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针对在挠性空间结构中挠性模态不可测的特点 ,仅利用输出信息设计变结构控制器 .把模态截断所引起的模型不精确以及非线性部分均当作模型的未知部分 .采用了多个滑动平面切换的方式 ,先以较小的趋近时间到达一个滑动平面 ,在该平面上滑动一段时间 ,再趋向于另一个平面 ,以加快收敛速度 .最后 ,具体卫星模型的仿真结果表明 ,该方法具有很好的控制效果 .
In view of the unmeasurable nature of the flexible mode in the flexible space structure, the variable structure controller is designed by using only the output information. The inaccurate model and the nonlinear part caused by the modal truncation are taken as the unknown part of the model. The method of switching multiple sliding planes first reaches a sliding plane with a smaller approaching time, slides on the plane for a period of time, and then tends to the other plane to speed up the convergence rate.Finally, the simulation results of a specific satellite model show that , This method has very good control effect.