Paper Title
An Optimal Controller Design of Electro Hydraulic Position Servo System using Ziegler-Nichols Method and Genetic Algorithm

Abstract
The Electrohydraulic Position Servo systems are one of the most useful systems in the field of engineering becausethese systems can be operated at very high power and the speed of the response is also very high. In comparison to other gadgets, the weight of these systems is very less. It has highly nonlinear dynamics and has a large extent of model uncertainties and external disturbances. Therefore, when we use a controller having linear characteristics with these servo systems it may be very difficult to control those systems. The tuning of the Electro Hydraulic Position Servo System using Ziegler-Nichols Method provides an excessive value of overshoot. Though the problems of the Ziegler-Nichols method can be resolved by using the Particle Swarm Optimization Method, still, it cannot solve the problems of settling time and rise time. Due to the excessive value of these parameters which is obtained after optimizing the system using the Particle Swarm Method, the production of the system becomes very slow. To solve these problems, this paper, uses Genetic Algorithm totune the PID controller to reduce the delay time and increase the efficiency of the process. The Genetic algorithm can resolve the Problems of the above-mentioned tuning methods which is why nowadays Genetic Algorithm is the most precise optimization method. Keywords - Electrohydraulic Position Servo System, Genetic Algorithm Method, Ziegler- Nichols Method, PID Controller.