| Popis: |
Hydraulic press is a machine using a hydraulic cylinder to generate a compressive force to perform various pressing operations like metal forging, punching, stamping, etc. When the cylinder's extension force is controlled, the machine can be employed for pressing operations on different materials with ease. The control problem is posed to achieve flexibility in the machine. Mathematical model describes the behaviour of the system in terms of mathematical equations and logical models. The steps for modelling of hydraulic press using system identification technique in MATLAB are discussed in this paper. Using this model, three controllers' viz., PID controller, Internal model controller and Fractional order controller are developed and their responses are compared. The result showed that Fractional order controller gives better response than the other two with faster settling time and smaller peak overshoot, thus helps in designing a more appropriate controller for controlling the cylinder's extension force. |
