**Tingshu Hu**Professor

**College**Francis College of Engineering**Department**Electrical & Computer Eng**Phone**(978) 934-4374**Email**Tingshu_Hu@uml.edu

## Research Interests

Control Systems; Power Electronics; Energy Systems

Control Theory; Nonlinear systems; Lyapunov theory; optimization; Control design for power converters; battery modeling

## Education

**Ph D: Electrical & Computer Engineering**, (2001), University of Virginia - Virginia**MS: Electrical Engineering**, (1988), Tong University, China - China**BS: Electrical Engineering**, (1985), Shanghai Jiao Tong University, China - China

## Awards and Honors

- Teaching Excellence Award (2007)
*, Teaching - Department of Electrical and Computer Engineering, University of Massachusetts Lowell*

## Publications

- Wang, H., Tahan, M.,
**Hu, T.**(2016) "Effects of rest time on equivalent circuit model for a li-ion battery,"*Proceedings of the American Control Conference*2016-July: pp. 3101 - 3106 - Hu, T., Zheng, X., Lu, Z., Wang, B., Liu, X., Yang, L., Zhou, J., Ni, C. (2016) "Syntheses, crystal structures, thermal and spectra of two complexes containing bis (maleonitriledithiolate) nickelate (II) anion and di-substituted chlorobenzyl triphenylphosphinium cation,"
*Synthesis and Reactivity in Inorganic, Metal-Organic, and Nano-Metal Chemistry*just-accepted pp. 00–00 - Devarakonda, L.,
**Hu, T.**(2015) "Effects of rest time on discharge response and equivalent circuit model for a lead-acid battery,"*Journal of Power Sources*282: pp. 19-27 - Devarakonda, L.,
**Hu, T.**(2014) "Algebraic method for parameter identification of circuit models for batteries under non-zero initial condition,"*Journal of Power Sources*268: pp. 928-940 - Jung, H., Wang, H.,
**Hu, T.**(2014) "Control design for robust tracking and smooth transition in power systems with battery/supercapacitor hybrid energy storage devices,"*Journal of Power Sources*267: pp. 566-575 - Fassinou, F., Wang, H., Devarakonda, L.,
**Hu, T.**(2014) "Observer-based method for reduction of dc-link voltage ripple in two-stage boost inverters,"*Proceedings of the American Control Conference*pp. 4348-4353 - Devarakonda, L., Wang, H.,
**Hu, T.**(2014) "Parameter identification of circuit models for lead-acid batteries under non-zero initial conditions,"*Proceedings of the American Control Conference*pp. 4360-4365 **Hu, T.**, Jung, H. (2013) "Simple algorithms for determining parameters of circuit models for charging/discharging batteries,"*Journal of Power Sources*233: pp. 14-22- Jung, H., Conficoni, C., Tilli, A.,
**Hu, T.**(2013) "Modeling and control design for power systems driven by battery/supercapacitor hybrid energy storage devices,"*Proceedings of the American Control Conference*pp. 4283-4288 - Pham, H., Jung, H.,
**Hu, T.**(2012) "State-Space Approach to Modeling and Ripple Reduction in AC-DC Converters,"*Control Systems Technology, IEEE Transactions on*PP:99 pp. 1-1 **Hu, T.**(2011) "A Nonlinear-System Approach to Analysis and Design of Power-Electronic Converters With Saturation and Bilinear Terms,"*Power Electronics, IEEE Transactions on*26:2 pp. 399-410**Hu, T.**, Jung, H. (2011) "Estimation of Magnitude of Self-Induced Oscillations via Piecewise Quadratic Lyapunov Functions,"*Circuits and Systems I: Regular Papers, IEEE Transactions on*58:12 pp. 2872-2881**Hu, T.**, Zanchi, B., Zhao, J. (2011) "Simple Analytical Method for Determining Parameters of Discharging Batteries,"*Energy Conversion, IEEE Transactions on*26:3 pp. 787-798- Yao, Y., Fassinou, F.,
**Hu, T.**(2011) "Stability and robust regulation of battery-driven boost converter with simple feedback,"*IEEE Transactions on Power Electronics*26:9 pp. 2614-2626 **Hu, T.**, Thibodeau, T., Teel, A.R. (2010) "A unified lyapunov approach to analysis of oscillations and stability for systems with piecewise linear elements,"*IEEE Transactions on Automatic Control*55:12 pp. 2864-2869**Hu, T.**, Blanchini, F. (2010) "Non-conservative matrix inequality conditions for stability/stabilizability of linear differential inclusions,"*Automatica*46:1 pp. 190-196- Massimetti, M., Zaccarian, L.,
**Hu, T.**, Teel, A.R. (2009) "Linear discrete-time global and regional anti-windup: An LMI approach,"*International Journal of Control*82:12 pp. 2179-2192 - Dai, D.,
**Hu, T.**, Teel, A.R., Zaccarian, L. (2009) "Output feedback design for saturated linear plants using deadzone loops,"*Automatica*45:12 pp. 2917-2924 - Dai, D.,
**Hu, T.**, Teel, A.R., Zaccarian, L. (2009) "Piecewise-quadratic Lyapunov functions for systems with deadzones or saturations,"*Systems and Control Letters*58:5 pp. 365-371 - Thibodeau, T., Tong, W.,
**Hu, T.