Design and comparisons of adaptive harmonic control for a quarter-car active suspension

Abstract

Car suspensions have the job to keep the tires in contact with the road surface as much as possible, to deliver steering stability with good handling and to guarantee passenger comfort. Most modern vehicles have independent front suspension and many vehicles also have independent rear suspension. Independent suspensions are preferred instead of dependent suspensions for their better ride handling, stability, steering and comfort but they provide less overall strength and a complex design which increases the cost and maintenance expenses for such a suspension. For this reason, automotive engineers struggle to discover new suspension components or advanced control solutions. Taking a step forward in this direction, the paper presents in the beginning one of the well-known mathematical models of a quarter-car active suspension. The obtained model is then implemented in a MATLAB/Simulink simulation which compares multiple control solutions. The only feedback considered for each control algorithm is the measurement of the body acceleration. Among these investigated control algorithms is the adaptive harmonic control solution proposed by this paper. The controller generates a harmonic control signal with variable amplitude and frequency based on the body acceleration feedback. The comparison analysis shows that the proposed control solution demonstrates quite good potential, generating in some cases better results than the other control algorithms.

Experimental implementation of a vehicle anti-lock brake system employing intelligent active force control with a P-type iterative learning algorithm

“…The system parameters are seen to be highly governed by road conditions that are typically varied and unpredictable; thus, the performance of the ABS cannot be seen as favorable all along. Furthermore, the signals of the sensors used in the ABS are constantly subject to noises and uncertainties (Emami and Akbarzadeh, 2003;Nichit xelea and Unguritu, 2022).…”

“…This controller controls the hydraulic modulator by estimating the vehicle velocity to calculate the slip ratio of the wheels in real time. Another ABS equipped with adaptive harmonic control (Nichiţelea and Unguritu, 2022) to provide a harmonic control signal based on the body acceleration that is variable in amplitude and frequency, as well as others utilized it with an intelligent algorithm using fuzzy logic has been implemented to a middle-class city bus (Ivanov et al, 2006). Guo et al (2014) applied an ABS to a quarter model of an electric vehicle through simulation work.…”

Particle swarm optimized fuzzy proportional-integral-derivative controller-based transverse leaf spring active suspension for vibration control

“…9,10 Active control forces are generated directly by hydraulic or electromagnetic actuators. 11 Compared with semi-active control, active control has stronger adaptability. 12 Therefore, this study investigates the feasibility and control effectiveness of semi-active and active control strategies based on the TLS suspensions based on a controllable damping force.…”

Stability analysis of the food delivery robot with suspension damping structure

“…The active adaptive suspension adapts to complex terrains by adjusting its own attitude, which is suitable for large and medium-sized unmanned vehicles; In comparison, the passive suspension structure is more suitable for smaller food delivery robots. Typical passive adaptive suspension structures include rocker-bogie suspension [16] , [17] , [18] , parallelogram suspension [19] , independent suspension [20] , [21] , and articulated rocker suspension [22] , [23] , [24] . In order to adapt to complex outdoor working environment, the existing suspension mechanism is comprehensively analyzed.…”