自动门
自动门:动态性能
发布时间:2014/6/2

自动门讯:

动态性能

  稳定是控制系统能够运行的首要条件,因此只有当动态过程收敛时,研究系统的动态

性能才有意义。
    通常在阶跃函数作用下,测定戎计算系统的动态性能。一般认为,阶跃输入对系统来
说是最严峻的工作状态。如果系统在阶跃函数作用下的动态性能满足要求,那么系统在其
    它形式的函数作用下,其动态性能也是令人满意的。
    描述稳定的系统在单位阶跃函数作用下,动态过程随时间的变化状况的指标,称为
动态性能指标。为了便于分析和比较,假定系统在单位阶跃输入信号作用前处于静止状
态,而且输出量及其各阶导数均等于零。对于大多数控制系统来说,这种假设是符合实际
情况的。
   在实际应用申,常用的动态性能指标多为上升时间、调节时间和超调量。通常,用“或
tP评价系统的响应速度;应当指出,除简单的一、二阶系统外,要精确确定这些动态性能
指标的解析表达式是很困难的。
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