Stability Criteria for A Velocity Servo System whose D. C. Tachometer Generator shows Rippled Output

DOI

Bibliographic Information

Other Title
  • 直流速度発電機の発生電圧に脈動がある場合の速度制御系の安定度について

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Description

A velocity servo system using D. C. tachometer generator as a velocity sensing device is analyzed, with respect to the most simple case whose differential equation for the system is of second order. Ripples involved in the output voltage of the generator is taken into consideration, whose frequencies are directly proportional to the angular velocity of the system concerned. The stability criteria are studied with respect to parametric oscillations caused by the ripple voltage.<BR>Equation for perturbed variable is derived as to the angular velocity, neglecting periodic components of angular velocity of stationary state. The equation is transformed to the Mathieu equation, and the stability regions are expressed as functions of the system constants and ripple coefficient.<BR>It is concluded that the instability of this sort is not likely to occur in practical cases, as far as the system concerned is approximated by the second order differential equation. It is due to the stability criteria that the system, for example, is always kept in stable state, whose relative damping coefficients greater than 0.03, if the ripple coefficent is of the order ten percent.

Journal

  • Automatic Control

    Automatic Control 3 (1), 21-23, 1956

    THE SOCIETY OF INSTRUMENT AND CONTROL ENGINEERS

Details 詳細情報について

  • CRID
    1390282680335342464
  • NII Article ID
    130003935706
  • DOI
    10.11499/sicejl1954.3.21
  • ISSN
    18838162
    04477235
  • Text Lang
    ja
  • Data Source
    • JaLC
    • CiNii Articles
  • Abstract License Flag
    Disallowed

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