双余度机电作动器力纷争机理及敏感性

Mechanism and sensitivity of force fight in dual redundant electromechanical actuators

双余度主-主模式机电作动系统的位置跟踪过程始终存在对伺服系统安全性不利的力纷争问题,为了更好地抑制力纷争需要解析力纷争的作用机理,确定系统参数对力纷争的影响机理和规律。通过理论分析得到力纷争影响参数,通过蒙特卡罗仿真实验研究了各参数对系统动态力纷争和静态力纷争产生的影响,并对参数进行了力纷争影响的敏感性分析,确定对系统力纷争影响最大的几类因素:位置信号断续、位置信号偏置、位置传感器延迟、传动间隙,为飞控系统力均衡控制方法的设计和系统的符合性验证提供了参考依据。

Existence of force fight in the position response process of the active-active dual redundant electromechanical actuation system is harmful to the safety of servomechanism.To better mitigate force fight,it is necessary to analyze its origin and determine the influence mechanism of system parameters on it.The parameters which have effect on force fight are obtained through theoretical analysis.Through Monte-Carlo simulation,the influence of each parameter on dynamic force fight and static force fight is discussed.By sensitivity analysis of the parameters which have effect on force fight,the parameters that have the greatest influence on force fight are obtained,including position signal discontinuity,position signal offset,delay of position sensor,and backlash,which can provide a reference for the design of the force equalization control method for the flight control system and conformity verification consideration.