Height and Leveling Control of Automotive Air Suspension System Using Sliding Mode Approach

Electronically controlled air suspension systems have been used in vehicles to improve ride comfort and handling safety by adjusting vehicle height. This paper proposes a new nonlinear controller to adjust the height of the vehicle sprung mass (height control) and to regulate the roll and pitch angl...

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Bibliographic Details
Published in:IEEE transactions on vehicular technology 2011-06, Vol.60 (5), p.2027-2041
Main Authors: KIM, Hyunsup, LEE, Hyeongcheol
Format: Article
Language:English
Subjects:
Air spring
air suspension
Applied sciences
Atmospheric modeling
Automobiles
Automotive engineering
Control algorithms
Control systems
Control theory
Dynamical systems
Electrical engineering. Electrical power engineering
Electrical machines
Equations
Exact sciences and technology
height control
leveling control
Mathematical model
Nonlinear dynamics
Nonlinearity
pneumatic system
Product design
Regulation and control
sliding mode control (SMC)
sliding mode observer
Suspension systems
Suspensions
Valves
Vehicles
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Summary:Electronically controlled air suspension systems have been used in vehicles to improve ride comfort and handling safety by adjusting vehicle height. This paper proposes a new nonlinear controller to adjust the height of the vehicle sprung mass (height control) and to regulate the roll and pitch angles of the vehicle body (leveling control) by an air suspension system. A sliding mode control algorithm is designed to improve the tracking accuracy of the control and to overcome nonlinearities and uncertainties in the air suspension system. A mathematical model of the air suspension system is formulated in a nonlinear affine form to describe the dynamic behavior of the system and to derive the control algorithm. The sliding mode observer is also designed to estimate the pressures inside four air springs. The effectiveness and performance of the proposed control algorithm are verified by simulations and actual vehicle tests.
ISSN:0018-9545
1939-9359
DOI:10.1109/TVT.2011.2138730