Variable gain control in roll compensating seat

A seat system for a vehicle, comprising:

• a seat;
• a support structure coupled to the seat and including an actuator configured to move the seat about a first axis of a pivot at a command angle;
• at least one sensor positioned to detect movement of the vehicle;
• and
• a controller configured to:
• receive an input from the at least one sensor,
• determine a vehicle roll angle based at least in part on the input,
• generate a variable gain based at least in part on a vehicle roll acceleration determined from the input, wherein the variable gain modulates a gain of a band-pass filter having a fixed bandwidth,
• generate a command signal based at least in part on the vehicle roll angle, the controller being configured to adjust a magnitude of the command signal relative to an amplitude of the input and apply the band-pass filter, and
• provide a force command to the actuator to move the seat at a desired command angle based on the command signal.

A vehicle seat, comprising:

• a seat configured to move at a command angle about a first axis of a pivot relative to a substantially horizontal orientation;
• and
• a controller configured to:
• receive an input of detected movement of the vehicle,
• determine a vehicle roll angle based at least in part on the input,
• generate a variable gain based at least in part on a vehicle roll acceleration determined from the input, wherein the variable gain modulates a gain of a band-pass filter having a fixed bandwidth,
• generate a command signal based at least in part on the vehicle roll angle, the controller being configured to adjust a magnitude of the command signal relative to an amplitude of the input and apply the band-pass filter, and
• provide a force command to the actuator to move the seat at a desired command angle based on at least the command signal.