface with 3 Gb/s data transfer rate and five Flash memory accessing buses to drive up to five Flash memory channels in parallel. The algorithm supported by the chip's internal resources passed the reliability test and presented the expected read & write speed.

Abstract：Coarse-grained reconfigurable block encryption array(RBEA) is the accelerative platform for a great variety of block cipher algorithms twhich provides massively parallel hardware resources. In this paper, SM4 is mapped on this platform with the goal of improving the performance and resource efficiency. Based on the direct mapping scheme, three promotional implementations are proposed with the method of operation merging and task paralleling. Experimental results show that the modified schemes can develop the advantage of array to varying degrees and throughput and resource usage efficiency is improved greatly.

Abstract：By studying the SHA-3 algorithm and Look-Up-Table(LUT) method, a high speed and low hardware cost circuit scheme has been proposed. Firstly, the state machine is used to implement the round operation, which is the core replacement function of SHA-3 algorithm. The data exchange and data storage of each round operation are processed by LUT method. Then, the hardware module parallel processing and storage unit sharing techniques are used to improve operation frequency and to reduce the hardware cost. Finally, the SHA-3 algorithm is designed using SMIC 65 nm CMOS process. DC synthesis shows that the area of circuit is 65 833 μm2. The maximum operating frequency is 150 MHz and power consumption is 2.5 mW at 1.2 V.

Abstract：Aiming at the FPGA cloning technology, it is pointed out that the key problem is attacking the encryption key. Attack function selection method against AES-256 CBC mode decryption is discussed with Xilinx 7 series FPGA as the column. 256 bit key was successfully recovered by performing a differential power attack with a single-bit power model. Meanwhile, in order to solve the problem that the key cannot be directly substituted into the correctness of the key test, a test method based on the polarity of the DPA attack correlation coefficient is designed, to avoid the misconfiguration caused by error key. Experimental results show that the method can effectively eliminate the "false peak" phenomenon.

Abstract：Based on the 0.18 μm BiCMOS process, a 10 Gb/s transimpendence amplifier is designed. In order to solve the influence of temperature variation on the performance of amplifier, the current associated with the change of temperature is introduced(temperature current), thereby the temperature current is locked into the temperature voltage to power the transimpedance amplifier, which makes the gain flat in the band and the bandwidth change reduced. In order to extend the dynamic range of the input signal, the variable MOS resistor is introduced to realize the Auto Gain Control(AGC) function, so that the amplifier can operate at a large input power. In order to improve the gain, two differential amplifier circuits are introduced, and adopts the method of capacitance degeneration to further extend the bandwidth. Post layout simulation results show that the amplifier differential transimpedance gain is 9 kΩ, -3 dB bandwidth is 8.7 GHz, the equivalent input noise current is 17 pA/√Hz, the sensitivity is -20 dBm, the input saturation photocurrent is 2 mApp, the power consumption is 66 mW and the power supply noise suppression ratio is -16 dB. The area of overall amplifier circuit layout occupies 937 mm×828 mm, yet the core amplifier area is 94 mm×63 mm. Therefore, the designed transimpendence amplifier fully meets the requirements of the business applications.

Abstract：Based on TSMC 0.18 μm CMOS process，an 10 bit 200 MS/s DAC（digital to analog converter）was designed. In order to improve the whole performance of the DAC, circuit mainly using segmented current steering architecture, where the upper 6 bits were thermometer codes, and the lower 4 bits were binary codes. A cascode and differential output structure was adopted in the current source and switching unit. In order to improve the dynamic performance of the DAC, a low cross-point switch drive circuit was used in this paper. Operating at 1.8 V power supply，simulation result showed that the DAC had an INL and DNL of 0.05 LSB and 0.2 LSB respectively and SFDR up to 81.53 dB for 0.976 MHz output signal frequency.

Abstract：A system of smart seeing glasses based on machine vision was proposed and designed in this work. Using Samsung Cortex-A8 architecture S5PV210 as the central processor, running on the Linux system, equipping six core modules of binocular acquisition, GPS, voice broadcast, GSM SMS, voice calls and wireless transmission were equipped to build smart seeing glasses systems hardware platform. Then after completing the target scene identification on a remote cloud server through deep learning algorithm, at last, the accurate voice guide for the blind walking in real time was implemented actually. The system test results show that the smart glasses system is not only able to make the right travel guide for the blind, it also has a certain ability to identify simple objects, which can help the blind make a simple items classification. In addition, this system also has GPS positioning, voice calls, GSM SMS and many other auxiliary functions.

