Adaptive Control Strategy for Dynamic Substructuring Tests
Publication: Journal of Engineering Mechanics
Volume 133, Issue 8
Abstract
Real-time dynamic substructuring, or hybrid testing, is a technique that enables experimental testing of critical elements of a complete structure. The structure in question is decomposed into at least two parts: the critical element, which is physically tested, and the remainder of the structure, which is modeled numerically. For accurate replication of the system to be emulated, the two parts must interact, via a controller to compensate for the actuator dynamics, in real-time, and with minimal errors at their interfaces. During development, the adaptive minimal controller synthesis (MCS) algorithm controller has previously been implemented for substructuring of a one-degree-of-freedom mass-spring-damper system. The potential advantage that MCS has over a traditional linear controller is its lack of reliance on detailed knowledge of the experimental specimen dynamics. This paper presents the MCSmd control strategy, an improved MCS-based strategy for substructure testing, using a modified demand (md) signal. Experimental and simulation studies of the MCSmd controller applied to a two-degree-of-freedom mass spring damper system are presented along with an analysis of the transient gain behavior.
Get full access to this article
View all available purchase options and get full access to this article.
Acknowledgments
The writers gratefully acknowledge the support of the EPSRC grant “The Development of Multi-Axis Real-Time Substructure Testing” (GR/S03737/01) and the EC Grant: “New fields of research in earthquake engineering experimentation” (HPRI-CT-2001-50023) in carrying out this work.
References
Blakeborough, A., Williams, M. S., Darby, A. P., and Williams, D. M. (2001). “The development of real-time substructure testing.” Philos. Trans. R. Soc. London, Ser. A, 359, 1869–1891.
Darby, A. P., Blakeborough, A., and Williams, M. S. (1999). “Real-time substructure tests using hydraulic actuator.” J. Eng. Mech., 125(10), 1133–1139.
Horiuchi, T., Inoue, M., Konno, T., and Namita, Y. (1999). “Real-time hybrid experimental system with actuator delay compensation and its application to a piping system with energy absorber.” Earthquake Eng. Struct. Dyn., 28, 1121–1141.
Landau, Y. D. (1979). Adaptive control: The model reference approach, Vol. 8, Marcel Dekker, New York.
Lim, C. N., Neild, S. A., Stoten, D. P., Taylor, C. A., and Drury, D. (2004). “Using adaptive control for dynamic substructuring tests.” 13th World Conf. on Earthquake Engineering.
Neild, S. A., Drury, D., Wagg, D. J., Stoten, D. P., and Crewe, A. J. (2002). “Implementing real-time adaptive control methods for substructuring of large structures.” Proc., 3rd Conf. in Structural Control Vol. 2, 811–817.
Neild, S. A., Stoten, D. P., and Drury, D. (2005a). “An improved substructuring control strategy based on the MCS control algorithm.” Proc., Institution of Mechanical Engineers. Part I: J. of Systems and Control Engineers, 219(5), 305–317.
Neild, S. A., Stoten, D. P., Drury, D., and Wagg, D. J. (2005b). “Control issues relating to real-time substructuring using a shaking table.” Earthquake Eng. Struct. Dyn., 34(9), 1171–1192.
Stoten, D. P. (1990). Model reference adaptive control of manipulators, Wiley, New York.
Stoten, D. P. (1993). “An overview of the minimal control synthesis algorithm.” IMechE Conf. on Aerospace Hydraulics and Systems, C474-033.
Stoten, D. P., and Benchoubane, H. (1990). “Robustness of a minimal controller synthesis algorithm.” Int. J. Control, 51, 851–861.
Stoten, D. P., Neild, S. A., Wagg, D. J., and Drury, D. (2002). “Dynamics and substructuring via the adaptive MCS algorithm.” Third World Conf. in Structural Control, Vol. 2, 819–825.
Wagg, D. J., and Stoten, D. P. (2001). “Substructuring of dynamic systems via the adaptive minimal control synthesis algorithm.” Earthquake Eng. Struct. Dyn., 30, 865–877.
Wallace, M. I., Wagg, D. J., and Neild, S. A. (2005). “An adaptive polynomial based forward prediction algorithm for multiactuator real-time dynamic substructuring.” Proc., Royal Society, Part A, Vol. 461(2064), 3807–3826.
Information & Authors
Information
Published In
Journal of Engineering Mechanics
Volume 133 • Issue 8 • August 2007
Pages: 864 - 873
Copyright
© 2007 ASCE.
History
Received: Apr 21, 2005
Accepted: Dec 28, 2006
Published online: Aug 1, 2007
Published in print: Aug 2007
Notes
Note. Associate Editor: Henri P. Gavin
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.