Date of Award

Fall 1989

Document Type

Thesis - Restricted

Degree Name

Master of Science (MS)

Department

Electrical Engineering

First Advisor

Brown, Ronald H.

Second Advisor

Schneider, Susan C.

Abstract

The use of step motors for precise motion control applications are restricted by the step motor's open loop step response. It is observed that a significant amount of the total time is consumed by the step motor oscillating about the final point. While a lot of work has been done on minimizing these oscillations, not enough has been done on explaining the theory behind the causes for these oscillations. With a better understanding of the phenomena of oscillations in the step motor, it is easier to design a circuit to minimize the oscillations of the step motor at the end of the move. In this thesis, a phase-lead compensation circuit that significantly minimizes oscillations for the bifilar hybrid step motor driven open-loop is developed arid implemented. For applications that require precise point to point moves the step motor needs to be driven closed loop. A study of different closed loop strategies is conducted and an efficient control scheme that could be used for practical implementation is presented.

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