Dynamic analysis of closed loop hydraulic system with 5/3 way custom valve using PID controller

This project deals with dynamic analysis of hydraulic unit by matlab simulation. It directly relates with machine response of the various component. In the case of the hydraulic systems, which are discussed in this paper, the actual input is some kind of prime mover such as an internal combustion engine or an electrical motor. The speed and torque of the prime mover is converted to the hydraulic power parameters at the pump, the directional control of the hydraulic power is provided by a valve, while the output can be the force and velocity of the double acting cylinder. To analyze piston rod displacement, pressure and force acting in the system. Dealing with complicated system which contain customized valve, power supply unit and PID controller. The hydraulic system is described mathematically in preparation for modeling. At first, the model with high degree of detail, but their non-linear character is created. The linear model which used in design of an appropriate control system which enables the accurate control of velocity, force and pressure of the system. An input signal of sine wave to pass through the actuating device of customized valve. Using closed loop control system with PID regulation, which is used to tune the performance of system along the transfer function of system. One of the complicated task taken in this part, design and performance of the high response servo valve (Moog D661). And it is tuned by PID controller with appropriate parameters. The principle of closed loop hydraulic system was analyzed and the total pressure control valve was discussed in detail. There are two methods were used to compute the whole system natural frequency based on building hydraulic system model in frequency domain. The other is Laplace transform method in which we got the relationship between the whole system and every part’s of natural frequencies. So, our final result to determine the transfer function of the closed loop of hydraulic system.