Air Pneumatic Suspension System (APSS)

A linear analytical model of a ground-vehicle suspension system employing a pneumatic isolator and a three-way servovalve is developed. Damping is provided by connecting the pneumatic spring to a constant-volume surge tank through capillary resistances. Non-dimensional dynamic equations for the valve-controlled, self-damped, pneumatic isolator are derived and the effects of various feedback and feedforward controls on the performance of the closed-loop system are pointed out. Experiments are conducted to verify the validity of the assumptions made in deriving the absolute and relative displacement transmissibilities and the vehicle model is simulated on an analogue computer. It is shown that a servovalve-controlled pneumatic suspension system not only considerably reduces the body transmissibility at very low frequencies, but is also capable of very good isolation throughout the broad frequency range.

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Modeling and Dynamic Analysis of a Novel Hydro-Pneumatic Suspension System

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.772.188 ◽

2015 ◽

Vol 772 ◽

pp. 188-191

Author(s):

L. Yang ◽

Fan Yang ◽

M.B. Xia

Keyword(s):

Dynamic Analysis ◽

Mass Conservation ◽

Suspension System ◽

Force Balance ◽

Optimization Approach ◽

The Novel ◽

Good Match ◽

Pneumatic Suspension ◽

Simulation Results ◽

Gas Chamber

This study presents a modeling procedure and dynamic analysis for a novel hydro-pneumatic suspension system, in which the gas chamber has been integrated into the main structures. The modeling of the novel hydro-pneumatic suspension system has been established based on the mass conservation and force balance and the dimension has been obtained through a design optimization approach. The simulation results of the established model have been compared with those obtained through ADAMS, and good match can be observed.

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A new pneumatic suspension system with independent stiffness and ride height tuning capabilities

Vehicle System Dynamics ◽

10.1080/00423114.2012.660167 ◽

2012 ◽

Vol 50 (12) ◽

pp. 1735-1746 ◽

Cited By ~ 15

Author(s):

Zhihong Yin ◽

Amir Khajepour ◽

Dongpu Cao ◽

Babak Ebrahimi ◽

Konghui Guo

Keyword(s):

Suspension System ◽

Ride Height ◽

Pneumatic Suspension

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Technical Note: A two-degree-of-freedom ambulance stretcher suspension: Part 3: Laboratory and road test performance

Proceedings of the Institution of Mechanical Engineers Part D Journal of Automobile Engineering ◽

10.1243/0954407981526055 ◽

1998 ◽

Vol 212 (5) ◽

pp. 401-407 ◽

Cited By ~ 1

Author(s):

R. J. Henderson ◽

J. K. Raine

Keyword(s):

Test Performance ◽

Natural Frequencies ◽

Low Cost ◽

Mechanical Systems ◽

Technical Note ◽

Suspension System ◽

Degree Of Freedom ◽

Road Test ◽

Pneumatic Suspension ◽

Two Degree Of Freedom

Parts 1 and 2 of this paper gave a design overview and described the dynamics of a prototype two-degree-of-freedom pneumatic suspension for an ambulance stretcher. This concluding part briefly reviews laboratory shaker table and ambulance road test performance of the suspension with passive pneumatic damping. The suspension system is found to offer compact low-cost isolation with lower natural frequencies than achieved in earlier mechanical systems.

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PRELIMINARY INVESTIGATIONS OF A NEW ACTIVE ELECTRO-PNEUMATIC SUSPENSION SYSTEM

Vehicle System Dynamics ◽

10.1080/00423119808969580 ◽

1998 ◽

Vol 29 (sup1) ◽

pp. 479-484

Author(s):

G. J. STEIN

Keyword(s):

Suspension System ◽

Pneumatic Suspension

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Study on Nonlinear Damping Properties of Hydro-Pneumatic Suspension System for XP302-Pneumatic Tyred Roller

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.945-949.987 ◽

2014 ◽

Vol 945-949 ◽

pp. 987-991

Author(s):

Bang Sheng Xing ◽

Ning Ning Wang ◽

Le Xu

Keyword(s):

Dynamic Performance ◽

Nonlinear Damping ◽

Suspension System ◽

Nonlinear Stiffness ◽

Damping Properties ◽

Vehicle Dynamic ◽

Nonlinear Mathematical Model ◽

Computer Simulation Program ◽

Pneumatic Suspension ◽

Stiffness And Damping

The nonlinear stiffness and damping properties of the hydro-pneumatic suspension system are introduced, and the nonlinear mathematical model of it is established. Using MATLAB 2009b to establish the computer simulation program and draw out the nonlinear stiffness curve and damping properties curve of the hydro-pneumatic suspension system. Then, researching the influences of related parameters' changes on the nonlinear stiffness and damping properties of the hydro-pneumatic suspension system. The simulation of vehicle dynamic performance research's foundation is provided.

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