Application of hybrid control algorithm on the vehicle active suspension system to reduce vibrations

Abstract

This research proposes a hybrid control algorithm to enhance smoothness in a vehicle’s motion. The control signal is synthesized from two separate controllers, Proportional Integral Derivative (PID) and Sliding Mode Control (SMC), to achieve superior control performance. The novelty of the proposed control algorithm lies in using a double-loop algorithm to determine the controller parameters. The algorithm proposed in this research involves two computational processes to determine the model’s optimal values including the raw value and the acceptable value. The proposed control algorithm has been simulated considering three specific cases corresponding to the three types of road stimuli. The results demonstrate that the values of sprung mass displacement and acceleration dropped considerably with the application of the proposed algorithm. Moreover, the change in vertical force at the wheel is also reduced with the application of the algorithm particularly in the third case where the vertical force at the wheel has reached to zero. The average values of vehicle body displacement are found to be 166.17 mm (for passive case), 54.20 mm (for PID), and 42.52 mm (for SMC). The proposed control algorithm managed to reduce this value to 8.95 mm as evidenced by simulation results. Finally, the response of the control system when subjected to an excitation signal from the road surface further demonstrates efficacy of the proposed hybrid control algorithm.

Improving stability and adaptability of automotive electric steering systems based on a novel optimal integrated algorithm

“…This combination provides stability for the system. This has been mentioned in Nguyen and Nguyen (2023b) and Nguyen et al . (2024).…”

“…This combination provides stability for the system. This has been mentioned in Nguyen and Nguyen (2023b) and Nguyen et al (2024). System performance is guaranteed based on the optimization of controller parameters.…”

Synthetic Optimization of Trafficability and Roll Stability for Off-Road Vehicles Based on Wheel-Hub Drive Motors and Semi-Active Suspension

“…Off-road vehicles and trucks, particularly those with high CG, were more likely to roll over and cause lethal accidents [23,24]. Simultaneously, in order to enhance the roll stability, responsiveness, and ride comfort of vehicles, some scholars have endeavored to integrate modern control technologies such as PID, backstepping control, sliding mode control, and fuzzy algorithms, with the aim of improving the maneuverability and safety of vehicles in complex road conditions [25,26].…”