Mohammadpour Velni, J , and Grigoriadis, K. M., “Delay-dependent H_∞ Filtering for Time-delayed LPV Systems, Systems & Control Letters,. Vol. 57, No. 4, pp. 290– 299, 2008. [Full Text- PDF]

Zhang, F., Grigoriadis, K. M., Franchek, M., Makki, I. H., “Transient Lean Burn Air-Fuel Ratio Linear Parameter-Varying Control Using Input Shaping,” International Journal of Modeling, Identification and Control: Special Issue: Advanced Control Systems in Automotive Applications, Vol. 3, No. 1, pp. 74-83, 2008.

Han, L., Song, G., Li, H., and Grigoriadis, K.M. ” H_∞ Robust Control Design of Active Structural Vibration Suppression Using an Active Mass Damper,” Smart Materials and Structures, Vol. 17, pp. 121-134, 2008. [Full Text- PDF]

Franco, J., Franchek, M.A., and Grigoriadis, K.M., “Real-time brake torque estimation for internal combustion engines”, Mechanical Systems and Signal Processing, Vol. 22, No. 2, pp. 338-361, 2008. [Full Text- PDF]

Zhang, F., Grigoriadis, K. M., and Fialho, I.,”Linear Parameter Varying Antiwindup Compensation for Active Microgravity Vibration Isolation,” AIAA Journal of. Guidance, Control and Dynamics, Vol. 30, No. 4, pp. 1062-1067, 2007.

Zhang, F., Grigoriadis, K. M., Franchek, M., and Makki, I., “Parameter varying Lean Burn Air-Fuel Ratio Control for IC Engines, ASME Journal of Dynamical Systems and Control, Vol. 129, No. 4, pp. 404-414, 2007 [Full Text- PDF]

Mohammadpour Velni, J , and Grigoriadis, K. M., “Less Conservative Results for Delay-dependent H_∞ Filtering for a Class of Time-delayed LPV Systems,” International Journal of Control, Vol. 80. No. 2, pp. 281-291, 2007. [Full Text- PDF]

Tan, K. and Grigoriadis, K. M., “Stabilization and H_∞ Control of Discrete-Time Symmetric Systems, Journal of the Franklin Institute, Vol. 344, pp. 58-73, 2007

Grigoriadis, K. M., “Discussion on Energy-to-Peak Model Reduction for 2-D Discrete Systems in Fornasini-Marchesini Form,” European Journal of Control, Vol. 12, pp. 432-434, 2006 (Invited).

Hiramoto, K., and Grigoriadis, K. M., “Integrated Design of Structural and Control Systems with a Homotopy-like Iterative Method,” International Journal of Control, Vol. 79, No. 9, pp. 1062-1073, 2006. [Full Text- PDF]

Bai, Y., and Grigoriadis, K. M., “H_∞ Collocated Control of Structural Systems: An Analytical Bound Approach,” AIAA Journal of Guidance, Control and Dynamics, Vol. 28, No.5, pp. 850-855, 2005.

Song, Q., and Grigoriadis, K. M., “Linear Parameter varying Control of Delay Systems with Applications to Engine Control,” Transactions on Systems, Vol. 5, No. 3, pp. 2331-2335, 2004.

Tan, K., and Grigoriadis, K. M., “H_∞ and L₂ to L_∞ Gain Control of LPV Systems with Parameter Varying Delays,” IEE Proceedings on Control Theory and Applications, Special Issues on LMI Control, Vol. 150, No. 5, pp. 509-518, 2003. [Full Text- PDF]

Abdalla, M., Grigoriadis, K. M., Zimmerman, D. Z., “An Optimal Hybrid Expansion-Reduction Damage Detection Method,” Journal of Vibration and Control, Vol. 9, No. 8, pp. 883-895, 2003.

