MPL-B960B-MJ74AA

MPL-B960B-MJ74AA

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。                       

4、被控对象  被控对象指被控制的物件，例如一个机械手 臂，或是一个机械工作平台。   5、检测环节  检测环节是指能够对输出进行测量并转换成比较环节所需要的量纲的装置，一般包括传感器和转换电路。  

伺服系统的特点和功用

伺服系统与一般机床的进给系统有本质上差别，它能根据指令信号地控制执行部件的运动速度与位置。伺服系统是数控装置和机床的联系环节，是数控系统的重要组成，具有以下特点：  

具备的传感器，能准确地给出输出量的电信号。  

功率放大器以及控制系统都是可逆的。  

足够大的调速范围及足够强的低速带载性能。  

快速的响应能力和较强的抗干扰能力。

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