H ∞ and μ -synthesis Design of Quarter Car Active Suspension System
Researcher Journal, 12 (2):
51-62 (February 2020)DOI: 10.7537/marsrsj120220.07
Abstract
To improve the road handling and passenger comfort of a vehicle, a
suspension system is provided. An
active suspension system is considered to be better than the passive
suspension system. In this paper, 2 degrees of
freedom of a linear quarter car active suspension system is designed,
which is subject to different disturbances on
the road. Since the parametric uncertainty in the spring, the shock
absorber, mass and the actuator has been
considered, robust control is used. In this paper, H ∞ and μ- synthesis
controllers are used to improve the driving
comfort and the ability to drive the car on the road. For the analysis
of the time domain, using a MATLAB script
program and performed a test using four disturbance inputs of the
road (bump, random, sinusoidal and harmonic) for
the suspension deflection, the acceleration of the body and the body
travel for the active suspension with the H ∞
controller and active suspension with μ- synthesis controller and
the comparative simulation and reference results
demonstrate the effectiveness of the presented active suspension system
with μ- synthesis controller.