Patent ID: 8672104

Claim:
A vibration dampening control system for controlling viscosity of a hydraulic vibration damper disposed between a support and an object having a bounce resonance frequency comprising; at least one mount defining a fluid chamber containing a fluid, a first accelerometer for disposition on the object generating a first acceleration signal, a second accelerometer for disposition on the support generating a second acceleration signal, a coil disposed on said at least one mount for generating a magnetic field in said fluid chamber to change viscosity of said fluid, a control device operably connected to said first and second accelerometers and said coil and receiving said first and second acceleration signals from said first and second accelerometers for determining a relative acceleration value in response to said first and second acceleration signals and generating a control signal of a predetermined current determined by said relative acceleration value for controlling said magnetic field generated by said coil, and characterized by said control device having at least one tunable parameter increasing said control signal above said predetermined current at a predetermined band of frequencies determined by the bounce resonance frequency.