Title:
LOAD INERTIA MEASURING DEVICE
Document Type and Number:
Japanese Patent JPH05346359
Kind Code:
A
Abstract:
PURPOSE:To obtain a load inertial measuring device for accurately measuring a load inertial which is connected to the shaft of a servo electric motor in a machine system with the servo electric motor as a drive source. CONSTITUTION:The title device is provided with a servo electric motor 1, sensors 4 and 2 for measuring the rotary position and rotary speed of the servo electric motor, a position comparator 5 for detecting passage of a second rotary position, an acceleration data selection means 6, an acceleration sign inversion means 8, an acceleration integrator 10, a speed difference operator 14, a speed amplifier 15, and a current control amplifier 16 for controlling current command so that the rotary acceleration is equal to a positive or a negative constant value, and a zero speed detection means 13 for detecting the time when the rotary speed reaches 0. Further, it is provided with an electric motor current detection means 3 and an amplifier 12 for calculating the electric motor output torque by observing the current of the servo electric motor, a torque data selection means 7, a torque sign inversion means 9, a torque integrator 11 for measuring the result which is obtained by subtracting the electric motor output torque during rotation with a negative first acceleration from the integration value of the electric motor output torque during rotation with a positive first acceleration.
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Inventors:
TAKADA KAZUYUKI
Application Number:
JP15639392A
Publication Date:
December 27, 1993
Filing Date:
June 16, 1992
Export Citation:
Assignee:
MATSUSHITA ELECTRIC IND CO LTD
International Classes:
G01L3/00; G01M1/10; G01R11/00; H02P5/00; H02P29/00; (IPC1-7): G01L3/00; G01M1/10; G01R11/00; H02P5/00
Attorney, Agent or Firm:
Akira Kobiji (2 outside)