
22 Magnetorheological Fluid Technology: Applications in Vehicle Systems
input response that the required control input determined from the skyhook
controller is applied during the rebound motion, while no magnetic eld is
applied during the jounce motion.
2.3 PID Control
An attractive controller to achieve desired damping force using MR damper
system is a proportional-integral-derivative (PID) controller. As is well
known, the PID controller is easy to implement in practice, and is very effec-
tive with robustness to system uncertainties. The control action of each P,
0 1 2 3 4 5
–500
0
500
1000
1500
Time (sec)
Desired
Controlled ...