Traction control using a throttle valve based on sliding mode control and load torque estimation

Abstract

The purpose of an engine-controlled traction control system (TCS) is to regulate engine torque in order to keep the driven wheel slip in a desired range. Engine torque can be regulated by a throttle valve. In this paper, the engine-controlled TCS based on an engine model and estimated load torque by a Luenberger observer is proposed. For this control scheme, the engine model is required for a model-based controller design using sliding mode control. The engine torque controller determines the throttle angle for maintaining the desired manifold pressure to generate engine torque corresponding to the desired wheel torque. Since the load torque is composed of multiple external sources such as friction force, drag force, mechanical losses, and others, load torque estimation is required. The simulation results to various manoeuvres during slippery and split road conditions have showed better acceleration performance and stability of the vehicle with TCS. In addition, the load torque observer has estimated real load torque with little error.

Coordinated traction control of on-demand four-wheel-drive vehicles under complex start-up situation

“…The classic tire force observer is used to produce an approximate estimation of the tire force. 10,13 Formula (2) shows the detail of the observer.…”

“…The ADRC design step consists of the extended state observer design and the nonlinear controller design. 24 During the ADRC design process, any system is assumed as the standard single input single output (SISO) form as shown in formula (10).…”

Control of electronic throttle valve using model predictive control

“…The gear ratio of the intermediate gear to the pinion gear is defined as K g1 =N p /N intl , and that of the sector gear to the intermediate gear is defined as K g2 = N ints /N sect . [4]. It can be described as:…”

“…So, external or internal conditions do not affect the desired angle of valve plate. The opening of this throttle valve is done by electronic computing module [1][2][3][4][5].…”

Design of a networked traction control system using a real-time operating system

“…The traction controller is designed as a two-level controller that uses a sliding-mode control method to decide the desired throttle angle for maintaining the desired slip [14]. In this study, a desired slip of 0.125 was used.…”