Force equalization in hybrid actuation systems
This communication deals with the problem of force fighting that occurs in active-active redundant position controlled actuators, typically on flight control systems for airplanes. Force equalization strategies for the hybrid actuation system, in which a servovalve controlled hydraulic actuator (SHA) and an electromechanical actuator (EMA) drive the same control surface, are proposed and compared. The hybrid actuation system can provide a dissimilar redundant flight control actuation and might be introduced into future airborne actuation system of the More Electric Aircraft (MEA). However, force fighting will occur due to the cross coupling introduced by the flight control surface that sums the forces of the two actuation channels. Linear and nonlinear models of the SHA, EMA and control surface are firstly built and combined to get the global model of the hybrid actuation. Each model is validated through experiments performed on a dedicated test bench. Then, the force fighting phenomenon is analyzed based on the linear model. Thirdly, three force equalization control strategies are proposed and assessed using the validated nonlinear model that is used as a virtual but realistic test bench.
Actuator Force fighting Force equalization Hybrid Electrohydraulic Electromechanical
Haitao Qi Jean-Charles Mare Yongling Fu
Department of Mechatronics, School of Automation Science and Electrical Engineering, Beihang Univers Universite de Toulouse, INSA - UPS, LGMT (Laboratoire de Genie Mecanique de Toulouse)135, avenue de
国际会议
杭州
英文
406-411
2009-04-08（万方平台首次上网日期，不代表论文的发表时间）