general, the etrol system are represented by the
block diagram of Fig.16.1 an input signal
or command γ is applied to the controller,
•Lesson开环与闭环控制
Unite 16 Open-loop and Closed-loop Control
• 当一个系统没有反馈结构时，我们称之为 开环系统，这是最简单也是最经济的控制 系统。但是，开环控制系统缺少精确度和 多方面适应性因此只能在最简单的环境中 使用。
•Lesson开环与闭环控制
•Lesson开环与闭环控制
Unite 16 Open-loop and Closed-loop Control
• However, it is quite likely that the house temperature is either above or below the desired value, owing to inaccuracy in the estimate. Without further deliberation, it is quite apparent that this type of control is inaccurate and unreliable. One reason for the inaccuracy lies in the fact that one may not know the exact characteristics of the furnace. The other factor is that one also no control over the outdoor temperature, which has a definite bearing on the indoor temperature.
