Compensation technique for force balance devices

Sarma, GR and Chetty, Shyam (1982) Compensation technique for force balance devices. IEEE Transactions on Instrumentation and Measurement, IM-31. pp. 281-283.

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A damping system is analytically defined for use in losed-loop force balance applications. The configuration involves introduction of a secondary coil on the same former as the force coil nominally employed to generate a force opposed and proportional to an applied mechanical input. The additional coil is suspended in the magnetic field of the electrodynamic force generator and generates a voltage with two components. One is caused by the velocity of the coil assembly, with the other due to the current changes in the force coil. A block diagram of the device circuitry is provided. The technique does not enhance the high frequency noise and permits damping adjustments to be made independent of the forward gain loop. A full range of closed loop damping is possible with the addition of the supplementary coil.

Item Type: Article
Additional Information: xA9;1982 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
Uncontrolled Keywords: Electrodynamics; Feedback control; Force distribution; Instrument compensation; Magnetic coils; Magnetic suspension; Damping; Noise reduction; Noise spectra
Subjects: ENGINEERING > Instrumentation and Photography
Depositing User: Ms. Alphones Mary
Date Deposited: 25 Apr 2006
Last Modified: 24 May 2010 04:09

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