Abstract：Aimed at the shortcomings of accuracy and poor automation of the external counterpulsation inflation/deflation timing, an automatic optimization method of the external counterpulsation device inflation/deflation timing is presented. The temporal pulse wave acquisition and processing circuit is designed, and according to the temporal pulse acquisition in counterpulsation before and after the feature points, the search method of the temporal pulse potter character point is designed. According to the features of search points, the design of external counterpulsation device inflation/deflation timing automatic adjustment algorithm realizes the automatic adjustment of the external counterpulsation device inflation/deflation timing and optimal counterpulsation effect,which greatly improves the automatic, safety and effectiveness of the device，and has a good reference value and application prospects.

Abstract：According to actual requirements in the minimally invasive surgery, and taking the advantage of DSP in digital signal processing and the flexibility of CPLD in constructing logic functions, this paper designed and implemented the hardware system based on DSP and CPLD platform. And the research object is based on clamping endoscopic mechanical arm. The CPLD module generates PWM waveform that controlling the mechanical arm motor, and corresponding signal optimization. And the CPLD module includes encoder signal acquisition module，motor brake control and limit switches protection module. The data transmission of DSP and CPLD is realized by accessing external register. Finally, the speed control and the position control of the clamping endoscopic mechanical arm is realized, and its controller meets the real-time and stability requirements of the motion control.

Abstract：A type of 3D printer for colored three-dimensional models is designed in this paper. Compared with traditional FDM desktop 3D printers which could only make monochromatic models, this newly designed 3D printer can mix the printed materials on the basis of redesigning the mechanical structure and electric control system of open-source 3D printers. In addition, Bresenham's line algorithm and Gcode directions have also been adopted to design a control system for colored printers. The experiment results show that this type of 3D printers can make 3D models in various colors and increase the print speed compared with previous monochrome 3D printers of the same type.

Abstract：In view of the characteristics of marine navigation radar simulation training, the control panel, which can control radar simulator software, is designed. This panel can complete in most types of marine radar training, with good, easy portable, and can provide near real operation experience. The design of the hardware circuit is simple and practical. SCM, which uses its strong control ability, combined with button, potentiometer, and gate and USB serial port circuit, processes analog signals into the binary code, which the computer can identify, and directly control the various functional display of the computer simulator software. The software design is flexible and easy to update. According to the different radar model, the function of various keys and potentiometer can be reset from the software. The compiled software can be downloaded directly to the SCM through the USB serial port.

Abstract：In recent year, with the constantly improvement of electric information acquisition system, the mining of power information big data is stepping deeper. Site inspection is one of the most important way of accessing electric energy meter running state. Site inspection data, which has wide coverage and highly cyclical, can accurately reflect the error of electric energy meter, user load, operating environment etc, and therefore it is necessary to bring electric energy meter site inspection data to source of mining of power information big data. This paper briefly discusses the strategies of mining of power information big data of electric energy meter site inspection. It is helpful to analysis the electric energy meter running state and user′s power consuming behavior. Therefore, it makes the most of site inspection in electric energy meter operations and management.

Abstract：Cable force of bridge cable is an important index to measure the safety of bridge. A wireless cable force measure system based 6LoWPAN and MEMS was proposed. First, this paper introduced the overall structure of the system and the principle of cable force measurement by the method of vibration spectrum, and then it designed the cable force measure system. Finally the precision vibration test bench and real engineering cable test was developed. Experiments show that the distributed wireless sensor system based on MEMS and 6LoWPAN can accurately carry out remote cable force detection. It provides an effective method for bridge safety monitoring.

Abstract：In order to meet the demand of the transmission line inspection, and improve the efficiency, safety and automation of inspection, this paper puts forward a method of Unmanned Air Vehicle(UAV) independent inspection on transmission line based on the camera. UAV uses STM32F407 as the main control chip in this system, with a black-and-white camera collecting the gray image information of the transmission line and the background, followed by Iteration threshold of binary image, median filtering and transmission line extraction, and planning route of UAV inspection. In addition, the UAV is also equipped with 433 MHz wireless communication module, the user can control from a distance through the wireless handle. Simulation experiments show that，this method can effectively achieve UAV autonomous inspection, providing a good platform for UAV inspection equipped with equipment, such as embedded visible-light image acquisition device and UV imaging detector.

