| 摘要 |
PURPOSE:To reduce an insensitive range due to friction by making the controlling force of an actuator actuating a moving mass to be a sum of a controlling force proportionate to the vibratory speed of a vibratory body and a controlling force equivalent to the frictional force of a movable mass. CONSTITUTION:When a vibratory body 1 is excited by an external force, the vibratory speed of the vibratory body 1 as sensed by an accelerometer 7 is sent to an actuator 3 through an integrator 8a, a totalizer 8d and a power amplifier 8e. The relative speed between the vibratory body 1 and a movable mass 4 is detected by a relative speedometer 9 and is added to the vibratory speed of the vibratory body 1 by the totalizer 8d after going through a polarimeter 8b and a vibration generator 8c. Since the output by the voltage generator 8c causes the actuator 3 to generate a force negating the frictional force, an insensitive range due to the frictional force is solved. |
