2015年11月25日 · A PID controller can cause hunting when its actuator is subject to deadtime and/or rate limitations. In this flow control example, an especially aggressive controller is using a rate-limited valve to maintain the flowrate downstream.

2023年3月15日 · Control hunting due to improper proportional–integral–derivative (PID) parameters in the building automation system (BAS) is one of the most common faults identified in commercial buildings. It can cause suboptimal performance and early failure of heating, ventilation, and air conditioning (HVAC) equipment.

Below some critical value, depending upon the lag characteristics of the process, hunting will occur. This hunting Indicates that the IAT has been reduced too far. Now increase the time to approximately twice this value to restore the desired stability.

Tuning a PID controller can be difficult knowing where to start, and what direction to go. This article will provide solutions to both of these, setting up a PID controller from scratch and more! To start, read “PID Controller Explained“, to learn what a PID controller is and how it works.

2019年9月13日 · A technical definition of hunting, in the context of motion control, is periodic oscillation of the axis about the target position. Image credit: American Motion Technology. The underlying cause of hunting is that while the system is attempting to minimize error between the actual and commanded positions, the error is constantly varying.

2007年3月1日 · The proportional and derivative actions of a PID controller can also exacerbate hunting, depending on the behavior of the process. Reset windup Integral action comes into play in situations where a process has an actuator that is …

Hunting, also known as oscillation or cycling, is a common problem in control loops that can affect the performance, stability and safety of a process. Hunting occurs when the control loop...

2024年11月15日 · Easy to understand look at PID tuning. What do the terms mean, what do they do and how to tune them. Open loop targets to closed loop PID tuning

Because the dynamics of liquid pressure control loops and flow control loops are similar, the two controllers might be tuned very similarly, causing the hunting between the two loops. To solve this, the most important loop needs to be tuned for fast response, and the loop of secondary importance needs to be tuned significantly slower (three ...

像伺服驱动器中就会有死区来避免因为反复的致能-不致能循环而造成的振荡（在比例控制系统中称为hunting）。 在机械系统中也有类似死区的概念，例如齿轮组中的背隙。