The rst justication is that PID controller is by far the most widely used control algorithm in the process industry, and that improvements in tuning of PID controllers will have a signicant practical impact. Tuning a PID Controller Heat treatment processes exemplify the need for PID control. To ensure consistent product quality the temperature inside an oven or furnace must be kept within narrow limits.
PID for Dummies" I personally have a few hundred dollars worth of books on controllers, PID algorithms, and PID tuning. Since I am an engineer, I stand a chance of understanding some of it.
PID Tuning Guide A BestPractices Approach to Understanding and Tuning PID Controllers Tuning PID controllers can seem a mystery. Parameters that provide effective control over a process one day fail to manual mode) tests provide the best data, tests also can be If a velocity loop PID controller is being used to control the speed of the load and command the force being applied by the actuator, then it is beneficial to take the desired instantaneous acceleration, scale that value appropriately and add it to the output of the PID velocity loop controller.
PID controllers may be tuned in a variety of ways, including handtuning, Ziegler Nichols tuning, loopshaping, analytical methods, by optimisation, pole placement, or auto tuning (Smith, 1979; strm& Hgglund, 1995).
According to J. G. Zeigler and N. B. Nichols, optimal tuning is achieved when the controller responds to a difference between setpoint and the process variable with a 14 wave decay ratio. That is to say that the amplitude of each successive overshoot is reduced by 34 until stabilizing at setpoint.
I just came across this article showing the results of using genetic algorithms to tune a PID controller. The link rotted, but archive. org has a copy at Evolve Better Control Solutions With Genetic Algorithms. A PID loop in manual (as opposed to automatic) only changes its OP upon operator request.
A loop in remote has its SP automatically adjusted by external logic. In local the SP is only changed by the operator. Some systems combine auto and remote into cascade mode. PID controllers are modelbased. The model allows the PID to react appropriately to dynamics within the process. In order to understand how your process reacts to changes, you must step the process within the DLO.
PID Controllers. PAX2C; PXU; Modular Controller PID Controllers Manual Tune Procedures TNPC01; PID Controllers Manual Tune Procedures TNPC01. Language Undefined File: PID Controllers Manual Tune Procedures TNPC01. pdf. Product Spotlight. Graphite Platform; Tuning a PID Controller is important for Heat treatment processes to demonstrate the need for (PID) control. To guarantee consistent product quality, the temperature within a furnace or oven