Composite nonlinear feedback based discrete integral sliding mode controller for uncertain systems |
| |
Authors: | Sanjoy Mondal Chitralekha Mahanta |
| |
Institution: | Department of Electronics and Electrical Engineering, Indian Institute of Technology Guwahati, Guwahati 781039, India |
| |
Abstract: | In this paper, a discrete integral sliding mode (ISM) controller based on composite nonlinear feedback (CNF) method is proposed. The aim of the controller is to improve the transient performance of uncertain systems. The CNF based discrete ISM controller consists of a linear and a nonlinear term. The linear control law is used to decrease the damping ratio of the closed-loop system for yielding a quick transient response. The nonlinear feedback control law is used to increase the damping ratio with an aim to reduce the overshoot of the closed-loop system as it approaches the desired reference position. It is observed that the discrete CNF-ISM controller produces superior transient performance as compared to the discrete ISM controller. The closed-loop control system remains stable during the sliding condition. Simulation results demonstrate the effectiveness of the proposed controller. |
| |
Keywords: | Discrete control Integral sliding mode control Composite nonlinear feedback Nonlinear function |
本文献已被 ScienceDirect 等数据库收录! |