This paper formulates the active suspension control problem as disturbance attenuation problem with output and control constraints. The performance is used to measure ride comfort such that more general road disturbances can be considered, while time-domain hard constraints are captured using the concept of reachable sets and state-space ellipsoids. Hence, conflicting requirements are specified separately and handled in a nature way. In the framework of Linear Matrix Inequality (LMI) optimization, constrained active suspensions are designed on half-car models with and without considering actuator dynamics. Analysis and simulation results show a promising improvement on ride comfort, while keeping suspension strokes and control inputs within bounds and ensuring a firm contact of wheels to road.
Issue Section:
Technical Papers
Keywords:
Active Suspensions,
Time-Domain Constraints,
LMI Optimization,
Actuator Dynamics,
suspensions (mechanical components),
state-space methods,
mechanical contact,
wheels,
vibration control,
automobiles
Topics:
Actuators,
Design,
Dynamics (Mechanics),
Optimization,
Roads,
Suspension systems,
Wheels,
Robustness
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