Tan, K., and Grigoriadis, K. M, “Output-feedback Control of LPV Sampled-data Systems, International Journal of Control, Vol. 75, No. 4, pp. 252 – 264, 2002 [Full Text- PDF]

Sidi-Ali-Cherif, S., and Grigoriadis, K. M., “Efficient Model Reduction of Large Scale Systems Using Modified Krylov-subspace Iterative Methods,” International Journal of Engineering Science, Vol. 41, N. 3-5, pp. 507 – 520, 2002. [Full Text- PDF]

Tan, K., and Grigoriadis, K. M., "Stabilization and H_∞ Control of Symmetric Systems: An Explicit Solution," Systems & Control Letters, Vol. 44, pp. 57-72, 2001. [Full Text- PDF]

Wu, F, and Grigoriadis, K. M., "LPV Systems with Parameter-Varying Time Delays: Analysis and Control," Automatica, Vol. 37, No. 2, pp. 221-229, 2001. [Full Text- PDF]

Abdalla, M. O, Grigoriadis, K. M, and Zimmerman, D. C., "Structural Damage Detection Using Linear Matrix Inequality Methods," Journal of Vibration and Acoustics, Vol. 122, No. 4, pp. 448-455, 2000. [Full Text- PDF]

Tan, K., and Grigoriadis, K. M. "State-Feedback Control of LPV Sampled-Data Systems," Mathematical Problems in Engineering, Vol. 6, pp. 145-170, 2000. [Full Text- PDF]

Shi, G., Skelton, R. E., and Grigoriadis, K. M., "Minimum Output Variance Control for FSN Models," Mathematical Problems in Engineering, Vol. 6, pp. 171-188, 2000.

Wu, F., Grigoriadis, K. M., and Packard, A., "Anti-windup Controller Design Using Linear Parameter-Varying Control Methods," International Journal of Control, Vol. 73, No. 12, pp. 1104-1114, 2000. [Full Text- PDF]

Sidi-Ali-Cherif, S., Grigoriadis, K. M, and Subramaniam, M, "Model Reduction of Large Space Structures Using Approximate Component Cost Analysis," AIAA Journal of Guidance, Control and Dynamics, Vol. 22, No. 4, pp. 551-558, 1999.

Mayzus, A., and Grigoriadis, K. M., “Performance bounded integrated structural and controller design using linear matrix inequalities,” Shock and Vibration Digest, Vol. 31, no. 3, pp. 51-58, 1999.

Watson, J., and Grigoriadis, K. M., "Optimal Unbiased Filtering via Linear Matrix Inequalities," Systems & Control Letters, Vol. 35, No. 2, pp. 111-118, 1998 [Full Text- PDF]

Abdalla, M. O, Grigoriadis, K. M., and Zimmerman, D.C., "Enhanced Structural Damage Detection Using Alternating Projection Methods," AIAA Journal, Vol. 36, No. 7, pp. 1305-1311, 1998.

Hassioti, S, and Grigoriadis, K. M., "Damage Detection Using Impulse Response," Nonlinear Analysis, Vol. 30, No. 8, pp. 4757-4766, 1997. [Full Text- PDF]

Grigoriadis, K. M., and Watson, J., "Reduced-order H_∞ Filtering ", IEEE Transactions on Aerospace and Electronic Systems, Vol. 33, No. 4, pp. 1326-1338, 1997. [Full Text- PDF]

Grigoriadis, K. M., "L₂ and L₂-L_∞ Model Reduction via Linear Matrix Inequalities", International Journal of Control, Vol. 68, No. 3, pp. 485-498, 1997.

Syrmos, V., Abdallah, C., Dorato, P. and Grigoriadis, K. M., "Static Output Feedback: A Survey," Automatica, Vol. 33, No. 2, pp. 125-137, 1997. [Full Text- PDF]

Grigoriadis, K. M., and Skelton, R. E., "Minimum Energy Covariance Controllers," Automatica, Vol. 33, No. 4, pp. 569-578, 1997. [Full Text- PDF]

Grigoriadis, K. M., and Skelton, R. E., "Low-order Control Design for LMI Problems Using Alternating Projections," Automatica, Vol. 32, No. 8, pp. 117-1125, 1996. [Full Text- PDF]

Grigoriadis, K. M., Zhu, G. and Skelton, R. E., "Optimal Redesign for Linear Systems," ASME Journal of Dynamic, Systems, Measurement and Control, Vol. 118, pp. 598-605, 1996.

