There are three sections of damping force, and they are background damping force of a fluid viscosity, electric damping force of applied electric field and pressure of gas.
With its particular performance, electrorheological fluid can be used as controllable damping media, which bring a promising way to research the semi-active engine mount system.
The dynamic properties of ER (electrorheological fluid), such as the damping force response and spectra of damping force, have been studied under the sinuous input excitation signal.