Chapter Two automatic Control 2. 4 Closed loop control In closed loop control, there is a feedback function from the output of objective to the controller Input Differencl Controller Actions Output 被控对象 Me easures Closed loop control system2.4 Closed loop control In closed loop control, there is a feedback function from the output of objective to the controller Input Difference Actions Controller Measures 被控对象 Output _ Closed loop control system Chapter Two Automatic Control