Grigoriadis, K. M., and Skelton, R. E., "Alternating Convex Projection Methods for Discrete-Time Covariance Control Design," Journal of Optimization Theory and Applications, Vol. 88, No. 2, pp. 399-432, 1996.

Grigoriadis, K. M., "Optimal H_∞ Model Reduction via Linear Matrix Inequalities," Systems & Control Letters, Vol. 26, pp. 321-333, 1995. [Full Text- PDF]

Frazho, A. E., Grigoriadis, K. M, and Kherat S., "Alternating Projection Methods for Mixed H₂ and H_∞ Nehari Problems," IEEE Transactions on Automatic Control, Vol. 40, No. 12, pp. 2127-2131, 1995.

Zhu, G., Grigoriadis, K. M., and Skelton, R. E., "Covariance Control Design for the Hubble Space Telescope," AIAA Journal of Guidance, Control and Dynamics, Vol. 18, No. 2, pp. 230-236, 1995.

Grigoriadis, K. M., and Skelton, R. E., "Alternating Convex Projection Methods for Covariance Control Design," International Journal of Control, Vol. 60, No. 6, pp. 1083-1106, 1994. [Full Text- PDF]

Grigoriadis, K. M., Frazho, A. E., and Skelton R. E., "Application of Alternating Convex Projection Methods for Computation of Positive Toeplitz Matrices," IEEE Transactions on Signal Processing, Vol. 42, No. 7, pp. 1873-1875, 1994.

Yasuda, S., Skelton, R. E., and Grigoriadis, K. M., "Covariance Controllers: A New Parametrization of All Stabilizing Controllers," Automatica, Vol. 29, No. 3, pp. 785-788, 1993.

Smith, M. J., Grigoriadis, K. M., and Skelton, R. E., "Optimal Mix of Passive and Active Control in Structures," AIAA Journal of Guidance, Control and Dynamics, Vol. 15, No. 4, pp. 912-919, 1992.

Liu, K., Skelton, R. E., and Grigoriadis, K. M., "Optimal Controllers for Finite Wordlength Implementation," IEEE Transactions on Automatic Control, Vol. 37, No. 9, pp. 1294-1304, 1992.

N207, Engineering Building 1,Dept. of Mech. Engineering, University of Houston, Houston, TX 77204-4006

*Dr. Karolos M. Grigoriadis* Professor of Mechanical Engineering Director,Aerospace Engineering Program University of Houston Houston, TX 77204-4792.


