1.反馈控制系统:
反馈控制系统基本上是一种控制系统,其输出取决于生成的反馈信号。反馈控制系统负责处理反馈信号,这些反馈信号进一步作为系统的输入。反馈控制系统由不同的元件组成,如电阻器、晶体管和其他起基本功能的电器。反馈又可分为正反馈和负反馈。
2.前馈控制系统:
前馈控制系统是将信号传递给外部负载的系统。它在干扰影响受控变量之前拒绝干扰。它控制主要干扰,并多次与反馈系统组合使用。前馈系统对建模错误很敏感。它直接测量系统中的干扰。
反馈和前馈控制系统之间的区别:
S.NO. | Feedback Control System | Feed Forward Control System | |||
---|---|---|---|---|---|
1. | In feedback system output depends on the generated feedback signal. | In feed forward system the signal is passed to some external load. | |||
2. | Measure of disturbances in the system is not needed by feedback system. | Measure of disturbances in the system is needed by feedback system. | |||
3. | All the disturbances are detected in feedback system. | All the disturbances are not detected in feedback system. | |||
4. | The loop in a feedback system is a closed loop. | The loop in a feedback system is a open loop. | |||
5. | It focuses on the output of the system. | It focuses on the input of the system. | 6. | The variables are adjusted on the basis of errors. | The variables are adjusted on the basis of knowledge. |