The Effects and Design Optimization of Backlash Nonlinearity in the Actuator of Aerospace Vehicle

Ordinary the control system of the aerospace vehicle (ASV) is designed basing on itself linear system. However, there are some non-linear parts in the actuator which can effects flight attitude control. Using the methods of analyzing linear system cannot identify the factors influencing the control system. This paper use description function to analyze the effects for control system. On that basis, this paper put forward a new approach which changes control system by adding series leading correction and reducing gain. Meanwhile, this article proposed an optimal design scheme considering nonlinearity of ASV.