Tuning Of A PID With First-Order-Lag Controller Used With A Highly Oscillating Second-Order Process

Abstract High oscillation in industrial processes is something undesired and controller tuning has to solve this problems. PID with first-order-lag is a controller type of the PID-family which is suggested to overcome this problem. This research work has proven that using the PID is capable of solving the dynamic problems of highly oscillating processes but with less efficiency than other PID-based controller types. A second order process of 85.45 maximum overshoot and 8 seconds settling time is controlled using a PID controller with first-order-lag through simulation. The controller is tuned by minimizing the sum of square of error ISE of the control system using MATLAB. The MATLAB optimization toolbox is used assuming that the tuning problem is an unconstrained one. The result was reducing the overshoot from 85.45 to 15.9 and decreasing the settling time from 8 seconds to only 0.552 seconds. The performance of the control system using a PID with first-order-lag controller using the present tuning technique is compared with that using the ITAE standard forms tuning technique