[REQUEST] optimal control (article request)

[lizard]

Hi dear members
I would be grateful if anyone could provide me with these papers and reports about optimal control .

1-Optimal Control of Nonlinear Structures
J. N. Yang, F. X. Long, and D. Wong
J. Appl. Mech. -- December 1988 -- Volume 55, Issue 4, 931 (8 pages)

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2-INSTANTANEOUS OPTIMAL CONTROL FOR SEISMIC ANALYSIS OF NON-LINEAR STRUCTURES
K. Huang - *Gradute Studenta; R. Betti† - †Associate Professora; M. M. Ettouney† - ‡Principalb

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3-Instantaneous Optimal Control with Acceleration and Velocity Feedback
J.N.Yang, Z.Li
NCEER-90-0016 | 6/29/1990 | 52 pages |

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4-Optimal Control of Nonlinear Flexible Structures
J.N. Yang, F.X. Long and D. Wong
NCEER-88-0002 | 1/22/1988 | 110 pages

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the first two are very necessary
thanks a lot
regards

[melkat]

1-Optimal Control of Nonlinear Structures
J. N. Yang, F. X. Long, and D. Wong
J. Appl. Mech. -- December 1988 -- Volume 55, Issue 4, 931 (8 pages)

Code:

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[lizard]

can anyone share #4 it is really important for me
here is the link again:
4-Optimal Control of Nonlinear Flexible Structures
J.N. Yang, F.X. Long and D. Wong
NCEER-88-0002 | 1/22/1988 | 110 pages

Code:

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thanks