空间交会停靠的变结构控制

Variable Structure Control for Space Rendezvous and Berthing

介绍空间交会对接中的接近段采用的变结构控制方法。变结构控制中滑动模态的设计很重要 ,比较常见的滑动模态设计为状态变量的线性关系。根据相对运动方程的特点 ,设计了非线性的滑动模态 ,并对其稳定性作出了证明 ;还对变结构控制方法和经典的 PID控制方法进行了比较 ,变结构控制比 PID控制的控制精度差 ,但是燃料消耗要少。

The variable structure control method for the closing phase of the space rendezvous and berthing is introduced.The sliding mode is very important in the variable structure control but often designed to the linear relationship of the state variable.In items of the characteristic of the relative motion equations,the nonlinear sliding mode is designed and the stability of the system is proved.Compared with the PID control method,the control accuracy of the variable structure control method is lower than that of PID control method,but the consumption less than that of the PID control method.