Abstract
This paper describes a new closed-loop control concept that captures the inherent ability of a stepping motor to function as a mechanical memory. A type of single-phase operation produces the desired memory effect, as well as improving the response time of the two-phase motor. Step-to-step time-optimal control is implemented as a basic minor-loop operation generating a new set of closed-loop control inputs. This new type of closed-loop stepping motor forms the key element of a purely digital servomechanism which features a number of interesting operating modes. The paper outlines the instrumentation of this device in some detail and presents actual performance data.
Published Version
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