NDLI: Crossed-feedback control of dual-redundancy permanent magnetic brushless dc servo system used in electro-hydrostatic actuator

Content Provider	IEEE Xplore Digital Library
Author	Zhou Qixun Li Shengjin Lu Gang Zhou Yong
Copyright Year	2008
Description	Author affiliation: Dept. of Mechatron. Eng., Northwestern Polytech. Univ., Xian (Zhou Qixun; Li Shengjin; Lu Gang; Zhou Yong)
Abstract	Integrated electro-hydrostatic actuation system has the advantages of both small size and high power density. Dual-redundancy permanent magnet brushless DC motor (BLDCM) as the actuation component in electro-hydrostatic actuator (EHA) improves system reliability. But unequal electromagnetic torque in different redundant motor is a severe problem. It may impact the performance of the motor, even damage it. In this paper the cause and consequence of the unequal torque are deeply analyzed. A method of crossed-feedback control for realizing equal torque in dual-redundancy permanent magnetic brushless DC servo system is proposed. After analyzing different kind of redundancy running modes and structures of dual-redundancy motor, the system scheme is carried out. The hardware structure and control strategy of three closed loop of dual-redundancy EHA servo system for aircraft rudder are introduced. The implementation of the basic control circuits and devices are introduced too. Experiments show that the crossed-feedback control method can effectively eliminate torque unequal. The system frequency response can achieve 5 Hz, which can meets modern aircraftpsilas requirements to the actuation system, and it can be widely used in the future power-by-wire flight control system.
Starting Page	1237
Ending Page	1241
File Size	543659
Page Count	5
File Format	PDF
ISBN	9781424438266
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-10-17
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	IEEE Consumer Electronics Society(CES)
Subject Keyword	Control systems Servomechanisms Actuators Brushless DC motors DC motors Permanent magnet motors Servomotors Magnetic analysis Torque control Aerospace control
Content Type	Text
Resource Type	Article

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