scholarly journals Preview control of vehicle suspension system featuring MR shock absorber

2009 ◽  
Vol 149 ◽  
pp. 012079 ◽  
Author(s):  
M S Seong ◽  
S B Choi ◽  
M W Cho ◽  
H G Lee
Keyword(s):  
Shock Absorber ◽  
Suspension System ◽  
Vehicle Suspension ◽  
Preview Control ◽  
Vehicle Suspension System

Optimal Active Control of Vehicle Suspension System Including Time Delay and Preview for Rough Roads

2002 ◽  
Vol 8 (7) ◽  
pp. 967-991 ◽  
Author(s):  
Javad Marzbanrad ◽  
Goodarz Ahmadi ◽  
Yousef Hojjat ◽  
Hassan Zohoor
Keyword(s):  
Ride Comfort ◽  
Three Dimensional ◽  
Suspension System ◽  
Road Surface ◽  
Vehicle Suspension ◽  
Control Force ◽  
Preview Control ◽  
The Road ◽  
Road Surface Roughness ◽  
Vehicle Suspension System

An optimal preview control of a vehicle suspension system traveling on a rough road is studied. A three-dimensional seven degree-of-freedom car-riding model and several descriptions of the road surface roughness heights, including haversine (hole/bump) and stochastic filtered white noise models, are used in the analysis. It is assumed that contact-less sensors affixed to the vehicle front bumper measure the road surface height at some distances in the front of the car. The suspension systems are optimized with respect to ride comfort and road holding preferences including accelerations of the sprung mass, tire deflection, suspension rattle space and control force. The performance and power demand of active, active and delay, active and preview systems are evaluated and are compared with those for the passive system. The results show that the optimal preview control improves all aspects of the vehicle suspension performance while requiring less power. Effects of variation of preview time and variations in the road condition are also examined.

scholarly journals Numerical simulation of shock absorbers heat load for semi-active vehicle suspension system

2016 ◽  
Vol 20 (5) ◽  
pp. 1725-1739 ◽  
Author(s):  
Miroslav Demic ◽  
Djordje Diligenski
Keyword(s):  
Dynamic Simulation ◽  
Heat Dissipation ◽  
Shock Absorber ◽  
Suspension System ◽  
Heat Energy ◽  
Vehicle Suspension ◽  
Shock Absorbers ◽  
Simulation Based ◽  
Vehicle Suspension System ◽  
Active Vehicle Suspension System

Dynamic simulation, based on modelling, has a significant role during to the process of vehicle development. It is especially important in the first design stages, when relevant parameters are to be defined. Shock absorber, as an executive part of a semi-active suspension system, is exposed to thermal loads which can lead to its damage and degradation of characteristics. Therefore, this paper attempts to analyze a conversion of mechanical work into heat energy by use of a method of dynamic simulation. The issue of heat dissipation from the shock absorber has not been taken into consideration.

Modeling an Active Vehicle Suspension System With Application of Digital Displacement Pump Motor

2008 ◽  
Author(s):  
Xubin Song
Keyword(s):  
Control Strategy ◽  
Shock Absorber ◽  
Active Suspension ◽  
Suspension System ◽  
Vehicle Suspension ◽  
Damping Force ◽  
Independent Components ◽  
Displacement Pump ◽  
Vehicle Suspension System ◽  
Active Vehicle Suspension System

Vehicle suspension design can be simplified by using compressible fluid (CF) based struts. One single CF strut can provide both spring and damping force instead of two independent components of spring and shock absorber in a traditional vehicle suspension system. With the application of a digital displacement pump motor (DDPM) to modulate the fluid amount in CF struts, a hydraulic based active suspension can be developed. Each vehicle suspension corner (i.e., CF strut) can be linked to (at least) one cylinder of a multiple cylinder DDPM. Each cylinder has two poppet valves to allow exchanging flow between strut and accumulator. Those valves are actively controlled according to a properly designed control strategy. Thus DDPM can regulate the fluid flow to/from the CF struts to create a desired strut force at each suspension corner. This paper focuses on elaborating this novel active suspension using CFS and DDPM, and then presents a model that can well capture the macro-behavior of this new active suspension.

Magnetorheological damper in semi-active vehicle suspension system using SDRE control for a quarter car model

2018 ◽  
Author(s):  
Maria Aline Gonçalves ◽  
Rodrigo Tumolin Rocha ◽  
Frederic Conrad Janzen ◽  
José Manoel Balthazar ◽  
Angelo Marcelo Tusset
Keyword(s):  
Suspension System ◽  
Magnetorheological Damper ◽  
Vehicle Suspension ◽  
Quarter Car Model ◽  
Car Model ◽  
Quarter Car ◽  
Vehicle Suspension System ◽  
Active Vehicle Suspension System
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