Effects of sliding surface on the performances of adaptive sliding mode slip ratio controller for a HEV

Abstract

Effects of sliding surface on the performances of adaptive sliding mode slip ratio controller for a HEV BASANTA KUMAR DASH and BIDYADHAR SUBUDHI Slip ratio control of a ground vehicle is an important concern for the development of antilock braking system (ABS) to avoid skidding when there is a transition of road surfaces. In the past, the slip ratio models of such vehicles were derived to implement ABS. It is found that the dynamics of the hybrid electric vehicle (HEV) is nonlinear, time varying and uncertain as the tire-road dynamics is a nonlinear function of road adhesion coefficient and wheel slip. Sliding mode control (SMC) is a robust control paradigm which has been extensively used successfully in the development of ABS of a HEV. But the SMC performance is influenced by the choice of sliding surface. This is due to the discontinuous switching of control force arising in the vicinity of the sliding surface that produces chattering. This paper presents a detailed study on the effects of different sliding surfaces on the performances of sliding mode based adaptive slip ratio control applied to a HEV.

Slip Control of Electric Vehicle Based on Tire‐Road Friction Coefficient Estimation

“…Optimal slip control on braking can reduce braking distance, save braking energy, and enhance the vehicle stability. For these purposes, various methods have been used in slip control, such as sliding mode control [2], robust control [3], and fuzzy control [4]. However, most of these studies are done with the road adhesion coefficient known.…”