An attitude control system comprising a controller and a noise screen
device coupled to the controller. The controller is adapted to control an
attitude of a vehicle carrying an actuator system that is adapted to pulse
in metered bursts in order to generate a control torque to control the
attitude of the vehicle in response to a control pulse. The noise screen
device is adapted to generate a noise screen signal in response to the
control pulse that is generated when an input attitude error signal
exceeds a predetermined deadband attitude level. The noise screen signal
comprises a decaying offset signal that when combined with the attitude
error input signal results in a net attitude error input signal away from
the predetermined deadband level to reduce further control pulse
generation.