| 星上计算机几种离散化算法的比较 |
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| 引用本文： | 周文忠,孙宝祥.星上计算机几种离散化算法的比较[J].航天控制,1992(2). |
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| 作者姓名： | 周文忠 孙宝祥 |
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| 作者单位： | 北京控制工程研究所，北京控制工程研究所 |
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| 摘 要： | 本文陈述并比较了连续时间系统的各种时间-离散化方法,认为阶跃响应不变(或零阶保持器)法比较适于工程实际应用.对分子分母均为二阶连续系统,分母阻尼系数D_2大于1.0、小于1.0或等于1.0这三种情况分别给出了用阶跃响应不变的时间-离散化法得到的差分方程和状态空间方程各项系数的解析计算式.讨论了差分方程形式和状态空间方程形式的等价性问题.最后说明了一个带有液体晃动和太阳帆板挠性特性的三轴稳定卫星姿态控制器是相当复杂的,星上计算机的工作量也是相当大的,因此要防止计算机出现计算饱和问题并同时注意到截断误差问题.
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| 关 键 词： | 星载计算机 离散化 算法 |
A Comparision of Some Discretization Algorithms on Board Computer |
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| Zhou Wenzhong Sun Baoxing Beijing Institute of Control Engineering.A Comparision of Some Discretization Algorithms on Board Computer[J].Aerospace Control,1992(2). |
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| Authors: | Zhou Wenzhong Sun Baoxing Beijing Institute of Control Engineering |
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| Institution: | Zhou Wenzhong Sun Baoxing Beijing Institute of Control Engineering |
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| Abstract: | In this paper, some algorithms for discretization of continuous-time systems are compared. It is shown that the algorithm of invariant step-response is better than othres in practical engineering applications. The equivalency between the discretization difference and state-space equations is discussed here. Finally it is illustrated that a attitude controller of three axes stabilized satellite with liguid slosh and flexible solar array is quite complex and the computing complexity and workload onboard compnter (OBC) is very much, thus should be preventing calculating saturation of OBC and taking the truncation error effect into account. |
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| Keywords: | On-board computer Discretization Algorithm |
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