DocumentCode :
574521
Title :
A dual method for determining the performance limits of a semiactively constrained control system
Author :
Harvey, Philip S. ; Scruggs, J.T. ; Gavin, H.P.
Author_Institution :
Dept. of Civil & Environ. Eng., Duke Univ., Durham, NC, USA
fYear :
2012
fDate :
27-29 June 2012
Firstpage :
1549
Lastpage :
1554
Abstract :
This paper presents an iterative method for determining control trajectories for systems subject to state and control constraints. By maximizing in the Lagrange multiplier, or dual variable, as opposed to minimizing in the control, or primal variable, consistent updating sets are determined to converge upon the optimal solution. The method is applied to the control of damping forces in an equipment isolation system subjected to constraints imposed by the physical implementation of a particular controllable damper. Control trajectories are designed to minimize peak total response accelerations when the system is excited by a pulse-like acceleration at the base. Potential parameterized feedback control laws are deduced from optimal control trajectories for different excitation frequencies. Performance metrics are compared between the proposed method and a passively damped system for a single-degree-of-freedom isolation system.
Keywords :
acceleration control; feedback; force control; iterative methods; optimal control; shock absorbers; trajectory control; vibration control; Lagrange multiplier; control trajectories; controllable damper; damping forces control; equipment isolation system; excitation frequencies; iterative method; optimal control trajectories; passively damped system; peak total response accelerations; performance limits; physical implementation; potential parameterized feedback control laws; primal variable; pulse-like acceleration; semiactive constrained control system; single-degree-of-freedom isolation system; systems control trajectories; Acceleration; Actuators; Damping; Force; Optimal control; Trajectory;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
American Control Conference (ACC), 2012
Conference_Location :
Montreal, QC
ISSN :
0743-1619
Print_ISBN :
978-1-4577-1095-7
Electronic_ISBN :
0743-1619
Type :
conf
DOI :
10.1109/ACC.2012.6315106
Filename :
6315106
Link To Document :
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