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2015年中国智能自动化学术会议

作者： Guoxing Chen Zuojun Liu Lingling Chen Peng Yang School of Control Science and Engineering Hebei University of Technology

In order to make the powered knee joint prosthesis to provide the required power for walking,a driving motor control approach based on finite-state machine is proposed.According to the periodicity and repeatability of the human body movement characteristic,the gait phase is divided into four states by foot pressure signals.With the reference of healthy limb gait information,a movement database for powered prosthesis is established for different terrain and speed conditions.The finite-state machine is used to control powered prosthesis,and a stateflow module structure is build in the controller,making prosthesis limb to move to coordinate with the healthy limb.Finally,the experiment using the prosthesis prototype verified the feasibility of this method.

关键词： finite-state machine Powered prosthesis Knee joint Movement database

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Intelligent Knee Prostheses: A Systematic Review of Control Strategies

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Journal of Bionic Engineering 2022年第5期19卷 1242-1260页

作者： Linrong Li Xiaoming Wang Qiaoling Meng Changlong Chen Jie Sun Hongliu Yu Institute of Rehabilitation Engineering and Technology University of Shanghai for Science and TechnologyNo.516Jungong RoadYangpu DistrictShanghai 200093China Shanghai Engineering Research Center of Assistive Devices Shanghai 200093China Key Laboratory of Neural-Functional Information and Rehabilitation Engineering of the Ministry of Civil Affairs Shanghai 200093China

The intelligent knee prosthesis is capable of human-like bionic lower limb control through advanced control systems and artificial intelligence algorithms that will potentially minimize gait limitations for above-knee amputees and facilitate their reintegration into society.In this paper,we sum up the control strategies corresponding to the prevailing control objectives(position and impedance)of the current intelligent knee prosthesis.Although these control strategies have been successfully implemented and validated in relevant experiments,the existing deficiencies still fail to achieve optimal performance of the controllers,which complicates the definition of a standard control method.Before a mature control system can be developed,it is more important to realize the full potential for the control strategy,which requires upgrading and refining the relevant key technologies based on the existing control methods.For this reason,we discuss potential areas for improvement of the prosthetic control system based on the summarized control strategies,including intent recognition,sensor system,prosthetic evaluation,and parameter optimization algorithms,providing future directions toward optimizing control strategies for the next generation of intelligent knee prostheses.

关键词： Intelligent knee prosthesis finite-state machine Volitional control Sensor system Intent recognition Parameter tuning

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Code design for run-length control in visible lightcommunication

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Frontiers of Information Technology & Electronic Engineering 2020年第9期21卷 1397-1411页

作者： Zong-yan LI Hong-lu YU Bao-ling SHAN De-xuan ZOU Shi-yin LI School of Information and Control Engineering China University of Mining and TechnologyXuzhou 221116China School of Electrical and Data Engineering University of Technology SydneySydney 2007Australia School of Electrical Engineering and Automation Jiangsu Normal UniversityXuzhou 221116China

Run-length limited(RLL)codes can facilitate reliable data transmission and provide flicker-free illumination in visible light communication(VLC)systems.We propose novel high-rate RLL codes,which can improve error performance and mitigate flicker.Two RLL coding schemes are developed by designing the finite-state machine to further enhance the coding gain by improving the minimum Hamming distance and using the state-splitting method to realize small state numbers.In our RLL code design,the construction of the codeword set is critical.This codeword set is designed considering the set-partitioning algorithm criterion.The flicker control and minimum Hamming distance of the various proposed RLL codes are described in detail,and the flicker performances of different codes are compared based on histograms.Simulations are conducted to evaluate the proposed RLL codes in on-off keying modulation VLC systems.Simulation results demonstrate that the proposed RLL codes achieve superior error performance to the existing RLL codes.

关键词： Visible light communication Run-length limited codes finite-state machine Minimum Hamming distance

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Conformance testing of FMI calling sequence for simulation environments

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International Journal of Modeling, Simulation, and Scientific Computing 2019年第2期10卷 156-183页

作者： Awad Mukbil Umut Durak Sven Hartmann Clausthal University of Technology Department of Informatics Julius-Albert-Str.4 Clausthal-Zellefeld 38678Germany German Aerospace Center(DLR)Institute of Flight Systems Lilienthalplatz 7 Braunschweig 38108Germany

Exchanging simulation models is currently of utmost importance.To improve interoperability between suppliers and original equipment manufacturers(OEMs),the functional mock-up interface(FMI)is exchanged in a standard format called functional mock-up unit(FMU).Since its first release,many simulation tools took the initiative to support FMI.However,since then,there have been many complaints stating that exchanging models via FMI does not work as stable as expected.The reason usually turned out to be the implementation of tool vendors that sometimes fail to comply with the standard fully.This paper introduces a methodology for testing FMI compliance of importing simulation tools using a set of reference FMUs.The standard defines the implementation of FMI functions calling sequence in a state machine.Therefore,conformance testing(also called fault detection)from automata theory is utilized to produce reference FMUs based on the FMI state-machine.

关键词： FMI reference FMUs finite-state machine conformance testing

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