Abstract：Aiming to the practice demand of the indoor location service, a positioning algorithm with Pedestrian Dead Reckoning(PDR) that suits for collecting data by cellphone terminal is presented. Different from the traditional data collection, taking the original data by cellphone, then the acceleration signal is utilized to realize stride detection and step length estimation. Extended Kalman Filter(EKF) is used to fuse datas from inertial sensors to improve the calculating accuracy of heading direction. Finally, data acquisition software based on Android platform is successfully designed which utilize sensors built-in cellphone implementing data acquisition. By the analysis of experimental data, the positioning accuracy is better than 2 m, and the algorithm can successfully achieve the indoor positioning under the requirement of higher precision and lower implementing complexity.

Abstract：Under the influence of bad environment, the gear characteristic information is difficult to be extracted effectively. A gear fault diagnosis method based on adaptive stochastic resonance(ASR) denoising and improved local mean decomposition(LMD) is proposed. The particle swarm optimization(PSO) algorithm is used to optimize the parameters of the stochastic resonance. The best stochastic resonance output is obtained and the weak fault information is extracted. Then, the fault characteristic frequency signal noise ratio(SNR)is used to improve LMD and remove the false components. The fuzzy entropy feature is extracted and the gear types are diagnosed and identified. The research shows that the method can identify gear types effectively and it is an effective method for gear fault diagnosis.

Abstract：A cascaded Linear Kalman Filter (LKF) algorithm is designed based on fuzzy-rule. The state equations are set up by partial elements of the rotation matrix. Firstly, the measurement acceleration is compensated by motion acceleration, the covariance matrix is adjusted by the fuzzy rules in the different motion states to reduce the interference of acceleration, the horizontal attitude angles are obtained. Then the indirect observations are obtained by the magnetic and attitude information, the yaw is obtained. Dynamic and static tests show that this method can eliminate the accumulated error and reduce the influence of the magnetic interference on the horizontal angles. Compared with the Extended Kalman Filter, this method can improve the accuracy of attitude estimation and ease the computation.

Abstract：For the nonlinear, transient and impact properties of the automaton vibration response signal, a automaton fault diagnosis method is proposed based on Ensemble Empirical Mode Decomposition(EEMD) and fractal matrix. Firstly, various conditions automaton signal is dealt with EEMD decomposition. By calculating the generalized fractal dimension of the Intrinsic Mode Function(IMF) component signal, the generalized dimension fractal matrix of each condition is obtained, and it′s found that under different conditions, the fractal matrix is a great difference. By calculating the correlation coefficient between the signal to be detected and the sample signal, the line graph is used to be directly compared to determine the fault types of the signal to be detected. So it proves the validity of this method for automaton fault diagnosis.

Abstract：Power private wireless network on 230 MHz is an important part of the power load management system, however, along with the expanding of service range and the increasing of service volume, its shortcomings of low transmission rate and low spectrum efficiency stand out. Spectrum detection mechanism can effectively find out the idle spectra, while the software defined radio can fully make use of the detected spectrum holes and thus raise the spectrum efficiency. Accordingly, the paper proposes an implementation applying spectrum detection based software defined radio technology into the power private wireless networks. Take the 230 MHz private spectrum of power system for example, the digital circuit of the transceiver in the communication system in accordance with its spectrum characteristics is designed, and performance on spectrum detection is tested and verified through MATLAB at last.

Abstract：In order to improve the security of data communication in mobile ad hoc network, a random key construction strategy is proposed. First, it builds a routing information table for each node, to record information of routing flag, part route and complete route. Then, it executes information coordination according to routing flag, making the two nodes sharing a complete route. Finally, it generates random keys by binary bits sequence of the shared complete routes, and calculates upper and lower bounds of bit number according to minimum entropy. Simulation results show that, compared with common ARAN and TARF secure routing protocols, the routing protocol by applying the new strategy to DSR has higher packet delivery rate under the condition of different proportion of malicious nodes.

