A101 Multiple Electrostatic Suspension Systems : 4th report: Experimental study on dynamic characteristics of a double suspension system

2011 ◽  
Vol 2011.12 (0) ◽  
pp. 19-22
Author(s):  
Takaaki KATO ◽  
Takashi MIZUNO ◽  
Masaya TAKASAKI ◽  
Yuji ISHINO
Keyword(s):  
Experimental Study ◽  
Dynamic Characteristics ◽  
Suspension System ◽  
Suspension Systems

scholarly journals DYNAMIC CHARACTERISTICS OF NON-SMOOTH SUSPENSION SYSTEM UNDER FRACTIONAL-ORDER DISPLACEMENT FEEDBACK

10.6036/10125 ◽  
2021 ◽  
Vol 96 (3) ◽  
pp. 322-328
Author(s):  
JIANCHAO ZHANG ◽  
Zhan Chen ◽  
Jun Wang ◽  
Yufei Hu
Keyword(s):  
Feedback Control ◽  
Analytical Solution ◽  
Fractional Order ◽  
Dynamic Characteristics ◽  
Harmonic Excitation ◽  
Suspension System ◽  
Vehicle Body ◽  
Dynamic Behaviors ◽  
Integer Order ◽  
Suspension Systems

Vehicle suspension systems generally have non-smooth factors, such as clearances, collision, and constraint. The bad dynamic behaviors caused by these non-smooth factors have not been controlled effectively, thus influencing the driving performance and riding comfort of vehicles. To explore the dynamic characteristics of non-smooth suspension systems for controlling the bad dynamic behaviors, an approximate analytical solution to the response of a two-degree of freedom nonlinear suspension system, which has a fractional-order displacement feedback under harmonic excitation, was deduced by the Krylov–Bogoliubov (KB) method. This analytical solution was verified by the numerical solution of the suspension system. Moreover, the response of the suspension system with fractional-order displacement feedback control was compared with those of the systems without feedback control and traditional integer-order control. The influences of the main parameters of the system on the dynamic suspension characteristics were analyzed thoroughly. Finally, the stability of the suspension system was analyzed by plotting the maximum Lyapunov index diagram. Results show that compared with the systems without feedback control and with traditional integer-order control, the nonlinear suspension system with fractional-order displacement feedback control can significantly improve vehicle acceleration, the dynamic deflection of the suspension, and the displacement of the vehicle body. Controlling the nonlinear stiffness coefficient of the suspension system within 103–106 is conducive to decreasing the dynamic deflection of the suspension system of vehicles, while increasing the fractional-order control coefficient and the fractional order is beneficial to controlling the dynamic deflection of the suspension system and the displacement of the vehicle body. Conclusions obtained in the study can provide unique references for the optimal design and control of nonlinear suspension systems with fractional-order displacement feedback control. Keywords: suspension; non-smooth; fractional order; dynamics; analytical solution; nonlinear.

scholarly journals Experimental Study on Static and Dynamic Characteristics of Annular Plain Seals With Porous Materials.

1997 ◽  
Vol 63 (605) ◽  
pp. 1-9
Author(s):  
Satoru KANEKO ◽  
Hideharu KAMEI ◽  
Yukinobu YANAGISAWA ◽  
Hideo KAWAHARA ◽  
Nobutaka YAMAGUCHI
Keyword(s):  
Experimental Study ◽  
Porous Materials ◽  
Dynamic Characteristics ◽  
Static And Dynamic Characteristics

scholarly journals Online Adaptive Optimal Control of Vehicle Active Suspension Systems Using Single-Network Approximate Dynamic Programming

2017 ◽  
Vol 2017 ◽  
pp. 1-9 ◽  
Author(s):  
Zhi-Jun Fu ◽  
Bin Li ◽  
Xiao-Bin Ning ◽  
Wei-Dong Xie
Keyword(s):  
Optimal Control ◽  
Dynamic Programming ◽  
Approximate Dynamic Programming ◽  
Control Method ◽  
Active Suspension ◽  
Suspension System ◽  
Lyapunov Theory ◽  
Adaptive Optimal Control ◽  
Suspension Systems ◽  
Optimal Control Method

In view of the performance requirements (e.g., ride comfort, road holding, and suspension space limitation) for vehicle suspension systems, this paper proposes an adaptive optimal control method for quarter-car active suspension system by using the approximate dynamic programming approach (ADP). Online optimal control law is obtained by using a single adaptive critic NN to approximate the solution of the Hamilton-Jacobi-Bellman (HJB) equation. Stability of the closed-loop system is proved by Lyapunov theory. Compared with the classic linear quadratic regulator (LQR) approach, the proposed ADP-based adaptive optimal control method demonstrates improved performance in the presence of parametric uncertainties (e.g., sprung mass) and unknown road displacement. Numerical simulation results of a sedan suspension system are presented to verify the effectiveness of the proposed control strategy.

scholarly journals Modelling and Sensitivity Analysis of Influencing Parameters in Displacement of Dynamic Bodies

2021 ◽  
Vol 06 (05) ◽  
Author(s):  
Yokesh K.S ◽  
Keyword(s):  
Dynamic Characteristics ◽  
Vertical Displacement ◽  
Suspension System ◽  
Damping Coefficient ◽  
Vehicle Body ◽  
Dominant Factor ◽  
Spring Stiffness ◽  
Variation Of Parameters ◽  
Important Challenge ◽  
Influencing Parameters

The mathematical modelling in relation to the Six-degree freedom system of train suspension is developed and simulated for their dynamic characteristics. The important challenge in the suspension system is vertical displacement obtained from the vehicle body. To reduce vertical displacement, an analysis of the model is done by variation of parameters such as stiffness of spring and damping coefficient. The model has been created by deriving the equations of a system using Newton’s law. The developed model has the potential to analyse the dynamic characteristics of the suspension system for both displacement of the vehicle body and displacement of the wheel. The outcome of this research revealed that Secondary spring stiffness is the most dominant factor to influence the displacement of the vehicle body; Primary damping coefficient is the most dominant factor to influence displacement of the wheel.

scholarly journals THE DYNAMIC CHARACTERISTICS OF VEHICLE SUSPENSION SYSTEMS WITH OPTIMAL DAMPING

2015 ◽  
Vol 23 (03) ◽  
pp. 93-96
Author(s):  
Sergey Sergeevich Vorobyev ◽  
◽  
Sergey Aleksandrovich Vorobyev ◽  
Andrey Stanislavovich Reshenkin ◽  
Roman Aleksandrovich Goncharov ◽  
...  
Keyword(s):  
Dynamic Characteristics ◽  
Vehicle Suspension ◽  
Suspension Systems ◽  
Optimal Damping
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