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Design of a sub-optimal digital controller for an antenna control system.

机译：天线控制系统的次优数字控制器的设计。

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摘要

This thesis deals with the design of a digital controller for a relatively complicated antenna system which contains several nonlinearities and is of a degree of complexity which makes a mathematical analysis of the control problem extremely difficult if not impossible.;A simplified model which gave satisfactory outputs for a variety of step inputs was obtained. The state equations were derived from this model and used in attempts to determine the theoretical optimum control for a step input command to the system. Two methods were used but both failed to yield useful results. Thus, instead of employing the theoretical solution as a standard of performance, a graphical approach was taken.;It was found that the control system was velocity limited for large step inputs. The graph of the position error of the system with a bang-bang controller thus represented an easily understood and relatively precise measure of the degree by which other control schemes fell short of achieving a true optimal control.;The type of control algorithm which was developed is easy to implement and has an almost minimum time response with no overshoot for step input commands. Antenna velocity is normally zero at both endpoints. In addition the algorithm makes possible the elimination of the compensation network. This is presently used to condition the command signals which are passed from the computer to the control system.;The problem was approached by first simulating the system on a hybrid computer. Then, before the implementation of the experimental controller, attempts were made to obtain a representative mathematical model which could be used as a yard stick to measure the digital controller performance against a theoretical optimum.
机译：本文针对一个相对复杂的天线系统的数字控制器的设计进行了研究，该天线系统包含多个非线性并且具有一定程度的复杂性，这使得对控制问题的数学分析非常困难，即使不是不可能。用于各种步骤的输入。状态方程是从该模型导出的，用于尝试确定对系统的步进输入命令的理论最佳控制。使用了两种方法，但是都无法产生有用的结果。因此，没有采用理论上的解决方案作为性能标准，而是采用了图形化的方法。发现控制系统对于大步长输入具有速度限制。因此，使用bang-bang控制器的系统的位置误差图代表了一种易于理解且相对精确的度量，用于衡量其他控制方案无法实现真正​​的最佳控制的程度。易于实现，几乎没有时间响应，而且步输入命令没有过冲。通常，两个端点的天线速度均为零。另外，该算法使得消除补偿网络成为可能。目前，它用于调节从计算机传递到控制系统的命令信号。该问题是通过首先在混合计算机上模拟系统来解决的。然后，在实施实验控制器之前，试图获得一个有代表性的数学模型，该模型可以用作衡量标准理论上数字控制器性能的标准。

著录项

  • 作者

    Findeis, J. H.;

  • 作者单位

    University of Ottawa (Canada).;

  • 授予单位 University of Ottawa (Canada).;
  • 学科 Engineering Electronics and Electrical.
  • 学位 M.Sc.
  • 年度 1969
  • 页码 50 p.
  • 总页数 50
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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