由于制造工艺和实际工作环境的影响，实际电子线路中的元器件及输入参数与其标称值之间总是存在着随机误差。

With the influence of manufacture technology and practical working environment, there are random errors between the nominal value and the component or input parameters in electronic circuits.

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由于制造工艺和实际工作环境因数的影响，实际电子线路中的元器件及输入参数与其标称值之间总是存在着随机误差。

Due to the influence of manufacture technology and practical working environment, there are random errors between the nominal value and the component or input parameters in electronic circuits.

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进一步给出了已知系统参数摄动界时的标称控制器的设计方法。

Furthermore, a design method for the controller with known uncertainty bound of system parameter was presented.

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