Abstract：To further analyze the effect of cascading failures of interdependent network, different interdependent networks are built by three coupling preferences: random coupling, assortative coupling and disassortative coupling, coupling edges of which are logical dependency. A new cascading failure model considering global load distribution is proposed, which assess the consequence of cascading failure from the maximum connected subgraph, iterative step and the distribution of overload nodes. Simulation results show：(1)Assortative interdependent network has a smaller proportion of the largest connected subgraph than other interdependent networks, and the non-largest connected subgraph of assortative interdependent network distincts from other interdependent networks；(2)With the increaseing of tolerance coefficient, the falling speed of iteration step of assortative interdependent network is slowliest, and different interdependent networks achieve the peak of iteration step when tolerance coefficient is equal to 0.1；(3)In the first iteration of the cascading failure, the failed nodes of different interdependent networks tend to select neighboring nodes of neighboring nodes of initial failed node, rather than neighbor nodes of the failed node.

Abstract：Collision avoidance is extremely important for UAV flight. When the UAV does not have accurate position information, and especially the UAV global positioning system(GPS) signal failures, collision avoidance must be proposed to control the UAV’s flight. This paper presents analysis of collision detection, based on collision probability calculated from distance measurement, given the received radio frequency signal strength, and proposes orthogonal rules to modify the UAVs’ predefined flight routes for collision avoidance. Theoretical analysis and experimental results demonstrate the validity of the collision avoidance strategy to provide safe flight routes for UAVs.

Abstract：Filter bank based multicarrier(FBMC) modulation system is characterized by a single prototype filter which determines the overall performance, including the frequency selectivity, intersymbol interference(ISI), and interchannel interference(ICI). An efficient design algorithm is proposed to design the prototype filter for nearly perfect reconstruction (NPR) FBMC system. The design problem is formulated into an unconstrained optimization problem that minimizes the weighted sum of the ISI/ICI, and stopband energy. By deriving the gradient vector and Hessian matrix of the objective function of the problem, the modified Newton′s method is employed to iteratively optimize the prototype filter, which is updated with closed-form formula at each iteration, implying low computational complexity. Numerical examples and comparison with existing methods are included to demonstrate the improved performance of the proposed algorithm.

Abstract：Power allocation is an important research issue of resource allocation in non-orthogonal multiple access system. Optimal water-filling power allocation algorithm can improve the system performance, but the complexity of the algorithm is relatively high. This paper presents a low complexity power allocation algorithm. Firstly, the algorithm uses water-filling principle to subcarriers in order to get the total multiplexed power. Then the fractional transmission power allocation algorithm is used to reallocate the total multiplexed power for multiplexed users on single subcarrier.The simulation result shows that the proposed algorithm can obviously reduce the computational complexity under the circumstance of the performance loss of less than 3% compared with the optimal water-filling transmission power allocation.

Abstract：In the field of moving object detection, ViBe algorithm has been widely studied and used because of its high real-time performance and good robustness. However, dynamic background will often interfere with the detection results. By measuring the background complex degree to update the distance threshold and the background model updating rate, a algorithm of moving target detection algorithm based on improved ViBe is proposed, which can effectively reduce the influence to detection results in dynamic background. In this paper, the improved ViBe algorithm is applied to the situation of moving camera by using the global motion compensation algorithm， which obtains a certain effect.

Abstract：For solving the problem of performance degradation of pedestrian detection caused by local changes such as occlusion and pose variation, a pedestrian detection method fusing global and local features is proposed. First, it divides human body into six components including global and local parts. Then, it improves the Haar-like descriptor for fast extracting features of local components of human body, and it fuses the histogram of oriented gradients features of global component to build the joint components features of the human body. Finally, it improves the learning method of support vector machines by combined with boost learning idea, to train and classify the joint components features. Experimental results shows that, this method has high accuracy rate and low false alarm rate, and less influenced by occlusion and pose variation.

Abstract：SMT-PAAG is a multi-core processors. Based on SMT_PAAG platforms, using data parallel and task parallelism, the Harris corner detection and matching algorithm are implemented. The algorithms are verified on the SMT-PAAG emulator. Detailed analyses of speed up ratio and performance are performed. The experimental results show that the Harris corner detection and matching algorithm on SMT-PAGG parallel implementation are effective.

