How can I choose the best PID controller?
The selection of the best proportional integral derivative (PID) controller will depend on your specific needs. The PID controller can be in the form of a PI or PD controller, or just I or P. Not all applications require the use of all three parameters. The control of the derivative is most likely to be eliminated because it performs measurements based on the system noise. Eliminations can be done by setting unwanted parameters to zero. Calculation calculations are made by taking it as a result of the difference between the measured amount and the required amount. Errors are minimized by setting inputs to the control system.
In PID controller, any proportional changes that are too large if the same changes are too small, the system will not respond. Integral check measures the amount of error and attempts to minimize it. Derivative control elements reduce the speed of change, but may slow the response time and introduce more noise into the system.
In order to understand the steering process, a good example is manually adjusting the water temperature on the two-TAP faucet. Both hot and cold water are on and then modified by the user to the desired combined temperature. The modifications must be made exactly or the user will go back and forth between water that is too hot or too cold. Complete proportional controls eliminate cycling and shutdown in the system. When changes in the system are scanned, the PID controller automatically compensates.
The simplest control systems can be used for basic thermostat systems. PID controller in the oven can best work with only proportional and integral controls. The derivative function could cause irregular changes from noise or electrical interference. The control allows the functioning of the functioning properly to heat to the desired temperature and then cycles and off to maintain it. Heating is slowed when the oven reaches the desired temperature to prevent the transition over the seta point.
The basic controls for turning on and off are in systems that do not require constant accurate temperatures. This can use the home and cooling units, but better efficiency will be achieved using a proportional or PID driver. Industrial uses usually require constant control for laboratory use. Motion, temperature and flow control requirements can be met with PID functions. If the critical error is in steady state (SSE), the desired result will provide all three controls - cooperation.
Factors that need to be considered are the type of system input sensor and the permitted range of results. Next, the need for output must be met. Outputs can be electromechanical relays, analog receiver or a fixed relay (SSR). Finally, take into account the number of outputs. PID controllers usually come up with a list of all types of inputs and outputs that work best.