Abstract:In field of precise positioning of piezoelectric platform, the accuracy is affected by hysteresis and creep characteristics of piezoelectric actuators, mechanical system error and other factors. To compensate these errors, a control method based on visual sensing was proposed in this paper. Visual sensing has the advantages of high precision, non-contact and intuitive. The application of visual servo in piezoelectric control can eliminate all these error factors. Most of the existing micro displacement control systems based on visual sensing are one or two-dimensional motion control system, and have the disadvantages of slow image processing speed, low positioning accuracy and short stroke. Therefore, a measurement and motion control system based on micro visual sensing was designed by our research group for a three dimensional piezoelectric platform. A high speed camera was used to aquire the defocused image of the microspheres under the microscope at 1000 fps. The position of the platform can be obtained in real time by image processing. Transfer it to the motion control system, the output was calculated through the incremental PID algorithm. Then an accurate, fast and stable closed loop control of the piezoelectric platform was realized. The experimental results showed that the positioning accuracy reach to 15nm in the 100um stroke.

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	1. Piezoelectric platform control method based on micro visual sensing
	Wang Yuliang,Cui Xiaomeng
	Electrics, Communication and Autocontrol Technology 03 March 2017
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	Abstract:In field of precise positioning of piezoelectric platform, the accuracy is affected by hysteresis and creep characteristics of piezoelectric actuators, mechanical system error and other factors. To compensate these errors, a control method based on visual sensing was proposed in this paper. Visual sensing has the advantages of high precision, non-contact and intuitive. The application of visual servo in piezoelectric control can eliminate all these error factors. Most of the existing micro displacement control systems based on visual sensing are one or two-dimensional motion control system, and have the disadvantages of slow image processing speed, low positioning accuracy and short stroke. Therefore, a measurement and motion control system based on micro visual sensing was designed by our research group for a three dimensional piezoelectric platform. A high speed camera was used to aquire the defocused image of the microspheres under the microscope at 1000 fps. The position of the platform can be obtained in real time by image processing. Transfer it to the motion control system, the output was calculated through the incremental PID algorithm. Then an accurate, fast and stable closed loop control of the piezoelectric platform was realized. The experimental results showed that the positioning accuracy reach to 15nm in the 100um stroke.
	TO cite this article:Wang Yuliang,Cui Xiaomeng. Piezoelectric platform control method based on micro visual sensing[OL].[ 3 March 2017] http://en.paper.edu.cn/en_releasepaper/content/4720571


	2. Further Results on Stability Analysisfor Systems with Time-Delay via a Refined Integral Inequality
	ZENG Hong-Bing , HE Yong, WU Min , SHE Jinhua, SHE Jinhua
	Electrics, Communication and Autocontrol Technology 21 January 2017
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	Abstract:The integral inequality technique is an effective method to establishdelay-dependent stability conditions, and a variety of integral inequalities havebeen developed to reduce conservatism of the conditions.Among them, a free-matrix-based integral inequality was devised by introducing some auxiliary functions. It was proved that the stability condition derived using this inequalityis more tighter than others. To reduce computation complexity, this papershows a method to further refine the integral inequality by getting rid of free matrices.The refined integral inequality is used to investigate the stability of time-delay systems,and some less conservative conditions are devised. Numerical examples show that the theoretical boundsand those given by the method are almost the same.
	TO cite this article:ZENG Hong-Bing , HE Yong, WU Min , et al. Further Results on Stability Analysisfor Systems with Time-Delay via a Refined Integral Inequality[OL].[21 January 2017] http://en.paper.edu.cn/en_releasepaper/content/4717995

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	3. Dynamic output feedback control for stochastic networked control systems based on periodic event-triggered mechanism
	Mali Xing, Feiqi Deng
	Electrics, Communication and Autocontrol Technology 15 December 2016
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	Abstract:In this paper, the event-triggered dynamic output feedback control for stochastic networked control system is investigated. The measurement output signal is periodically sampled but aperiodically transmitted. Under the periodic event-triggered mechanism, both impulsive system method and time-delay system method are utilized to model the stochastic networked control system, then the corresponding stability criteria are obtained. Based on the stability criteria, the suitable output-based controller and event-triggered parameters are co-designed. An air vehicle system is presented to illustrate the efficiency of the proposed control method.
	TO cite this article:Mali Xing, Feiqi Deng. Dynamic output feedback control for stochastic networked control systems based on periodic event-triggered mechanism[OL].[15 December 2016] http://en.paper.edu.cn/en_releasepaper/content/4713609


