自动门
自动门:动态过程与稳态过程
发布时间:2014/5/30
自动门讯:
动态过程与稳态过程
    在典型输入信号作用下,任何一个控制系统的时间响应都由动态过程和稳态过程两
部分组成。
    (1)动态过程
    动态过程又称过渡过程或瞬态过程,指系统在典型输入信号作用下,系统输出量从初
始状态到最终状态的响应过程。由于实际控制系统具有惯性、摩擦以及其它一些原因,系
统输出量不可能完全复现输入量的变化。根据系统结构和参数选择情况,动态过程表现为
衰减、发散或等幅振荡形式。显然,一个可以实际运行的控制系统,其动态过程必须是衰减
的,换句话说,系统必须是稳定的。动态过程除提供系统稳定性的信息外,还可以提供响应
速度及阻尼情况等信息。这些信息用动态性能描述。
    (2)稳态过程
    稳态过程指系统在典型输入信号作用下.当时间f趋于无穷时,系统输出量的表现方
式。稳态过程又称稳态响应,表征系统输出量最终复现输入量的程度,提供系统有关稳态
误差的信息,用稳态性能描述。
    由此可见,控制系统在典型输入信号作用下的性能指标,通常由动态性能和稳态性能
两部分组成。
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