VARIABLE BANDWIDTH ACTUATOR CONTROLLER
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United States of America Patent
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Issued Date -
Mar 11, 2021
app pub date -
Sep 10, 2019
filing date -
Sep 10, 2019
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Abstract
A method is provided for controlling an actuator for moving a load. The method includes receiving a selected bandwidth, wherein bandwidth is defined as the frequency at which the gain of the closed loop input-output response is relative to the steady state value and is related to the reciprocal of response time, receiving a command to move the load to a selected position, receiving a feedback of measured motor position, estimating reaction torque or force associated with moving the load in real time, and estimating rotational motor speed and motor position. The method further includes calculating gain for controlling position of the load as a function of the selected bandwidth, wherein in the gain represents an adjustment of at least one of the estimated motor position, motor rotational speed, and reaction torque. The method further includes determining a drive signal to apply to the actuator motor as a function of the estimated reaction torque, the estimated rotational motor speed, the estimated motor position, the gain and the selected position and transmitting the drive signal to the actuator motor to move the load.
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