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A novel GIS platform for UGV application in the unknown environment

A novel GIS platform for UGV application in the unknown envi...

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International Conference on Geoinformatics

作者： Qiangrong Yang Meiling Wang Mei-po Kwan Yi Yang Key Laboratory of Intelligent Control and Decision of Complex System Beijing China School of Automation Beijing institute of Technology Beijing China Department of Geography and Geographic Information Science University of Illinois at Urbana Champaign Champaign IL USA

ISBN: (纸本)9781467376648

Recently, the UGV (Unmanned Ground Vehicle) receives more and more attention from the public with the application in deep space exploration, national defense, and riot relief. Moreover, how to describe the driving environment of UGV with the sensor data objectively and share these data with other UGV efficiently becomes the focus of the research of the UGV. To solve the above problems, a novel GIS platform for UGV application in the unknown environment is proposed in this paper based on the features of UGV. First, the GIS database is redesigned and the properties such as road width, lane number, lane info, and if_traffic are proposed. The data structure of the database is redesigned to fit the need of UGV to describe the environment simply and explicitly. Then a two-line road model is proposed to model the feature of the road network clearly. This model can meet the driving need of UGV and represent the traffic rules of the urban environment. Moreover, the turning path in the intersection is designed to be an arc instead of a right angle path considering the dynamic features of UGV. Finally a cost map for navigating the UGV locally is generated with the road model and the environment information from the sensors. The GIS platform designed in this paper proves to be able to offer guidance and help to UGV for driving through the unknown environment wisely and quickly without human intervention. And it shows promising application of sharing data with other UGV efficiently by using cost map instead of the original sensor data.

关键词： Navigation Vehicles Robots

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Study of control parameters tuning method for hydro-viscous driver system

Study of control parameters tuning method for hydro-viscous ...

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International Conference on Fluid Power and Mechatronics (FPM)

作者： Ligang Ma Deyang Zhang Shoukun Wang Junzheng Wang Key Laboratory of Intelligent Control and Decision of Complex Systems School of Automation Beijing Institute of Technology Beijing China Chinese North Vehicle Research Institute Beijing China

ISBN: (纸本)9781479987719

Hydro-viscous speed clutch (HVC) is a central control element of the driver system. Because of nonlinearities and hysteresis of the clutch, the setting of control parameters has a significant impact on the performance of the speed control system. This paper studies the HVC of a vehicle temperature control system, and analyzes the parameters tuning method of a PID controller for the closed-loop control system. By employing a two-storey optimized control framework, the resulting model from identification can be used to complete the control parameters auto-tuning. Simulation and experimental results have showed that this auto-tuning method can obtain a group of parameters in terms of a desired performance index, which guarantees the balance of dynamic characteristics, stability and anti-jamming in closed-loop system.

关键词： Mathematical model Vehicles Tuning Friction Velocity control Cooling Valves

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Shared control for teleoperation enhanced by autonomous obstacle avoidance of robot manipulator

Shared control for teleoperation enhanced by autonomous obst...

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IEEE/RSJ International Conference on intelligent Robots and systems

作者： Xinyu Wang Chenguang Yang Hongbin Ma Long Cheng Centre for Robotics and Neural Systems Plymouth University Plymouth UK State Key Lab of Intelligent Control and Decision of Complex System Beijing Institute of Technology Beijing China Ministry of Education South China University of Technology Guangzhou China State Key Laboratory of Management and Control for Complex Systems Chinese Academy of Sciences Beijing China

In this paper, a human robot shared control strategy is developed and tested on a Baxter robot. Using the proposed method, the human operator only needs to consider the motion of the end-effector of the manipulator, while the manipulator will avoid obstacle by itself without sacrificing the end effector motion performance. An improved obstacle avoidance strategy based on the joint space redundancy of the manipulator is designed. A dimension reduction method is presented to solve the over defined problem of avoiding velocity to achieve a more efficient use of the redundancy. By employment of an artificial parallel system of the teleoperate manipulator and the task switching weighting factor, the proposed control method enable the robot restoring back to the commanded pose smoothly when the obstacle is removed. By implementing the dimension reduction method, the trajectory of each joint of the manipulator can be controlled at the same time to achieve the restoring task. Thus, the proposed control method can eliminate the impact of the obstacle on the remaining task. Satisfactory experiment results demonstrate the effectiveness of the proposed methods.

