High accuracy motor controller for positioning optical filters in the CLAES SpectrometerThe Etalon Drive Motor (EDM), a precision etalon control system designed for accurate positioning of etalon filters in the IR spectrometer of the Cryogenic Limb Array Etalon Spectrometer (CLAES) experiment is described. The EDM includes a brushless dc torque motor, which has an infinite resolution for setting an etalon filter to any desired angle, a four-filter etalon wheel, and an electromechanical resolver for angle information. An 18-bit control loop provides high accuracy, resolution, and stability. Dynamic computer interaction allows the user to optimize the step response. A block diagram of the motor controller is presented along with a schematic of the digital/analog converter circuit.
Document ID
19900024239
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Thatcher, John B. (Lockheed Research Laboratories Palo Alto, CA, United States)
Date Acquired
August 14, 2013
Publication Date
January 1, 1989
Subject Category
Spacecraft Instrumentation
Meeting Information
Meeting: Cryogenic Optical Systems and Instruments III