
Publications Selected works with PDFs
Selected works with PDFs

Y. Zhang, L. Qiu, “On the angular metrics between linear subspaces”, Linear Algebra and its Applications, vol. 421, no. 1, pp. 163170, 2007. >PDF




W. Su, L. Qiu and J. Chen, “Fundamental limit of discretetime systems in tracking multitone sinusoidal signals”, Automatica, vol. 43, no. 1, pp. 1530, 2007. >PDF 



L. Qiu, Y. Zhang, and C.K. Li, “Unitarily invariant metrics on the Grassmann space”, SIAM Journal on Matrix Analysis and Applications, vol. 27, pp. 507531, 2006. >PDF 



L. Chai and L. Qiu, “Multirate periodic systems and constrained analytical function interpolation problems”, SIAM Journal on Control and Optimization, vol. 43, pp. 19721986, 2005. >PDF 



W. C. Gan and L. Qiu, “Torque and velocity ripple elimination of AC permanent magnet motor control systems using the internal model principle”, IEEE/ASME Trans. on Mechatronics, vol. 9, pp. 436447, 2004. >PDF 



L. Qiu, “What can Routh table offer in addition to stability”, Journal of Control Theory and Applications, vol. 1, pp. 916, 2003. >PDF 



W. C. Gan, N. C. Cheung and L. Qiu, “Position control of linear switched reluctance motors for high precision applications”, IEEE Trans. on Industry Applications, vol. 39, pp. 13501362, 2003. >PDF 



W. Su, L. Qiu and J. Chen, “Fundamental performance limitations in tracking sinusoidal signals”, IEEE Trans. on Automatic Control, vol. 48, pp. 13711380, 2003. >PDF 



W. C. Gan and L. Qiu, “Design and analysis of a plugin robust compensator: an application to indirect fieldoriented control induction machine drives”, IEEE Trans. on Industrial Electronics, vol. 50, pp. 272282, 2003. >PDF 



Z. Ding and L. Qiu, “Blind MIMO channel identification from second order statistics using rank deficient channel convolution matrix”, IEEE Trans. on Signal Processing, vol. 51, pp. 535544, 2003. >PDF 



O. Toker, J. Chen and L. Qiu, “Tracking performance limitations in LTI multivariable discretetime systems”, IEEE Trans. Circuits and Systems, Part I: Fundamental Theory and Applications, vol. 49, pp. 657670, 2002. >PDF 



L. Qiu and T. Chen, “Multirate sampleddata systems: all H¥ suboptimal controllers and the minimum entropy controller”, IEEE Trans. on Automatic Control, vol. 44, pp. 537550, 1999. >PDF 



T. Chen, L. Qiu, and E. Bai, “General multirate building blocks and their application in nonuniform filter banks”, IEEE Trans. on Circuits and Systems, Part II: Analog and Digital Signal Processing, vol. 45, pp.948958, 1998. >PDF 



G. Gu and L. Qiu, “Connection of multiplicative or relative perturbation in coprime factors and gap metric uncertainty”, Automatica, Vol. 34, pp. 603607, 1998. >PDF 



B. Bernhardsson, A. Rantzer, and L. Qiu, “Real perturbation values and quadratic forms in a complex vector space”, Linear Algebra and its Applications, Vol. 270, pp. 131154, 1997. >PDF 



E. W. Bai, L. Qiu, and R. Tempo, “Unfalsified weigthed least squares estimates in setmembership identification”, IEEE Trans. on Circuits and Systems, Part I: Fundamental Theory and Applications, Vol. 45, pp. 4149, 1998. >PDF 



L. Qiu, B. Bernhardsson, A. Rantzer, E.J. Davison, P.M. Young, and J.C. Doyle, “A formula for computation of the real stability radius”, Automatica, vol. 31, pp. 879890, 1995. >PDF 



T. Chen, and L. Qiu, “H¥ design of general multirate sampleddata control systems”, Automatica, vol. 30, pp. 11391151, 1994. (PDF Missing) 



L. Qiu, and E.J. Davison, “Performance limitations of nonminimum phase systems in the servomechanism problem”, Automatica, vol. 29, pp. 337349, 1993. (PDF Missing) 



L. Qiu, and E.J. Davison, “Feedback stability under simultaneous gap metric uncertainties in plant and controller”, Systems & Control Letters, vol. 18, pp. 922, 1992. (PDF Missing) 



L. Qiu, and E.J. Davison, “Pointwise gap metrics on transfer matrices”, IEEE Trans. on Automatic Control, vol. 37, pp. 741758, 1992. >PDF 



L. Qiu, and E.J. Davison, “A unified approach for the stability robustness of polynomials in a convex set”, Automatica, vol. 28, pp. 945959, 1992. (PDF Missing) 

