Active and Passive Suspension System Performance under Random Road Profile Excitations

Abstract

Passive suspensions are designed to satisfy the conflicting criteria of riding comfort and vehicle handling. An active suspension system attempts to overcome these compromises to provide the best performance for vehicle control. Different types of mathematical models have been used to study the suspension system of a vehicle. The quarter vehicle model is used for initial investigation. Later, the half vehicle and full vehicle models are used for the study, which is closer to the actual model of a vehicle suspension. In this paper, the behavior of a suspension system is analyzed using the full vehicle model. In the current work, the dynamic equation and their state-space formulation are presented for the full vehicle model to understand the system prior to the controller design. The open-loop response of the full vehicle suspension system, when subjected to various road excitations, is also studied. The procedure of modeling a SIMULINK model for passive suspensions system is discussed in detail. Design of the simple Proportional Integral Derivative (PID) feedback and feed-forward controller is presented for the active suspension system using transfer functions. Closed-loop transfer functions are also derived and their responses are plotted. To analyze the rollover behavior simulation for cornering is also performed in the current study.

Comparison study for double passive car suspension system through mathematical modelling and experimental work

“…The dispersion models namely, the standard deviation and mean were employed to evaluate the data accuracy either convergent or divergent type and also to find out the stability of the data. A small value for the standard deviation was indicated that the value tended to be close to the mean [24]. In this study, the standard deviation produced by the experimental work was 0.01 while the standard deviation from the mathematical modelling was 0.005.…”

“…Different suspension systems were fulfilled the constraint of an energy efficiency using various approaches [23]. The quarter vehicle model was used as an initial investigation, in which the model was closely resembled the actual model of the car [24]. Ride safety and the handling capabilities of the vehicle are mainly determined by the suspension system which transmit the forces between the vehicle and the road.…”

Optimization of Nonlinear Passive Suspension System to Minimize Road Damage for Heavy Goods Vehicle

“…The suspension system works as the essential interface between the vehicle and the road. 8,9 The design of an automobile vehicle suspension has been the subject of research for a long time. Generally speaking, a decent suspension must provide a comfortable ride and good vehicle handling within a reasonable range of suspension deflection.…”

Modernization of spring suspension of trailed vehicles

“…Comparing the design of spring suspension not only for tractor, but also for automobile trailers, both domestic and foreign, it can be seen that the overwhelming majority of them consist of leaf springs [6]. Despite their simplicity of design and efficiency of use, they have significant disadvantages such as -high metal consumption and rigidity, high labor intensity during repair work, relatively high cost [7]. At the same time, in the practice of this direction in mechanical engineering, not only leaf springs are used as spring suspension, but also helical compression springs, pneumatic and torsion springs.…”