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access icon free Real-time estimation and prediction of lateral stability of coaches: a hybrid approach based on EKF, BPNN, and online autoregressive integrated moving average algorithm

© The Institution of Engineering and Technology
Received 25/06/2020, Accepted 09/12/2020, Revised 07/11/2020, Published 14/12/2020

This study aimed to develop a coach state estimation and prediction system to enhance driving safety. Different from existing vehicle stability estimation studies, the authors propose a hybrid method to estimate and predict the state of a coach in real time. First, the vehicle sideslip angle and yaw rate are estimated by a three-degrees-of-freedom vehicle model combined with an extended Kalman filter (EKF) estimation algorithm. Then, a steering system is established that replaces the front-wheel angle with the steering wheel input torque. Next, a seven-degrees-of-freedom vehicle model analyses the effects of various driving influencing factors on the vehicle sideslip angle and the boundary of the stable region of the phase plane of the vehicle sideslip angle rate, and a boundary value parameter database is obtained. A back propagation neural network (BPNN) model is then established to obtain the boundary function parameter values under multifactor coupling conditions. Furthermore, an online prediction of the steering wheel input torque in a time series is done, and the prediction value is input to the steering system and neural network model. The effectiveness of the proposed method was evaluated via simulations based on MATLAB/Simulink and TruckSim software.

Inspec keywords: road vehicles; stability; vehicle dynamics; nonlinear filters; time series; neural nets; steering systems; wheels; autoregressive moving average processes; Kalman filters; backpropagation; state estimation; road safety

Other keywords: front-wheel angle; boundary value parameter database; steering system; time estimation; steering wheel input torque; boundary function parameter values; yaw rate; hybrid approach; vehicle sideslip angle rate; seven-degrees-of-freedom vehicle model analyses; propagation neural network model; prediction value; driving safety; time series; EKF; vehicle stability estimation studies; driving influencing factors; BPNN; extended Kalman filter estimation algorithm; coach state estimation; prediction system; online prediction; online autoregressive integrated moving average algorithm; three-degrees-of-freedom vehicle model; hybrid method

Subjects: Road-traffic system control; Other topics in statistics; Vehicle mechanics; Other topics in statistics; Mechanical components; Neural computing techniques

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