Selected Publications (Full text - pdf) Curriculum Vitae (Printable Version - pdf) Aerospace Engineering Graduate Program Engine Control Research Laboratory Dynamic Systems Control Laboratory Dept. of Mech. Engineering N207 Engineering Building 1 University of Houston Houston, TX 77204-4006 Tel : 713-743-4387 Fax: 713-743-4503 Email: karolos@uh.edu	JOURNAL PUBLICATIONS Meisami-Azad, M., Mohammadpour, J. and Grigoriadis, K. M., “Dissipative analysis and control of state-space symmetric systems,” Automatica, Volume 45, No. 6, June pp. 1574-1579, 2009 [Full Text- PDF] Mehendale, C.S., Fialho, I. J., and Grigoriadis, K. M., “A Linear Parameter-varying Framework for Adaptive Active Microgravity Isolation,” Journal of Vibration and Control, Vol: 15, No: 5, pp. 773-800, 2009. [Full Text- PDF] Meisami-Azad, M., Mohammadpour-Velni, J., and Grigoriadis, K. M., “Explicit Solutions for Collocated Structural Control with Guaranteed H2 norm Performance Specifications,” Smart Materials and Structures, Vol. 18, No. 3, pp. 213-222, 2009. [Full Text- PDF] Zhang F, Grigoriadis, K. M, and Fialho I. J., “Linear Parameter-varying Control for Active Vibration Isolation Systems with Stiffness Hysteresis,” Journal of Vibration and Control, Vol. 15, No: 4, pp. 527-547, 2009 [Full Text- PDF] Hiramoto, K., and Grigoriadis, K. M., “Upper Bound Control of Collocated Mechanical Systems,” Structural Control and Health Monitoring, Vol 16, No. 4, pp. 425-440, 2009. [Full Text- PDF] Mohammadpour, J. , Meisami-Azad, M., and Grigoriadis, K. M., “Integrated Damping Parameter and Control Design in Structural Systems for H2 and H8 Specifications,” Structural and Multidisciplinary Optimization, Vol. 38, No: 4 pp. 377-387, 2009. [Full Text- PDF] Demetriou, M. A, and Grigoriadis, K. M., and Sweeney, R., “Collocated Control of a Smart Cantilevered Beam using an Analytical Upper-bound Approach,” Journal of Intelligent Material Systems and Structures, Vol. 20, pp. 865-873, 2009. [Full Text- PDF] Bai, Y., and Grigoriadis, K. M., “Damping Parameter Design Optimization in Structural Systems Using an Explicit H8 Norm Bound,” Journal of Sound and Vibration, Vol. 319, pp. 795–806, 2009. [Full Text- PDF] Nobrega, E., Abdalla, M., and Grigoriadis, K. M., “Robust Fault Estimation in Uncertain Systems Using an LMI-Based Approach,” International Journal of Robust and Nonlinear Control, Vol. 18, pp. 1657-1680, 2008.[Full Text- PDF] Mohammadpour Velni, J , and Grigoriadis, K. M., “Rate-dependent Mixed H2/H8 Filter Design for Parameter Dependent State-delayed LPV Systems, IEEE Transactions on Circuits and Systems,. Vol. 55, No. 7, pp. 2097-2105, 2008. [Full Text- PDF] Mehendale, C; and Grigoriadis, K. M., “A Double Homotopy Method for Decentralised Control Design, International Journal of Control, Vol. 81, No. 10, pp. 1600-1608, 2008 [Full Text- PDF] Mohammadpour Velni, J , and Grigoriadis, K. M., “Delay-dependent H_∞ Filtering for Time-delayed LPV Systems, Systems & Control Letters,. Vol. 57, No. 4, pp. 290– 299, 2008. [Full Text- PDF] Zhang, F., Grigoriadis, K. M., Franchek, M., Makki, I. H., “Transient Lean Burn Air-Fuel Ratio Linear Parameter-Varying Control Using Input Shaping,” International Journal of Modeling, Identification and Control: Special Issue: Advanced Control Systems in Automotive Applications, Vol. 3, No. 1, pp. 74-83, 2008. Han, L., Song, G., Li, H., and Grigoriadis, K.M. ” H_∞ Robust Control Design of Active Structural Vibration Suppression Using an Active Mass Damper,” Smart Materials and Structures, Vol. 17, pp. 121-134, 2008. [Full Text- PDF] Franco, J., Franchek, M.A., and Grigoriadis, K.M., “Real-time brake torque estimation for internal combustion engines”, Mechanical Systems and Signal Processing, Vol. 22, No. 2, pp. 338-361, 