Design of Robust Control System for Paint and Coating Process

Paint & Coating industries have displayed a significant role in a variety of areas e.g. aerospace, construction, and automotive applications. However, a big challenge that has been associated with this process is the precise control of coating process for ensuring high-quality finishes maintaining consistent uniformity and thickness. The conventional control strategies can’t give promising results due to uncertainties and nonlinearities existing in these processes. This research is exploring the potential of H infinity control in enhancing the performance and robustness of control system for a considered second-order paint & coating process model. For this model, a conventional PID controller, and a H-infinity based controller have been designed using MATLAB. The improvement in the control performance by H -infinity technique has been highlighted by comparing it with the conventional PID control system in terms of various time domain and frequency domain parameters.