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TECHNICAL PAPERS

Estimation of Optimal Blank Holder Force Trajectories in Segmented Binders Using an ARMA Model

[+] Author and Article Information
Neil Krishnan, Jian Cao

Department of Mechanical Engineering, Northwestern University, Evanston, IL 60208

J. Manuf. Sci. Eng 125(4), 763-770 (Nov 11, 2003) (8 pages) doi:10.1115/1.1616948 History: Received August 01, 2002; Revised March 01, 2003; Online November 11, 2003
Copyright © 2003 by ASME
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References

Figures

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Variable blank holder force profiles for Binders 1, 2 and 3
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Schematic of one half of the blank used in tailor welded blank forming (Case 3)
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Schematic of one half of the tooling used in case 3
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Binder displacements for Binder 1 and Binder 2 in case 3
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Binder force profiles for Binder 1 and Binder 2 in case 3
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Binder displacements using ARMA model, tuned PI control and untuned PI control
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Calculated binder force profiles using ARMA, tuned PI control and untuned PI control
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(a) Schematic of one quarter of the tooling; (b) Schematic of one quarter of the blank
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Binder Displacements for constant binder forces and variable binder force applied on Binder 1 and the corresponding variable binder force profile. Forces on Binder 2 and Binder 3 are kept constant at 10 kN and 5 kN, respectively.
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Binder displacements for binders 1, 2 and 3 subjected to a variable binder force obtained using an ARMA model
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Binder displacement data used to determine model order and delay
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Binder force data used to determine model order and delay
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Estimation error of validation data for optimal and sub-optimal model structures
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Estimation error of validation data for a sub-optimal model structure

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