A new control principle to increase the bandwidth of feed drives with large inertia ratio
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This paper presents a new control principle to improve the bandwidth of feed drives without any additional sensor or actuator. The speed difference between the motor and the table is regarded as the mechanical vibration and fed back to the controller. The presented principle is feasible for feed drives with large inertia ratio, which can be achieved by utilizing a ball screw with high pitch and a high dynamic motor with small inertia. The stability condition is found through the Lyapunov criteria. The experimental results verify its effectiveness and robustness.
KeywordsControl Feed drives Dynamics
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