Abstract
Integrated optimum design of structures and control systems is studied by using H 2 and \( H_{\infty }\) robust control formulations. It is derived that conventional simultaneous optimization approach by using these robust control laws can be approximated by a decoupled optimization approach in which the structures are optimized by shaping the structural singular values and then the controllers can be designed, namely, decoupled, sequential or successive design approach. It is shown that the proposed decoupled optimization approach can be used to design optimum robust structures and has certain advantages over the conventional simultaneous optimization procedures such as it avoids the drawbacks of pure robust control laws and faster, especially if the number of degrees of freedom (DOF) of the associated structure is large. The bounds for achievable robustness measures are also obtained. Following, simultaneous and decoupled optimization approaches are applied to active control of two structures. The optimization results are presented, and it is concluded that the proposed decoupled optimization approach yields the achieved global minimum much faster than the simultaneous optimization approach.
Similar content being viewed by others
References
Amerongen J (2003) Mechatronic design. Mechatronics 13:1045–1066
Ando H, Sakai T, Obinata G (2005) Integrated design of structural shape and controller for a high-speed positioning actuator by using a genetic algorithm. Proc. Eighth IASTED International Conference on Intelligent Systems and Control. Cambridge MA, USA, 114–119
Boresi AP, Sidebottom OM, Seely FB, Smith JO (1978) Advanced mechanics of materials. Wiley, New York
Bodden DS, Junkins JL (1985) Eigenvalue optimization algorithms for structure/controller design iterations. J Guid Control Dyn 8:697–706
Bozca M (2005) Integrated optimum design of structures and controllers. Ph.D. dissertation submitted to Istanbul Technical University, Istanbul, Turkey
Bozca M, Mugan A (2004) Concurrent optimization of controlled structures for robustness. Proc. Fifth International Carpathian Control Conference. Zakopane Poland, 35–44
Brussel H, Sas P, Nemeth I, Fonseca P, Braembusche P (2001) Towards a mechatronic compiler. IEEE/ASME Trans Mechatron 6:90–105
Butler SL, Dhingra AK (2003) Integrated structure and control design of actively controlled structures using substructure decomposition. Eng Optim 35:325–340
Camino JF, De Oliveira MC, Skelton RE (2003) Convexifying linear matrix inequality methods for integrating structure and control design. J Struct Eng 129:978–988
Chen C-Y, Cheng C-C (2004) Integrated structure and controller design of machine tools. Proc. IEEE Conference on Robotics, Automation and Mechatronics. Singapore, 869–874
Cunedioglu Y, Mugan A, Akcay H (2006) Frequency domain analysis of model order reduction techniques. Finite Elem Anal Des 42:367–403
Ersoy H, Mugan A (2002) Design sensitivity analysis of structures based upon the singular value decomposition. Comput Methods Appl Mech Eng 191:3459–3476
Freudenberg J, Looze DP (1988) Frequency domain properties of scalar and multivariable feedback systems. Springer, Berlin
Friedland B (1996) Advanced control system design. Prentice-Hall, New Jersey
Fu K, Mills, JK (2002) Theoretical evaluation of the integrated structure and control design approach by optimization theory. Proc. ASME Design Engineering Technical Conference. Montreal Que. Canada, 773–778
Fu K, Mills JK (2005) A convex approach solving simultaneous mechanical structure and control system design problems with multiple closed-loop performance specifications. J Dyn Syst Meas Control 127:57–68
Fu K, Sun D, Mills, JK (2002) Simultaneous mechanical structure and control system design: optimization and convex approaches. Proc. IEEE International Symposium on Intelligent Control. Vancouver, Canada, 746–751
Gilbert MG, Schmidt DK (1991) Integrated structure/control law design by multilevel optimization. J Guid Control Dyn 14:1001–1007
Golub GH, Loan CFV (1983) Matrix computations. Johns Hopkins University Press, Baltimore
Gu JM, Ma ZD, Hulbert GM (2000) A new load-dependent Ritz vector method for structural dynamics analyses: quasi-static Ritz Vectors. Finite Elem Anal Des 36:261–278
Gu JM, Ma ZD, Hulbert GM (2001) Quasi-static data recovery for dynamic analyses of structural systems. Finite Elem Anal Des 37:825–841
Haftka RT (1990) Integrated structure-control optimization of space structures. Proc. AIAA Dynamics Specialist Conference, Long Beach California, 1–9
Haftka RT (1992) Elements of structural optimization. Kluwer, London
