Visualization in Java, the performance of control system, based on fuzzy inference system, with a front-end built in Visual Basic

The paper presents a technique to visualize the performance of a control system fine-tuned by fuzzy inference. The control problem picked for this paper is the problem of controlling the swing of a crane when it is in motion. The conventional model for controlling the swing in cranes is based on differential equations or discrete transforms and is unable to control the swing within the acceptable range. The mathematical model of the problem is implemented in Simulink. The fuzzy model for the crane control is developed and then embedded in Simulink. The fuzzy model is fine tuned to reduce the swing of the crane. The output of the Simulink model is the power supplied to the motor of the crane. For the visualization of the crane swing in runtime, a Java applet has been designed which is interfaced with the Simulink model to give the animation effect on the screen. The applet could be run using any Internet browser. The performance of the system is tested for the entire range of input parameters. The input parameters are the angle of the swing of the crane and the distance remaining to be traveled. A front end in Visual Basic is developed for the fuzzy inference system to facilitate the user not familiar with fuzzy technology.