A New Suspension with Annular Vibration Absorption Mechanism for Double Time-Delay Feedback Control

Purpose This paper aims to reduce the body vibration, improve the ride comfort, driving safety, and handling stability of the vehicle, proposes a new type of suspension with an annular vibration-absorbing structure, and uses this new type of suspension as the research object and double time-delay feedback control as the control method to study the effect on body vibration reduction. Methods This paper introduces the modeling of a new suspension with an annular vibration-absorbing structure with double time-delay feedback control, uses the particle swarm optimization (PSO) method to optimize the parameters of the suspension and the parameters of the double time-delay feedback control, further use the Routh-Hurwitz criterion to derive the full time-delay stability region of the system, and uses the frequency domain scanning method to determine the optimal time-delay feedback control parameters are in the stability region of the system, illustrating the effectiveness of the optimal time-delay feedback control parameters is illustrated. Finally, the system is simulated numerically using Matlab/Simulink. Results With both simple harmonic and random excitation, the root mean square (RMS) values of body acceleration (BA) and tire dynamic displacement (TDD) of the new suspension with double time-delay feedback control are significantly reduced. Conclusion The results show that the new suspension with an annular vibration-absorbing structure proposed in this paper can reduce the vibration of the body. And the double time-delay feedback control based on this new suspension has an obvious effect on improving the overall performance of the vehicle.