关键词： Manipulators Collision avoidance Robot kinematics Trajectory Kinematics Robot sensing systems

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Gait planning and compliance control of a biped robot on stairs with desired ZMP 19

Gait planning and compliance control of a biped robot on sta...

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19th IFAC World Congress on International Federation of Automatic control, IFAC 2014

作者： Chen, Guangrong Wang, Junzheng Wang, Lipeng Key Laboratory of Intelligent Control and Decision of Complex System Beijing Institute of Technology BeijingCO 100081 China

ISBN: (纸本)9783902823625

For biped robot, friendly environment interaction makes sense. In this paper, a new method to plan the gait and control a biped robot on stairs with desired ZMP is proposed first. The desired ZMP derived from an iterative optimal algorithm not only has enough stability margin and satisfies actuator specifications, but also is available to implement and energy saving. Then, a controller with force sensing and variable impedance is proposed, which can sense and compensate the environmental disturbance well. Finally, the effectiveness of the proposed methods is confirmed by simulation examples. © IFAC.

关键词： Compliance control

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A Composite controller Strategy for Electromechanical Actuator Using a Permanent-Magnet Synchronous Motor 33

A Composite Controller Strategy for Electromechanical Actuat...

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第三十三届中国控制会议

作者： WANG Chenyi GAN Minggang QIAO Zhi School of Automation Beijing Institute of Technology Key Laboratory of Intelligent Control and Decision of Complex Systems

ISBN: (纸本)9781479947249

Considering the uncertainties parameters and unknown dynamics of permanent-magnet synchronous motors in real applications,a composite controller strategy for electromechanical actuator is proposed in this *** composite strategy consists of a disturbances observer based on linear extended state observer that suppresses disturbances by feedforward compensation and a Lyapunov stability-based position controller.A non-singular terminal sliding mode position controller is used here due to its good performance,under which state errors would converge to zero in finite ***,special forms of load torque,hinge moment,and sinusoidal torque disturbances have been taken into consideration in this *** proposed control strategy is verified via *** performance with respect to position tracking and robustness to load disturbances and parametric uncertainties of the motor have been demonstrated.

关键词： Electromechanical Actuator,PMSM,Non-Singular Terminal Sliding Mode,Extended State Observer,hinge moment

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A Novel Link Scheduling for Special Re-use TDMA on Ad Hoc Networks 33

A Novel Link Scheduling for Special Re-use TDMA on Ad Hoc Ne...

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第三十三届中国控制会议

作者： Li Weijie School of Automation Beijing Institute of Technology Key Laboratory of Intelligent Control and Decision of Complex Systems

ISBN: (纸本)9781479947249

Special Re-use TDMA(STDMA) emerges as a promising channel access technique for providing Quality of Service(QoS) guarantees in multi-hop ad Hoc networks such as community mesh and sensor networks. The contention-free channel access combined with special reuse of the channel provides significant benefits in the energy/throughput trade-off. However, the protocol may introduce scheduling delay if, on the same path, an outbound link on a router is scheduled to transmit before an inbound link on that router. The total scheduling delay can be quite large since it accumulates at every hop on a path. This paper presents a method to solve this problem to improve the performance of the network system. Compared to the origin STDMA protocol, simulation results present us the superior performance of the proposed algorithm.

关键词： STDMA,multi-hop ad Hoc networks,scheduling delay

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Sliding Mode control Using linear extended state observer(LESO) and Hysteresis Compensator based on Bouc-Wen model in Sinusoidal Position control of a Piezoelectric Actuator 33

Sliding Mode Control Using linear extended state observer(LE...

