Control of a Civil Structure Using an Electric Machine with Semiactive Capability
Publication: Journal of Structural Engineering
Volume 129, Issue 7
Abstract
This paper concerns the implementation of a brushless DC machine as a force actuator, for use in suppressing vibrations in civil structures. The machine has the dual capability of operation as an active as well as semiactive device. It operates semiactively by using the machine as a generator to convert mechanical energy to electrical energy which is then dissipated. The electrical network uses electronic switching to control the power flow from the machine. With the machine shaft connected to a gear reducer and ballscrew mechanism, the result is a device that resembles a linear damper with a controllable damping coefficient. The only external electrical power required is that which is needed to support the control system intelligence and to control the transistors, enabling the device to be operated on battery power. As an example of an application of such an actuator, simulations are performed in which the semiactive device is used to control a three-story structural model, with acceleration feedback control. The structural control system design approach is the well-established “clipped-optimal” method. Results suggest that this actuator is effective in simultaneously suppressing the interstory drifts and the absolute accelerations of the structure. A comparison is made to a similar configuration using a magnetorheological damper as the semiactive force device.
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References
Dowdell, D. J., and Cherry, S. (1994). “Semi-active friction dampers for seismic response control of structures.” Proc., 5th U.S. National Conf. on Earthquake Engineering, Chicago, Vol. 1, 819–828.
Dyke, S. J., Spencer, Jr., B. F., Sain, M. K., and Carlson, J. D.(1996). “Modeling and control of magnetorheological dampers for seismic response reduction.” Smart Mater. Struct., 5, 565–575.
Feng, Q., Shinozuka, M., and Fujii, X.(1993). “Friction-controllable sliding isolated systems.” J. Eng. Mech., 119(9), 1845–1864.
Gavin, H. P., Hanson, R. D., and Filisko, F. E.(1996). “Electrorheological dampers. I: Analysis and design.” ASME J. Appl. Mech., 63, 669–675.
Hagood, N. W., and von Flotow, A.(1991). “Damping of structure vibrations with piezoelectric materials and passive electrical networks.” J. Sound Vib., 146(2), 243–268.
Housner, G. W., Bergman, L. A., Caughey, T. K., Cassiakos, A. G., Claus, R. O., Masri, S. F., Skelton, R. E., Soong, T. T., Spencer, B. F. J., and Yao, J. T. P.(1997). “Structural control: Past, present and future.” J. Eng. Mech., 123(9), 897–971.
Kannan, S., Uras, H. M., and Aktan, H. M.(1995). “Active control of building seismic response by energy dissipation.” Earthquake Eng. Struct. Dyn., 24(5), 747–759.
Karnopp, D.(1989). “Permanent magnet linear motors used as variable mechanical dampers for vehicle suspensions.” Veh. Syst. Dyn., 18, 187–200.
Kassakian, J. G., Schlecht, M. F., and Verghese, G. C. (1991). Principles of power electronics, Addison-Wesley, Reading, Mass.
Kobori, T., Takahashi, M., Nasu, T., Niwa, N., and Ogasawara, K.(1993). “Seismic response controlled structure with active variable stiffness system.” Earthquake Eng. Struct. Dyn., 22, 925–941.
Krishnan, R. (2001). Electric motor drives: Modeling, analysis, and control, Prentice-Hall, Upper Saddle River, N.J.
Kurata, N., Kobori, T., Takahashi, M., Niwa, N., and Kurino, H. (1994). “Shaking table experiments of active variable damping system.” 1st World Conf. on Structural Control, Los Angeles, TP2, 108–127.
Masri, S. F., Kumar, R., and Ehrgott, R. C.(1995). “Modeling and control of an electrorheological device for structural control applications.” Smart Mater. Struct., 4(Mar.), A121–A131.
Nerves, A. C., and Krishnan, R. (1996). “A strategy for active control of tall civil structures using regenerative electric actuators.” Proc., Engineering Mechanics Conf., Fort Lauderdale, Fla., 503–506.
Nesmir, D., Lin, Y., and Osegueda, R.(1994). “Semiactive motion control using variable stiffness.” J. Struct. Eng., 120(4), 1291–1306.
Patten, W. N., He, Q., Kuo, C. C., Liu, L., and Sack, R. L. (1994). “Sesimic structural control via hydraulic semi-active vibration dampers.” 1st World Conf. on Structural Control, Los Angeles, FA2, 83–89.
Pillay, P., and Krishnan, R.(1989). “Modeling, simulation, and analysis of permanent-magnet motor drives. II: The brushless dc motor drive.” IEEE Trans. Ind. Gen. Appl., 25(2), 274–279.
Soong, T. T. (1990). Active structural control: Theory and practice, Longman Wiley, London.
Spencer, Jr., B. F., Dyke, S. J., Sain, M. K., and Carlson, J. D.(1997). “Phenomenological model of a magnetorheological damper.” J. Eng. Mech., 123(3), 230–238.
Symans, M. D., and Constantinou, M. C.(1997). “Experimental testing and analytical modeling of semiactive fluid dampers for seismic protection.” J. Intell. Mater. Syst. Struct., 8(8), 644–657.
Tseng, H. E., and Hedrick, J. K.(1994). “Semi-active control laws—optimal and sub-optimal.” Veh. Syst. Dyn., 23, 545–69.
Wang, K. W., Lai, J. S., and Yu, W. K.(1996). “An energy-based parametric control approach to structural vibration suppression via semi-active piezoelectric networks.” J. Vibr. Acoust., 118(July), 505–509.
Zhang, Y., and Iwan, W. D.(2001). “Active interaction control of civil structures. Part 1: SDOF systems.” Earthquake Eng. Struct. Dyn., 31, 161–178.
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Copyright © 2003 American Society of Civil Engineers.
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Received: Aug 20, 2001
Accepted: May 20, 2002
Published online: Jun 13, 2003
Published in print: Jul 2003
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