عنوان مقاله [English]
نویسندگان [English]چکیده [English]
Vibration control of clustered launch vehicles has been significantly encountered with many challenges as a result of multi degree of freedom. The control system must cover all degrees of freedom to approach desired performances. In this regards, frequency response methods play an important role in vibration control of multi body dynamic systems. In this view, vibration control is implemented via dominant frequency estimation and filtering. In several activities used full band adaptive filters, the filtering system cannot apply to complicated vehicles. Powerful properties of signal processing toolboxes lead to design practical and useful vibration control systems. In this paper, vibration reduction is implemented in subband frequency and this is one the main contributions of this study. In this way, high delay made from the subband filtering may lead to degradation of the control system. In this paper, a method is presented for reducing the delay based on the Smith predictor and model reference adaptive approaches. The results of numerical simulation show the proposed approach can satisfactory compensate the problem of delay in the online sub-band filtering. This performance is carried out for a clustered launch vehicle with convenient responses
 Zarafshan, P., S.S.A. Moosavian,. 2013. "Adaptive Hybrid Suppression Control of a Wheeled Mobile Robot with Flexible Solar Panels." Modares Mechanical Engineering 13. 5: pp. 197-202, (In Persian).
 Khoshnood, A. M., H. Moradi. 2014. "Dynamics modeling and active vibration control of a satellite with flexible solar panels." Modares Mechanical Engineering 14. 1: pp. 197-202. (In Persian).
 Simpson R.J.S., R. Palacios R., H. Hesse, P. Goulart. 2014. "Predictive control for alleviation of gust loads on very flexible aircraft." 55th AIAA/ASMe/ASCE/AHS/SC Structures, Structural Dynamics, and Materials Conference. National Harbor, MD; United States; Code 102899.
 Khoshnood, A. M. 2014. "Vibration Control of a Flexible Structure by Reconstruction of Control Input Based on Estimation of Undesired Vibration Frequencies." Modares Mechanical Engineering. 14, 1: pp. 197-202. (In Persian).
 Khoshnood, A. M., J. Roshanian, A. Khaki-sedigh. 2008. "Model Reference Adaptive Control for a Flexible Launch Vehicle." IMechE J. systems and control engineering., 222 1: pp. 49–55.
 Micheau, P., P. Coirault. 2000. "Adaptive controller using filter banks to reject multi-sinusoidal disturbance." Automatica, 36: pp. 1659-1664.
 Malvar, H. S. 1990. "Modified QMF filter banks with perfect reconstruction." Electronic Letters, 26: pp. 906-907.
 Chaplais, F. C., P. Tsiotras, D. Jung. 2004. "On-Line Wavelet Denoising with Application to the Control of a Reaction Wheel System." AIAA Guidance, Navigation, and Control Conference, AIAA Paper 04-5345, Providence.
 Koilpillai, R. D., P.P. Vaidyanathan. 1991. "New results on cosine-modulated FIR filter banks satisfying perfect reconstruction." Proceeding of IEEE international Conference on Acoustic Speech and Signal processing.p.p. 1793-1796, Toronto, Canada.
 Nussbaumer, H. J. Pseudo. 1981. "QMF filter bank, IBM Tech., disclosure Bulletin. 24. 6: pp. 3081-3087.
 Smith, O. J. M., A. 1959. "controller to overcome dead time." ISA Journal of Instrument Society of America. 6: pp. 28–33.
 Panda, R. C., S. B. Hung, C. C. Yu. 2006. "An Integrated Modified Smith Predictor with PID Controller for Integrator plus Dead time." Processing of Industrial Engineering Chem. Res. 45: pp. 1397-1407.
 Zheng, D., J. Fang, Z. Ren. 2010. "Modified Smith predictor for frequency identification and disturbance rejection of single sinusoidal signal." ISA Transactions 49: 95-105.
 Jafari, A. A., A. M. Khoshnood. 2011. "Investigation on the Active Control of Multi Vibration Subsystems via Subband Adaptive Filtering", 2nd International Conference on Electrical and Control Engineering, ICECE, China.
 Khoshnood, A. M. 2011. "Active vibration control of a flexible clustered launch vehicle", Ph.D. Thesis, K. N. Toosi university of Technology.