Haftka RT, Watson LT (2005) Multidisciplinary design optimization with quasiseparable subsystems. Optim Eng 6:9–20
Haug EJ, Choi KK, Komkov V (1986) Design sensitivity analysis of structural system. Academic, London
Hiramoto K, Grigoriadis K (2005) Integrated design of structural and control systems with a homotopy like iterative method. Proc. American Control Conference. Portland OR, USA, 2510–2515
Horn RA, Johnson CR (1995) Topics in matrix analysis. Cambridge University Press, Cambridge
Hughes TJR (1987) The finite element method. Prentice Hall, New Jersey
Kajiwara I, Tsujioka K, Nagamatsu A (1994) Approach for simultaneous optimization of a structure and control system. AIAA J 32:866–873
Khot NS (1995) Optimum structural design and robust active control using singular value constraints. Comput Mech 16:208–215
Khot NS, Öz H (1997) Structural-control optimization with H 2 and H ∞ norm Bounds. Optim Control Appl Methods 18:297–311
Khot NS, Veley DE (1992) Robustness characteristic of optimum structural/ control design. J Guid Control Dyn 15:81–87
Kwan YW, Bang HC (2000) The finite element method using Matlab. CRC Press, Singapore
Limebeer DJN, Anderson BDO, Hendel B (1994) A nash game approach to mixed \({{H_2 } \mathord{\left/ {\vphantom {{H_2 } {H_\infty }}} \right. \kern-\nulldelimiterspace} {H_\infty }}\) control. IEEE Trans Automat Control 39:69–82
Lu J, Skelton RE (2000) Integrating structure and control design to achieve mixed H2/Hinfinity performance. Int J Control 73:1449–1462
Matlab Manuals (2006) Robust control toolbox for use with Matlab. Mathworks.
Mayzus A, Grigoriadis K (1998) Robust integrated structural and control design for vector second-order systems via LMIs. Proceedings of Smart Structures and Materials 3323:167–178
Mugan A (2002) Effects of mode localization on input–output directional properties of structure. J Sound Vib 258:45–63
Obinata G, Anderson BDO (2001) Model order reduction for control system design. Springer, Berlin
Ohse N, Yanagisawa T, Morita R (2000) An LMI approach to optimal simultaneous system design of structure and controller under Hinfinity constraint. Proc IEEE Conf Decis Control 5:4588–4593
Onoda J, Haftka RT (1987) Approach to structure/control simultaneous optimization for large flexible spacecraft. AIAA J 25:1133–1138
Ou JS, Kikuchi N (1996) Optimal design of controlled structure. Struct Optim 11:19–28
Padula SL, Sandridge CA, Walsh JL, Haftka RT (1992) Integrated controls—structures optimization of a large space structure. Comput Struct 42:725–732
Schittowski K (1985) NLQPL: A Fortran-subroutine solving constrained nonlinear programming problems. Oper Res 5:485–500
Schutte JF, Haftka RT, Watson LT (2004) Decomposition and two-level optimization of structures with discrete sizing variables. Proc. AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference. Palm Springs CA, USA, 349–353
Shyu WH, Ma ZD, Hulbert GM (1997) A new component mode synthesis method: quasi-static mode compensation. Finite Elem Anal Des 24:271–281
Shyu WH, Gu J, Hulbert GM, Ma ZD (2000) On the use of multiple quasi-static mode compensation sets for component mode synthesis of complex structures. Finite Elem Anal Des 35:119–140
Tsujioka K, Kajiwara I, Nagamatsu A (1996) Integrated optimum design of structure and \(H_{\infty } \) control system. AIAA J 34:159–165
Uyar O (2006) Effects of mode localization and curve veering on input–output directional properties of rotationally periodic structures. M.Sc. thesis submitted to Istanbul Technical University
Verma M, Jonckheere EA (1984) L-compensation with mixed sensitivity as a broadband matching problem. Syst Control Lett 4:125–129
Wu FX, Zhang WJ, Li Q, Ouyang PR (2002) Integrated design and PD control of high-speed closed-loop mechanisms. Trans ASME 124:522–528
Zames G, Francis BA (1983) Feedback, minimax sensitivity, and optimal robustness. IEEE Trans Autom Control AC-28:585–601
Zeiler TA, Gilbert MG (1990) Integrated control/structure optimization by multilevel decomposition. Proc. AIAA/ASME/ASCE/AHS Structures, Structural Dynamics & Materials Conference. Long Beach CA, USA, 247–257
Zhou K, Doyle JC, Glover K (1996) Robust and optimal control. Prentice Hall, New Jersey
Zhu Y, Qiu J, Tani J, Urushiyama Y, Hontani Y (1999) Simultaneous optimization of structure and control for vibration suppression. J Vib Acoust 121:237–243
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Bozca, M., Muğan, A. & Temeltaş, H. Decoupled approach to integrated optimum design of structures and robust control systems. Struct Multidisc Optim 36, 169–191 (2008). https://doi.org/10.1007/s00158-007-0208-1
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s00158-007-0208-1