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A strong robustness open-circuit fault diagnosis strategy for novel fault-tolerant electric drive system based on d-q-axis current signal

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Chinese Journal of Aeronautics 2021年第10期34卷 115-127页

作者： Xuefeng JIANG Shaoshuai WANG Jie LI Daoyu WU Wenxin HUANG Zhenmao HAN School of Automation Nanjing University of Science and TechnologyNanjing 210094China College of Automation Engineering Nanjing University of Aeronautics and AstronauticsNanjing 210016China Aviation Key Laboratory of Science and Technology on Aero Electromechanical System Integration Nanjing 211106China

To diagnose the Open-Circuit(OC)fault in the novel fault-tolerant electric drive system,based on d-q-axis current signal,a strong robustness diagnosis strategy is proposed and investigated.Fewer independent power supplies and converters are required in the novel fault-tolerant electric drive system based on Dual-Winding Permanent Magnet Motor(DWPMM),and the system’s reliability,usage ratio and power density have been improved compared to the conventional fault-tolerant motor drive system.However,the novel fault-tolerant electric drive system has the OC fault diagnostic false alarms issue when load changes suddenly or under light-load condition.And it lacks the research on the diagnostic method when the system encounters intermittent OC fault in power switches.By theory derivation,simulation and experimental verification,it can be concluded that the proposed strong robustness OC fault diagnosis strategy based on d-q-axis current signal can overcome the OC fault diagnostic false alarms issue when load changes suddenly or under light-load condition.And it can detect and locate the OC fault of single-phase winding in real time,and diagnose the intermittent OC fault of power switches.

关键词： Dual-winding motor Electric drive system Fault-tolerant system Open-circuit fault diagnosis Permanent magnet motor strong robustness

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Development and Control Strategy of Subsea All-Electric Actuators

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Journal of Ocean University of China 2022年第5期21卷 1133-1146页

作者： LIU Peng SHEN Dagang BA Yaoji CAO Jinfeng LIU Jie WANG Lihui School of Mechanical and Automotive Engineering Qingdao University of TechnologyQingdao 266520China Shandong Meichen Industry Group Co. Ltd.Weifang 262200China

The development of subsea all-electric Christmas trees is an area of focus in the offshore oil industry worldwide.The main difficulties are associated with the development and control strategies for subsea all-electric actuators,which are the most criti-cal components of subsea Christmas trees.A single-motor-level fuzzy PID control with an integrated working condition detection mod-ule and a three-motor redundant-level deviation strategy with coupled joint synchronous control were proposed in this paper to real-ize the real time determination of algorithm parameters according to the working conditions,solve the rapid redistribution problems,and maintain the fast speed of the servo motor of the subsea all-electric tree valve actuator.A synchronous control electrical system was built,tested,and verified through simulation analysis.Test results show that the two redundant servo motors can still control the all-electric valve actuator and provide good synchronization control capabilities despite the failure of one servo motor,and the verti-cal and horizontal vibration values of the system are within reasonable ranges.The synchronous control strategy can be applied to the synchronous control problem of subsea all-electric production systems,which is of considerable importance for the development of subsea all-electric production systems.

关键词： subsea all-electric actuator redundant-level deviation strategy synchronous control model synchronous control strategy load shocks strong robustness

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The Predictive Control Based on Hammerstein Model with NU=1

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Systems Science and Systems Engineering 1994年第3期4卷 227-231页

作者： CUI Xiaodi LU Zhunwei XU Rongliang Taiyuan University of Technology, Taiyuan 030024

In acs paper,the generalized predictive control(GPC)law for Hammerstein model with control horizon NU=1 is presented and the algebraic equation satisfied by the GPC law is derived.Also,the simulation study shows tha tthe GPC based on Hammerstein system is such and algorithm which can be controlled by numerical computer with rather strong robustness but without strict demand for the model.

关键词： predictive control Hammerstein model strong robustness

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