2008. [Full Text- PDF] Zhang, F., Grigoriadis, K. M., and Fialho, I.,”Linear Parameter Varying Antiwindup Compensation for Active Microgravity Vibration Isolation,” AIAA Journal of. Guidance, Control and Dynamics, Vol. 30, No. 4, pp. 1062-1067, 2007. Zhang, F., Grigoriadis, K. M., Franchek, M., and Makki, I., “Parameter varying Lean Burn Air-Fuel Ratio Control for IC Engines, ASME Journal of Dynamical Systems and Control, Vol. 129, No. 4, pp. 404-414, 2007 [Full Text- PDF] Mohammadpour Velni, J , and Grigoriadis, K. M., “Less Conservative Results for Delay-dependent H_∞ Filtering for a Class of Time-delayed LPV Systems,” International Journal of Control, Vol. 80. No. 2, pp. 281-291, 2007. [Full Text- PDF] Tan, K. and Grigoriadis, K. M., “Stabilization and H_∞ Control of Discrete-Time Symmetric Systems, Journal of the Franklin Institute, Vol. 344, pp. 58-73, 2007 Grigoriadis, K. M., “Discussion on Energy-to-Peak Model Reduction for 2-D Discrete Systems in Fornasini-Marchesini Form,” European Journal of Control, Vol. 12, pp. 432-434, 2006 (Invited). Hiramoto, K., and Grigoriadis, K. M., “Integrated Design of Structural and Control Systems with a Homotopy-like Iterative Method,” International Journal of Control, Vol. 79, No. 9, pp. 1062-1073, 2006. [Full Text- PDF] Bai, Y., and Grigoriadis, K. M., “H_∞ Collocated Control of Structural Systems: An Analytical Bound Approach,” AIAA Journal of Guidance, Control and Dynamics, Vol. 28, No.5, pp. 850-855, 2005. Song, Q., and Grigoriadis, K. M., “Linear Parameter varying Control of Delay Systems with Applications to Engine Control,” Transactions on Systems, Vol. 5, No. 3, pp. 2331-2335, 2004. Tan, K., and Grigoriadis, K. M., “H_∞ and L₂ to L_∞ Gain Control of LPV Systems with Parameter Varying Delays,” IEE Proceedings on Control Theory and Applications, Special Issues on LMI Control, Vol. 150, No. 5, pp. 509-518, 2003. [Full Text- PDF] Abdalla, M., Grigoriadis, K. M., Zimmerman, D. Z., “An Optimal Hybrid Expansion-Reduction Damage Detection Method,” Journal of Vibration and Control, Vol. 9, No. 8, pp. 883-895, 2003. Tan, K., and Grigoriadis, K. M, “Output-feedback Control of LPV Sampled-data Systems, International Journal of Control, Vol. 75, No. 4, pp. 252 – 264, 2002 [Full Text- PDF] Sidi-Ali-Cherif, S., and Grigoriadis, K. M., “Efficient Model Reduction of Large Scale Systems Using Modified Krylov-subspace Iterative Methods,” International Journal of Engineering Science, Vol. 41, N. 3-5, pp. 507 – 520, 2002. [Full Text- PDF] Tan, K., and Grigoriadis, K. M., "Stabilization and H_∞ Control of Symmetric Systems: An Explicit Solution," Systems & Control Letters, Vol. 44, pp. 57-72, 2001. [Full Text- PDF] Wu, F, and Grigoriadis, K. M., "LPV Systems with Parameter-Varying Time Delays: Analysis and Control," Automatica, Vol. 37, No. 2, pp. 221-229, 2001. [Full Text- PDF] Abdalla, M. O, Grigoriadis, K. M, and Zimmerman, D. C., "Structural Damage Detection Using Linear Matrix Inequality Methods," Journal of Vibration and Acoustics, Vol. 122, No. 4, pp. 448-455, 2000. [Full Text- PDF] Tan, K., and Grigoriadis, K. M. "State-Feedback Control of LPV Sampled-Data Systems," Mathematical Problems in Engineering, Vol. 6, pp. 145-170, 2000. [Full Text- PDF] Shi, G., Skelton, R. E., and Grigoriadis, K. M., "Minimum Output Variance Control for FSN Models," Mathematical Problems in Engineering, Vol. 6, pp. 171-188, 2000. Wu, F., Grigoriadis, K. M., and Packard, A., "Anti-windup Controller Design Using Linear Parameter-Varying Control Methods," International Journal of Control, Vol. 73, No. 12, pp. 1104-1114, 2000. [Full Text- PDF] Sidi-Ali-Cherif, S., Grigoriadis, K. M, and Subramaniam, M, "Model Reduction of Large Space Structures Using Approximate Component Cost