重点介绍了控制方案和控制语言，给出了程序框图。

The control strategy and control language are focused and the program flowchart is given.

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文章给出了主要的系统硬件电路图和软件流程框图，及用c 51语言编写的主程序源代码。

It provides the main system hardware circuit diagram and software flow frame and the main programme source code written with C51 language.

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同时，给出了以80c 196汇编语言实现的，根据采样周期进行软启动或变参数PI控制的软件程序框图。

The block diagram of the system software that the soft start-up and the variable parameters PI control is realized with assemble language 80c196 according with sampling period is given out.

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