IC693ACC303
IC693ACC303伺服系统组成原理框图
1、比较环节
比较环节是将输入的指令信号与系统的反馈信号进行比较，以获得输出与输入间的偏差信号的环节，通常由专门的电路或计算机来实现。
2、控制器
控制器通常是计算机或PID（比例、积分和微分）控制电路，其主要任务是对比较元件输出的偏差信号进行变换处理，以控制执行元件按要求动作。
3、执行环节
执行环节的作用是按控制信号的要求，将输入的各种形式的能量转化成机械能，驱动被控对象工作。机电一体化系统中的执行元件一般指各种电机或液压、气动伺服机构等。
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