0
Research Papers

Adaptive Control of Pressure Tracking for Polishing Process

[+] Author and Article Information
Liang Liao

Department of Aerospace Engineering, Ryerson University, Toronto, ON, M5B 2K3, Canada

Fengfeng Jeff Xi1

Department of Aerospace Engineering, Ryerson University, Toronto, ON, M5B 2K3, Canadafengxi@ryerson.ca

Kefu Liu

Department of Mechanical Engineering, Lakehead University, Thunder Bay, ON, P7B 5E1, Canada

1

Corresponding author.

J. Manuf. Sci. Eng 132(1), 011015 (Feb 02, 2010) (12 pages) doi:10.1115/1.4000959 History: Received March 29, 2008; Revised December 08, 2009; Published February 02, 2010; Online February 02, 2010

In this paper, an adaptive controller is developed for the pressure tracking of the pressurized toolhead in order to maintain the constant contact stress for the polishing process. This is a new polishing control method, which combines the adaptive control theory and the constant stress theory of the contact model. By using an active pneumatic compliant toolhead, a recursive least-squares estimator is developed to estimate the pneumatic model, and then a minimum-degree pole-placement method is applied to design a self-tuning controller. The simulation and experiment results of the proposed controller are presented and discussed. The main advantage of the constant contact stress control is high figuring accuracy.

Copyright © 2010 by American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Figure 1

Polishing/deburring robotics system

Grahic Jump Location
Figure 2

Toolhead assembly

Grahic Jump Location
Figure 3

Toolhead control system

Grahic Jump Location
Figure 4

Block diagram illustrating the dynamic interaction

Grahic Jump Location
Figure 5

Test part: doorstop

Grahic Jump Location
Figure 6

Screen snapshot of interface for edge probing

Grahic Jump Location
Figure 7

Planned cylinder pressure and Minimum radii of the part

Grahic Jump Location
Figure 8

Block diagram of a self-tuning regulator

Grahic Jump Location
Figure 9

Cylinder pressure response

Grahic Jump Location
Figure 10

Simulink model for the self-tuning regulator

Grahic Jump Location
Figure 11

Output versus reference input

Grahic Jump Location
Figure 12

Estimated parameters

Grahic Jump Location
Figure 13

Pressure tracking test for a sine wave

Grahic Jump Location
Figure 14

Estimated parameters

Grahic Jump Location
Figure 15

Pressure trajectory tracking

Grahic Jump Location
Figure 16

Control signal to the pneumatic valve

Grahic Jump Location
Figure 17

Estimated parameters

Grahic Jump Location
Figure 18

Part profile before and after polishing using adaptive control

Grahic Jump Location
Figure 19

Polished area using adaptive control

Grahic Jump Location
Figure 20

Minimum radii of the part for constant force control

Grahic Jump Location
Figure 21

Planned pressure for constant force control

Grahic Jump Location
Figure 22

Part profile before and after polishing using constant force control

Grahic Jump Location
Figure 23

Polished area of the part using constant force control

Grahic Jump Location
Figure 24

Minimum radii of the part using PID control

Grahic Jump Location
Figure 25

Planned pressure for PID control

Grahic Jump Location
Figure 26

Pressure trajectory tracking using PID control

Grahic Jump Location
Figure 27

Part profile before and after polishing using PID control

Grahic Jump Location
Figure 28

Polished area of the part using PID control

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In