Method and system for estimating inertia of 2-mass system during speed control
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United States of America Patent
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-
Dec 19, 1995
Grant Date -
N/A
app pub date -
Nov 30, 1993
filing date -
Nov 30, 1992
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method and system for estimating an inertia of 2-mass system constituted by a motor and a load connected through a torsionable shaft during operation. The estimating method is implemented as follows: (a) obtaining a deviation between a motor speed preset value and a motor speed in a deviation section; (b) inputting the deviation from the deviation section into an adding section through a speed control amplifier; (c) obtaining a motor generating torque by inputting the output from the speed control amplifier and the load torque estimate into an adding section; (e) inputting the motor generating torque into a model of the 2-mass system; and (f) obtaining an inertia error by inputting the load torque estimate into the inertia error estimating section. With this method, it becomes possible to estimate the inertia of the 2-mass system even if the load inertia is varied during operation.
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