Chattering reduction in step down converter using Robust reaching law

Abstract

The proposed robust reaching law for sliding mode control is used for chattering suppression, minimization of steady state error and reaching speed kept fast. With fine tuning parameters of robust reaching law, the system state reaches the sliding mode at the earliest. The mathematical analysis of the proposed reaching law is verifed. In one hand, they guarantee the system states reaches the sliding surface quickly and remain on it, in another way it deteriorate the chattering effectively, even unmatched certainties and disturbances. Such that the system response can better realize the unification of rapidity. A proposed reaching law applied to SMC DC-DC step down converter to analyse the chattering, it reduces the switching losses in the switching devices of the step down converter. In turn efficiency of the buck converter increases. MATLAB/Simulink results gives significant turn down of chattering and dynamic response of the system. This research work effectively improves the performance of the system.

Performance analysis of different methods for optimal sliding mode control of DC/DC buck converter

“…The simplicity and effectiveness in reaching the reference value was evaluated analytically by using MATLAB/Simulink software. According to Ningappa et al [24] a chattering was suppressed and steady state error was reduced with fast speed in a step down converter by implementing robust reaching law for SMC.…”