Automatic Mode Switching of P/PI Speed Control for Industry Servo Drives Using Online Spectrum Analysis of Torque Command

Conventional proportional/proportional-integral (P/PI) speed controller for today's servo drives has to be manually tuned at the controller switching set point by trial and error, which may translate into drive system downtime and a subsequent loss of productivity. The adjustable drive performa...

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Bibliographic Details
Published inIEEE transactions on industrial electronics (1982) Vol. 54; no. 5; pp. 2642 - 2647
Main Authors Seok, Jul-Ki, Kim, Kyung-Tae, Lee, Dong-Choon
Format Journal Article
LanguageEnglish
Published New York IEEE 01.10.2007
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Automatic control
Commands
Control equipment
Control systems
Dynamics
Electrical equipment industry
Error correction
Frequency content of motor torque
Industrial control
industry servo drive
Motors
Pi control
Polyimide resins
Productivity
Proportional control
proportional/proportional-integral (P/PI) speed controller
Servomechanisms
simple controls/setups
Speed control
Switching
Tracking
Velocity control
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Summary:Conventional proportional/proportional-integral (P/PI) speed controller for today's servo drives has to be manually tuned at the controller switching set point by trial and error, which may translate into drive system downtime and a subsequent loss of productivity. The adjustable drive performance is heavily dependent on the quality of expert knowledge. The performance becomes inadequate in applications where the operating conditions change in a wide range, i.e., tracking command, acceleration/deceleration time, and load disturbances. In this paper, we discuss the demands on simple controls/setups for industry servo drives. Analyzing the frequency content of the motor torque command, P/PI speed control mode switching is automatically performed with only a prior knowledge of the mechanical time constant. The dynamic performance of the proposed scheme assures a desired tracking response curve with minimal oscillation and settling time over the entire set of operating conditions. For a comprehensive comparison of conventional P/PI control scheme, we carried out extensive tests on an actual servo system.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0278-0046
1557-9948
DOI:10.1109/TIE.2007.899824