	4. A PARTITIONING ALGORITHM OF SMALL WATER SUPPLY NETWORK BASED ON INFOWORKS WS SOFTWARE
	YAO Chen,LI Shaoyuan
	Electrics, Communication and Autocontrol Technology 21 June 2016
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	Abstract:By analyzing operating principle and topology structure, complex water supply network can be abstracted into a weighted directed graph. Using Dijkstra algorithm, minimum dissipated power paths from water sources to all nodes have been calculated to simplify the original network. Combining Sugiyama algorithm, the main network layout with a hierarchical structure and initial District Metering Area can be defined. For those nodes who are far away from the water sources and close to the border area, a boundary criterion has been proposed to check the belongings and to determine the final District Metering Area partition. Finally, a sample town with real data in InfoWorks WS software has been set up. This case study is presented to illustrate the effectiveness of our proposed method
	TO cite this article:YAO Chen,LI Shaoyuan. A PARTITIONING ALGORITHM OF SMALL WATER SUPPLY NETWORK BASED ON INFOWORKS WS SOFTWARE[OL].[21 June 2016] http://en.paper.edu.cn/en_releasepaper/content/4698782


	5. Robust Model Predictive Control of a Three-Phase PV Inverter with uncertain load parameters
	PU Yunfei,WU Jing,LI Shaoyuan
	Electrics, Communication and Autocontrol Technology 21 June 2016
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	Abstract:In this paper, a robust model predictive control strategy is presented for a three-phase inverter for photovoltaic systems. Different from large-scale power systems where the load change are ignored, the effect of load change in local PV systems are considered, which will affect the load current seriously and cannot be neglected. The simulation result shows the inverter output current can track the reference input current well with a lower total harmonic distortion, which illustrates the effectiveness of the proposed method.
	TO cite this article:PU Yunfei,WU Jing,LI Shaoyuan. Robust Model Predictive Control of a Three-Phase PV Inverter with uncertain load parameters[OL].[21 June 2016] http://en.paper.edu.cn/en_releasepaper/content/4698779


	6. Dynamic Visual Servoing Control for Manipulator with Nonlinear Constraint
	Wang Fujie, Liu Zhi, Zhang Yun
	Electrics, Communication and Autocontrol Technology 13 June 2016
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	Abstract:This paper presents an adaptive visual servoing controller for robot manipulator under uncalibrated eye-to-hand configuration with unknown actuator backlash. Most existing control approaches to visual servoing manipulator system ignore actuator backlash constraint, which is inevitable in mechanical robot and will significantly affect the dynamic performance. To eliminate the deleterious effect of the unknown actuator backlash, a smooth adaptive inverse is proposed to compensate the backlash effect. Based on the visual servoing system, a novel adaptive algorithm is developed to estimate the unknown backlash parameters. Moreover, an adaptive image-based visual servoing controller is constructed to guarantee the global stability of closed-loop system and the boundary of parameters. The stability of the dynamic system and asymptotic convergence of the image error are proved by Lyapunov method. Simulation results validate the effectiveness of the proposed controller.
	TO cite this article:Wang Fujie, Liu Zhi, Zhang Yun. Dynamic Visual Servoing Control for Manipulator with Nonlinear Constraint[OL].[13 June 2016] http://en.paper.edu.cn/en_releasepaper/content/4696697


