A Dual-Mode Damper-Stabilized Servo

The highly oscillatory response of an inertia-damper stabilized servo to large step inputs can be improved greatly by changing, for large error, the coupling torque between the damper and the drive motor. This paper presents the results obtained from an experimental model and an analog computer study of the dual-mode damper-stabilized servo. For large step inputs, this dual-mode method of operation resulted in a reduction of settling time by a factor of 5.8 and reduction of peak overshoot by a factor of 200 as compared with single-mode operation.