Simulator of Water Tank Level Control System Using PID-Controller

摘要

The difficulty of a Water Tank Level Control System (WTLCS) is often operates under unstable condition such as above setpoint level or below setpoint level. The unstable condition normally contributes to damage of devices and equipments of a process plant. However, this problem can be solved by introducing feedback controller by visualizing it using interactive simulator. One of the feedback controller is a Proportional (P) controller. Nonetheless, the P controller has drawbacks to control the non-linearity of a water level. The aim of this paper is to present the implementation of a PID controller to control virtual WTLCS. The P controller and PID controller is implemented in a WTLCS virtual model which has been developed using Microsoft Visual Basic 6.0 (VB). The both P and PID controller have been compared. The simulation result shows that the PID controller gives better control system response as compared to P controller.