自动门
自动门:线性系统的特性
发布时间:2014/4/17
自动门讯:
线性系统的特性
    用线性微分方程描述的元件或系统,称为线性元件或线性系统。线性系统的重要性质
是可以应用叠加原理。叠加原理有两重含义,即具有可叠加性和均匀性(或齐次性)。
    线性系统的叠加原理表明,两个外怍用同时加于系统所产生的总输出,等于各个外作
用单独作用时分别产生的输出之和,且外作用的数值增大若干倍时,其输出亦相应增大同
样的倍数。因此,对线性系统进行分析和设计时,如果有几个外作用同时加于系统,则可以
将它们分别处理,依次求出各个外作用单独加入时系统的输出,然后将它们叠加。此外,每
个外作用在数值上可只取单位值,从而大大简化了线性系统的研究工作。
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