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首页> 外文会议>Saint Petersburg international conference on integrated navigation systems; 20090525-27; Saint Petersburg(RU) >OPEN-LOOP HIGH-PRECISION SYSTEMS OF PROGRAMMED CONTROL OF REORIENTATION OF NON-RIGID ORBITAL TELESCOPE
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OPEN-LOOP HIGH-PRECISION SYSTEMS OF PROGRAMMED CONTROL OF REORIENTATION OF NON-RIGID ORBITAL TELESCOPE

机译：非刚性轨道望远镜定向程序控制的开环高精度系统

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摘要

A problem related to design of the programmed control of reorientation (i.e. variation of the attitude control) of an orbital telescope in the central field of gravitation under uncertainty bound up with the parameters and the structure of its dynamical model is considered. The computation of the desired control is based on the direct method of computing programmed controls of the operation regimes for nonlinear autonomous systems [1], which is stable with respect to small errors. A modified version of the iterative algorithm of numerical implementation of the direct method has a modular structure, which allows one to reconstruct the algorithm on each step of computations and on account of results of the previous iteration. An important difference of the modified algorithm from its previous versions is employment of the following two models in the process of computing the control: (ⅰ) a linearized reduced model and (ⅱ) a complete nonlinear one. In the process of computations, the reduced model is reconstrcuetd on account of the output of the complete model. This has allowed us to elevate the precision of the orientation (attitude control) of the telescope's optical axis, while taking account of the disturbing influence of both the nonrigid solar panels and the central field of gravitation in the process of comptations. It has been confirmed by numerial computations that the "direct" control computed with the aid of the reduced model and with the use of the algorithm which is stable with respect to the data errors and is related (closed) to the complete model, provides for the desired precision of attitude control of the nonrigid telescope under the disturbing influence of the Newtonean field of forces and under uncertainty of values of the parameters.
机译：考虑到在不确定性与参数及其动力学模型的结构联系在一起的情况下，万有引力中心场中轨道望远镜的重新定向程序控制（即姿态控制的变化）的设计问题。所需控制的计算基于对非线性自治系统[1]的运行状态进行编程控制的直接计算方法，该方法相对于小误差是稳定的。直接方法的数值实现的迭代算法的修改版本具有模块化结构，该模块结构允许在计算的每个步骤上并考虑到先前迭代的结果来重建算法。修改后的算法与其先前版本的一个重要区别是在计算控制过程中采用了以下两个模型：（ⅰ）线性化的简化模型和（ⅱ）完整的非线性模型。在计算过程中，根据完整模型的输出来重建简化模型。这使我们能够提高望远镜光轴的定向（姿态控制）的精度，同时考虑到非刚性太阳能电池板和引力中心场在计算过程中的干扰影响。通过数值计算已经证实，借助于简化模型并且使用相对于数据错误是稳定的并且与完整模型相关（闭合）的算法，所计算出的“直接”控制提供了：在牛顿力场的干扰影响和参数值不确定的情况下，非刚性望远镜的姿态控制所需的精度。

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