Abstract：In order to realize the comprehensive collection and supervision of the express industry information, and combine the practice and requirement of information construction in the China′s public security, adopting the architecture of policing cloud, the design and implementation of the express industry security supervision platform are researched. The platform uses Inspur Loushang 6 frame technology, through the analysis of the demand, design the corresponding function module and database. Then two key technologies of the platform are emphasize，which include the cloud storage for regulatory data and the use of middleware technology to realize the sharing of police geographic data. The express industry security regulatory data can display visually. Furthermore it implements intelligent supervision of express industry.

Abstract：A real-time fire detection algorithm based on image processing which is named sentinel pyramid detection algorithm is proposed to help discover fire in the outdoor scenes. The algorithm adopts a sentinel classification strategy to ensure its accuracy and efficiency. It can execute many times faster than other pixel-by-pixel algorithms based on background difference and frame difference. It is suitable and applicable for a wide range of real-time fire detection and has a good prospect. The algorithm has been successfully applied to Hi3516C video SoC chip and has become an important detection way of straw burning because of high accuracy rate of 94.6%.

Abstract：The scenarios of charging multiple electronic devices simultaneously have been received more attention in wireless research. However, these electronic devices may have different charging requirements, due to the device type, power requirement and charging time. Simultaneous charging can affect wireless charging efficiency. In this paper, considering the scenario of multiple devices in resonant wireless charging, we propose a priority algorithm based on many parameters in order to achieve better charging system efficiency. The parameters involved in the algorithm are: battery capacity, real-time residual battery, real-time charging distance, load, charging priority subjective factor of the user(time or power preference), which have a good coverage of wireless charging process. Compared with the wireless charging with no priority, the simulation results illustrate that the method in this paper has increased about 20%.

Abstract：In order to achieve the balance control of charging in series lithium ion batteries, so as to improve the charging efficiency of lithium battery, a PID lithium battery equalization charging control strategy based on sub optimal solution set disturbance intelligent water drop algorithm(IWD) was proposed. Firstly, the charge equalization circuit for the lithium battery is studied, and the structure diagram of PID charge control with a single equalizer is presented. Secondly, in allusion to the problems of setting of PID parameters, the introduction of intelligent water drops algorithm was used to optimize the parameters, in order to improve the performance of the optimization, the suboptimal solution set and chaos disturbance were used to improve the diversity of evolution of water droplets, which can improve the accuracy and efficiency of evolution. Finally, the effectiveness of the proposed control strategy is verified by MATLAB/Simulink simulation, and the distribution of the voltage curve fitting distribution is more concentrated, and the time is shorter.

Abstract：In three phase controlled rectifier parallel system,there are several reasons will lead to the generation of circulation，such as control and device can not be real-time response, zero sequence switching duty cycle and device parameters are not the same. This paper puts forward a kind of control method, which using unified voltage regulator ,it is to say that outer ring of the parallel modules voltage regulator has been separated，to form a unified common voltage regulator ,through the closed loop current control module in the parallel implementation of the three-phase controlled rectifier current, suppress the circulation. This paper sets up a small signal model in three-phase PWM rectifier system in parallel,analyzes the reasons of three-phase PWM rectifier parallel circulation system, the simulation results show that circulating current of the parallel system has been effectively suppressed, is 0.12 mA, output DC voltage ripple amplitude value decreases, the ripple voltage for 0.2% of the output voltage ,the load mutation is that this kind of control method of parallel circuit can be within 0.08 s fast recovery to the output voltage,and load mutation after 2.8% of DC voltage overshoot,it has good stability.

Abstract：In view of the output power of the photovoltaic cells of micro inverter contains the double frequency power pulsation, a novel power decoupling circuit is proposed, which can reduce the capacity of decoupling capacitors effectively and prolong the life of micro inverter. In this paper, the topological structure and working principle of the micro inverter and the principle of power decoupling is analyzed in detail. The work methods, merits and drawbacks of three kinds of power decoupling circuits are compared. Two operating modes and control strategies of the power decoupling circuit is proposed. Finally, a simulation model of the 230 W with power decoupling circuit is built in the MATLAB simulation software. By means of the simulation experiment, the power decoupling circuit can restrain the power pulsation problem and the control strategy can achieve unity power factor.