Stability Enhancement by Intelligence Algorithm

In our daily life the application of Control systems appear practically everywhere in ourhomes, in industry, in communications, information technologies, etc. PID controllers are themost widely-used type of controller for industrial applications. From the constructional point of view they are simple and exhibit robust performance over a wide range of operatingconditions. There are three main parameters involved are Proportional (P), Integral (I) and Derivative (D). The proportional part is responsible for following the desired set-point, whilethe integral and derivative part account for the build up of past errors and the rate of changeof error in the process respectively. As per law every system is not stable Increasing problems with process instability, nonlinearity,operating constraints, uncertainty time delay etc. have lead to development of more sophisticated control strategies. So there is always a continuous search for better techniques to maintain the stability of the system.