Electro-hydraulic Servo Control System Design of HIL Simulator for Spacecraft On-orbit Docking
This paper presents a brief introduction on Hardware-In-the-Loop (HIL) simulation system for on-orbit docking. A 1 degree-of-freedom (DOF) HIL simulation system model is established. The stiffness of docking mechanism varies in large scale. The HIL simulation system design problem is defined as a two-degree-of-freedom control structure design problem. But the precondition of the pre-filter of the two-degree-of-freedom control structure is that the sensitivity of the dynamic characteristics of the simulation/hardware interface to the variation of factors such as load stiffness is lower. This can be done by enlarging the effective area of the hydraulic actuator; the hydraulic spring rate is enlarged and the ratio of the payload stiffness to the hydraulic spring rate is much less. This is the key problem of the electro hydraulic servo control system design.Above ideas is verified with root-locus plot. Further more the hydraulic power element model is simplified.The transfer characteristics of the simulation/hardware interface and the loop transfer characteristics of the HIL simulation system are analyzed.The simulation results with nonlinear docking mechanism model demonstrate that the ideas and the methods discussed above are feasible and practical.
hydraulic control system spacecraft on-orbit docking two-degree-of-freedom control HIL simulation
Chang Tongli Cong Dacheng Ye Zhengmao Han Junwei
School of Mechatronics Engineering, Harbin Institute of Technology, No.92, Xi Da ZhiJie Street, Harbin,Heilongjiang, 150001, China
国际会议
北戴河
英文
580-584
2007-06-06（万方平台首次上网日期，不代表论文的发表时间）