设计以89C51单片机、ADC、DAC等电路和运放电路组成的被控对象构成的单闭环反馈控制系统。

1. 硬件电路设计：89C51最小系统加上模入电路ADC0809和模出电路TLC7528；由运放构成的被控对象。

2. 控制算法：增量型的PID控制。

3. 软件设计：主程序、定时中断程序、A/D转换程序、滤波程序、D/A输出程序、PID控制程序等。

-Designed to 89C51 single-chip, ADC, DAC, such as circuit and operational amplifier circuit composed of the object consisting of a single closed-loop feedback control system. 1. Hardware Circuit Design: 89C51 minimum system together with the mold and mold into the circuit ADC0809 Circuit TLC7528　OPAMP posed by the charged object. 2. Control algorithm: PID control of the incremental type. 3. Software design: the main program, timer interrupt procedures, A/D conversion process, filtering process, D/A output process, PID control procedures.