Design and Analysis of Precision Active Disturbance Rejection Control for Noncircular Turning Process

In this paper, a new fast tool servocontrol method for noncircular turning process (NCTP) is presented. Based on the tracking and disturbance rejection requirements for NCTP, the controller is designed through a combined active disturbance rejection control and feedforward arrangement by exploiting...

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Bibliographic Details
Published inIEEE transactions on industrial electronics (1982) Vol. 56; no. 7; pp. 2746 - 2753
Main Authors Dan Wu, Dan Wu, Ken Chen, Ken Chen
Format Journal Article
LanguageEnglish
Published New York IEEE 01.07.2009
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Acceleration
Acceleration feedforward
Active control
active disturbance rejection control (ADRC)
Design engineering
Disturbances
Dynamical systems
fast tool servo (FTS)
Feedforward
Mathematical models
noncircular turning
Nonlinear dynamical systems
Nonlinear dynamics
Observers
Pi control
Proportional control
Rejection
Signal design
State estimation
Studies
Transfer functions
Turning
Uncertainty
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ISSN0278-0046
1557-9948
DOI10.1109/TIE.2009.2019774

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Summary:In this paper, a new fast tool servocontrol method for noncircular turning process (NCTP) is presented. Based on the tracking and disturbance rejection requirements for NCTP, the controller is designed through a combined active disturbance rejection control and feedforward arrangement by exploiting the unique disturbance estimation and compensation concept and the known reference acceleration signals. In such a design framework, an extended state observer is applied to estimate and compensate for the variant dynamics of the system, nonlinearly variable cutting load, and other uncertainties. Then, a simple proportional integral controller and the acceleration feedforward design produce the control law. To quantify the controller performances, the transfer function description of the controller is derived, and the dynamic stiffness and tracking have been analyzed. By defining the vector margin variation rate, the effects of the plant parameter variations on closed-loop stability are also addressed. Experimental results of machining the first- and second-order oval profiles demonstrate that the tracking error is less than 3 mum for different cutting parameters.
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ISSN:0278-0046
1557-9948
DOI:10.1109/TIE.2009.2019774