Analysis," AIAA Journal of Guidance, Control and Dynamics, Vol. 22, No. 4, pp. 551-558, 1999. Mayzus, A., and Grigoriadis, K. M., “Performance bounded integrated structural and controller design using linear matrix inequalities,” Shock and Vibration Digest, Vol. 31, no. 3, pp. 51-58, 1999. Watson, J., and Grigoriadis, K. M., "Optimal Unbiased Filtering via Linear Matrix Inequalities," Systems & Control Letters, Vol. 35, No. 2, pp. 111-118, 1998 [Full Text- PDF] Abdalla, M. O, Grigoriadis, K. M., and Zimmerman, D.C., "Enhanced Structural Damage Detection Using Alternating Projection Methods," AIAA Journal, Vol. 36, No. 7, pp. 1305-1311, 1998. Hassioti, S, and Grigoriadis, K. M., "Damage Detection Using Impulse Response," Nonlinear Analysis, Vol. 30, No. 8, pp. 4757-4766, 1997. [Full Text- PDF] Grigoriadis, K. M., and Watson, J., "Reduced-order H_∞ Filtering ", IEEE Transactions on Aerospace and Electronic Systems, Vol. 33, No. 4, pp. 1326-1338, 1997. [Full Text- PDF] Grigoriadis, K. M., "L₂ and L₂-L_∞ Model Reduction via Linear Matrix Inequalities", International Journal of Control, Vol. 68, No. 3, pp. 485-498, 1997. Syrmos, V., Abdallah, C., Dorato, P. and Grigoriadis, K. M., "Static Output Feedback: A Survey," Automatica, Vol. 33, No. 2, pp. 125-137, 1997. [Full Text- PDF] Grigoriadis, K. M., and Skelton, R. E., "Minimum Energy Covariance Controllers," Automatica, Vol. 33, No. 4, pp. 569-578, 1997. [Full Text- PDF] Grigoriadis, K. M., and Skelton, R. E., "Low-order Control Design for LMI Problems Using Alternating Projections," Automatica, Vol. 32, No. 8, pp. 117-1125, 1996. [Full Text- PDF] Grigoriadis, K. M., Zhu, G. and Skelton, R. E., "Optimal Redesign for Linear Systems," ASME Journal of Dynamic, Systems, Measurement and Control, Vol. 118, pp. 598-605, 1996. Grigoriadis, K. M., and Skelton, R. E., "Alternating Convex Projection Methods for Discrete-Time Covariance Control Design," Journal of Optimization Theory and Applications, Vol. 88, No. 2, pp. 399-432, 1996. Grigoriadis, K. M., "Optimal H_∞ Model Reduction via Linear Matrix Inequalities," Systems & Control Letters, Vol. 26, pp. 321-333, 1995. [Full Text- PDF] Frazho, A. E., Grigoriadis, K. M, and Kherat S., "Alternating Projection Methods for Mixed H₂ and H_∞ Nehari Problems," IEEE Transactions on Automatic Control, Vol. 40, No. 12, pp. 2127-2131, 1995. Zhu, G., Grigoriadis, K. M., and Skelton, R. E., "Covariance Control Design for the Hubble Space Telescope," AIAA Journal of Guidance, Control and Dynamics, Vol. 18, No. 2, pp. 230-236, 1995. Grigoriadis, K. M., and Skelton, R. E., "Alternating Convex Projection Methods for Covariance Control Design," International Journal of Control, Vol. 60, No. 6, pp. 1083-1106, 1994. [Full Text- PDF] Grigoriadis, K. M., Frazho, A. E., and Skelton R. E., "Application of Alternating Convex Projection Methods for Computation of Positive Toeplitz Matrices," IEEE Transactions on Signal Processing, Vol. 42, No. 7, pp. 1873-1875, 1994. Yasuda, S., Skelton, R. E., and Grigoriadis, K. M., "Covariance Controllers: A New Parametrization of All Stabilizing Controllers," Automatica, Vol. 29, No. 3, pp. 785-788, 1993. Smith, M. J., Grigoriadis, K. M., and Skelton, R. E., "Optimal Mix of Passive and Active Control in Structures," AIAA Journal of Guidance, Control and Dynamics, Vol. 15, No. 4, pp. 912-919, 1992. Liu, K., Skelton, R. E., and Grigoriadis, K. M., "Optimal Controllers for Finite Wordlength Implementation," IEEE Transactions on Automatic Control, Vol. 37, No. 9, pp. 1294-1304, 1992.	Loughborough University - Visiting Professorship IASTED Intelligent Control Systems Conference 2008 - Conference Chair
N207, Engineering Building 1,Dept. of Mech. Engineering, University of Houston, Houston, TX 77204-4006