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第三十三届中国控制会议

作者： QIAO zhi GAN minggang WANG chenyi School of Automation Beijing Institute of Technology Key Laboratory of Intelligent Control and Decision of Complex Systems

ISBN: (纸本)9781479947249

In this paper,a sliding mode control using LESO coupled with an inverse hysteresis compensator is proposed for the motion tracking control of a microposition system with piezoelectric actuator(PEA).The inverse hysteresis compensator is involved in eliminating the hysteresis nonlinearity reducing the nonlinear system to a linear ***,a sliding mode controller combining with LESO is adopted to handle all the unmodeled dynamics and disturbances,with an intention of improving and enhancing the dynamic performance and the robustness of *** feasibility of the proposed control scheme is verified by experiment of a *** result shows that when faced with a fast-rate control input,the proposed method can also ensure the system a good performance.

关键词： Bouc-Wen Model,Hysteresis Compensator,Sliding Mode control,Linear Extended State Observer

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Global MPPT for PV systems under Partially Shaded Conditions Based on Voltage Band 33

Global MPPT for PV Systems under Partially Shaded Conditions...

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第三十三届中国控制会议

作者： Fan Xinyu DENG Fang LI Fengmei School of Automation Beijing Institute of Technology Key Laboratory of Intelligent Control and Decision of Complex Systems

ISBN: (纸本)9781479947249

This paper presents a novel maximum power point(MPP) tracking(MPPT) method to increase photovoltaic(PV)system performance during partially shaded conditions(PSCs). The method is based on voltage scanning method. Voltage band method and restricted voltage scanning method is used to increase the scanning speed. A method is proposed to determine whether partial shading occurs. The main advantage of the proposed method is the ability to search the global peak *** results shows the good performance of proposed method.

关键词： Maximum Power Point Tracking(MPPT),Voltage band,Partially Shaded Conditions

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Research on speed and tension multivariable system of reversible cold strip mill based on ILQ theory

Research on speed and tension multivariable system of revers...

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International Conference on Machine Learning and Cybernetics (ICMLC)

作者： Gang Zheng Xiao-Li Chao Zhe Yang Fu-Caiqian Shaanxi Key Laboratory of Complex System Control and Intelligent Information Processing Xi'an University of Technology Xi'an China Xi'an University of Technology Xi'an Shaanxi CN

ISBN: (纸本)9781467372220

For the speed and tension system of reversing cold strip mill with multivariable, uncertainties and strong coupling, a new method of inverse linear quadratic (ILQ) is proposed. Firstly, a relatively complete mathematical model for the speed and tension multivariable coupling system is established by using the mechanism modeling method. Then according to the state-space expression of the controlled system and aspirations closed-loop poles, optimal feedback matrix is obtained by ILQ method. Instead of choosing the weighted matrix simplifies the design process, and the asymptotic behavior of the system is robust. Simulation results show the effectiveness of this method.

关键词： Reversible cold strip mill Speed and tension multivariable control system inverse linear quadratic (ILQ) pole-assignment cold strip Cold strip mills pole assignment design process multiple input multiple output systems tension speed Aspirations (Psychology) system behavior asymptotic behavior

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Paragraph Vector Based Retrieval Model for Similar Cases Recommendation

Paragraph Vector Based Retrieval Model for Similar Cases Rec...

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第六届全国语言动力系统研讨会

作者： Yifei Zhao Jing Wang Fei-Yue Wang Xiaobo Shi The State Key Laboratory of Management and Control for Complex Systems Institute of Automation Chine Institute of Smart Healthcare System Qingdao Academy of Intelligent Industries Qingdao China

Internet inquiry is playing an increasingly important role as the complement of the traditional medical service system,especially the similar cases *** can not only save the patients' waiting time,but also make use of the historical resources,for many cases with the same purpose have been solved ***,because of the diversity and non-standard of the patients' descriptions,the inquiry platform cannot find the cases with similar semantic *** traditional retrieval methods require the overlap of two sentences,and this is not suitable with the diversity and non-standard *** this paper,we try to utilize the sentences' semantic representation in a continuous space to understand the cases,and then recommend the similar *** also incorporate it into query likelihood language models,trying to get better *** experimental data are all collected from a real internet inquiry platform,and the results show that our methods significantly outperform the state-of-the-art translation based methods for similar cases recommendation.

关键词： internet inquiry similar cases recommendation distributed representation data mining

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