	7. Asymptotic Fuzzy-approximation basedControl of MIMO Systems with Unknown InputNonlinearities and Control Direction
	Chen Ci,Liu Zhi,Zhang Yun
	Electrics, Communication and Autocontrol Technology 03 June 2016
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	Abstract:This paper investigates a fuzzy asymptotic control for MIMO systems with unknown identical control directions,input nonlinearities and external disturbances. Control difficulties from input nonlinearities and their control signs inMIMO systems are simultaneously tackled with the help of a newly constructed Nussbaum theorem. Benefiting fromthis theorem, unmodelled bounded system dynamics and universal approximation errors are also handled withoutconstructing extra robust terms. Hence, both the control simplicity and control robustness are obtained withinthe frame of the developed Nussbaum tool. Furthermore, under the semiglobally uniformly ultimately boundedcondition, the proposed fuzzy control scheme has succeeded in extending the bounded result to the asymptoticconvergence. Finally, a simulation example is carried out to show the proposed approach's effectiveness.
	TO cite this article:Chen Ci,Liu Zhi,Zhang Yun. Asymptotic Fuzzy-approximation basedControl of MIMO Systems with Unknown InputNonlinearities and Control Direction[OL].[ 3 June 2016] http://en.paper.edu.cn/en_releasepaper/content/4696735


	8. Experimental Research of Vehicle-Platoon Coordination Control Based on TORCS Platform
	Xu Zhixiang,Jiang Jiemei,Liu Yonggui
	Electrics, Communication and Autocontrol Technology 25 May 2016
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	Abstract:This paper is an experimental research of vehicle-platoon coordination control based on TORCS platform (The Open Racing Vehicle Simulator). First, the experiment platform is established according to research requirements. Then, an a great deal of experiments is taken to find out the practical algorithms of team coordination control. Finally, the combination of PD control algorithm and the algorithm that the parameters of the differentiation element change along with the derivation of distance between two vehicles is the practical algorithm, which is able to control a vehicle platoon successfully.
	TO cite this article:Xu Zhixiang,Jiang Jiemei,Liu Yonggui. Experimental Research of Vehicle-Platoon Coordination Control Based on TORCS Platform[OL].[25 May 2016] http://en.paper.edu.cn/en_releasepaper/content/4692099


	9. Node Selection for Target Tracking in UWSNs Under Node Location Uncertainty
	Zhang Senlin,Liu Shuqin,Zhang Qiang
	Electrics, Communication and Autocontrol Technology 18 May 2016
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	Abstract:Due to the limited energy and bandwidth resources of Underwater Wireless Sensor Networks (UWSNs), only a small part of nodes are allowed to track underwater target at each time step. As far as we know, almost all the existing node selection schemes assume the true locations of nodes are known. However, such assumption is hard to satisfy due to the mobility of the nodes. This paper presents a new node selection scheme which only depends on the estimated locations of nodes rather than the true ones. Firstly, the uncertainty of node's location is approximated the additional measurement noise via the first-order Taylor series expansion. Then, in order to select nodes under node's location uncertainty, the relation between posterior Cramer-Rao lower bound (PCRLB) and estimated locations of nodes is derived. Then, our tracking scheme which consists of multi-sensor particle filter (PF) and the new node selection scheme is designed to track the underwater target under the uncertainty of node's location. Finally, a simulation is presented to illustrate the tracking improvements obtained by estimating target's state using our scheme.
	TO cite this article:Zhang Senlin,Liu Shuqin,Zhang Qiang. Node Selection for Target Tracking in UWSNs Under Node Location Uncertainty[OL].[18 May 2016] http://en.paper.edu.cn/en_releasepaper/content/4689192


	10. Distributed Fault Detection and Isolation for Multi-agent Systems Using Relative Information
	Yan Li,Hao Fang,Jie Chen
	Electrics, Communication and Autocontrol Technology 25 December 2015
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	Abstract:In this paper, a distributed fault detection and isolation (FDI) strategy, based on the output estimation, is proposed for a class of linear multi-agent systems using only relative information. By applying a series of model transformations, a new distributed fault detection model which can estimate the neighbours' nominal outputs by solving linear system equations is created. By considering the group dominance of nodes undertaking a shared task, a novel event-triggered communication framework exchanging the residual between the actual output and the estimated nominal one in local subsystems is designed to improve the reliability of the fault detection result. A simulation of multi-vehicles undertaking formation control with FDI strategies is given at last.
	TO cite this article:Yan Li,Hao Fang,Jie Chen. Distributed Fault Detection and Isolation for Multi-agent Systems Using Relative Information[OL].[25 December 2015] http://en.paper.edu.cn/en_releasepaper/content/4673351

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