**(2009) "Set invariance and performance analysis of linear systems via truncated ellipsoids,"*Automatica*45:9 pp. 2046-2051 **Hu, T.**, Teel, A.R., Zaccarian, L. (2008) "Anti-windup synthesis for linear control systems with input saturation: Achieving regional, nonlinear performance,"*Automatica*44:2 pp. 512-519**Hu, T.**, Ma, L., Lin, Z. (2008) "Stabilization of Switched Systems via Composite Quadratic Functions,"*Automatic Control, IEEE Transactions on*53:11 pp. 2571-2585**Hu, T.**, Teel, A.R. (2007) "Characterization of Forced Vibration for Difference Inclusions: A Lyapunov Approach,"*Circuits and Systems I: Regular Papers, IEEE Transactions on*54:6 pp. 1367-1379**Hu, T.**(2007) "Nonlinear control design for linear differential inclusions via convex hull of quadratics,"*Automatica*43:4 pp. 685-692- Goebel, R., Teel, A.R.,
**Hu, T.**, Lin, Z. (2006) "Conjugate convex lyapunov functions for dual linear differential inclusions,"*IEEE Transactions on Automatic Control*51:4 pp. 661-666 **Hu, T.**, Teel, A.R., Zaccarian, L. (2006) "Stability and Performance for Saturated Systems via Quadratic and Nonquadratic Lyapunov Functions,"*Automatic Control, IEEE Transactions on*51:11 pp. 1770-1786**Hu, T.**, Lin, Z. (2005) "Absolute stability analysis of discrete-time systems with composite quadratic Lyapunov functions,"*Automatic Control, IEEE Transactions on*50:6 pp. 781-797**Hu, T.**, Goebel, R., Teel, A.R., Lin, Z. (2005) "Conjugate Lyapunov functions for saturated linear systems,"*Automatica*41:11 pp. 1949-1956**Hu, T.**, Lin, Z., Jiang, W., Allaire, P.E. (2005) "Constrained control design for magnetic bearing systems,"*Journal of Dynamic Systems, Measurement and Control, Transactions of the ASME*127:4 pp. 601-616**Hu, T.**, Teel, A.R., Lin, Z. (2005) "Lyapunov characterization of forced oscillations,"*Automatica*41:10 pp. 1723-1735**Hu, T.**, Lin, Z. (2004) "Controlled invariance of ellipsoids: Linear vs. nonlinear feedback,"*Systems and Control Letters*53:3-4 pp. 203-210**Hu, T.**, Lin, Z. (2004) "Output regulation of linear systems with bounded continuous feedback,"*IEEE Transactions on Automatic Control*49:11 pp. 1941-1953**Hu, T.**, Lin, Z., Allaire, P.E. (2004) "Reducing power loss in magnetic bearings by optimizing current allocation,"*IEEE Transactions on Magnetics*40:3 pp. 1625-1635**Hu, T.**, Lin, Z., Shamash, Y. (2003) "On maximizing the convergence rate for linear systems with input saturation,"*IEEE Transactions on Automatic Control*48:7 pp. 1249-1253**Hu, T.**, Lin, Z. (2003) "On the tightness of a recent set invariance condition under actuator saturation,"*Systems and Control Letters*49:5 pp. 389-399**Hu, T.**, Lin, Z., Chen, B.M. (2002) "An analysis and design method for linear systems subject to actuator saturation and disturbance,"*Automatica*38:2 pp. 351-359**Hu, T.**, Lin, Z., Qiu, L. (2002) "An explicit description of null controllable regions of linear systems with saturating actuators,"*Systems and Control Letters*47:1 pp. 65-78**Hu, T.**, Lin, Z. (2002) "Exact characterization of invariant ellipsoids for single input linear systems subject to actuator saturation,"*IEEE Transactions on Automatic Control*47:1 pp. 164-169**Hu, T.**, Miller, D.E., Qiu, L. (2002) "Null controllable region of LTI discrete-time systems with input saturation,"*Automatica*38:11 pp. 2009-2013**Hu, T.**, Lin, Z. (2002) "On improving the performance with bounded continuous feedback laws,"*IEEE Transactions on Automatic Control*47:9 pp. 1570-1575**Hu, T.**, Lin, Z. (2002) "On semiglobal stabilizability of antistable systems by saturated linear feedback,"*IEEE Transactions on Automatic Control*47:7 pp. 1193-1198**Hu, T.**, Lin, Z. (2002) "Output regulation of general discrete-time linear systems with saturation nonlinearities,"*International Journal of Robust and Nonlinear Control*12:13 pp. 1129-1143- Cao, Y., Lin, Z.,
**Hu, T.**(2002) "Stability analysis of linear time-delay systems subject to input saturation,"*IEEE Transactions on Circuits and Systems I: Fundamental Theory and Applications*49:2 pp. 233-240 **Hu, T.**, Lin, Z. (2001) "Practical stabilization of exponentially unstable linear systems subject to actuator saturation nonlinearity and disturbance,"*International Journal of Robust and Nonlinear Control*11:6 pp. 555-588- Lin, Z.,
**Hu, T.**(2001) "Semi-global stabilization of linear systems subject to output saturation,"*Systems and Control Letters*43:3 pp. 211-217 **Hu, T.**, Lin, Z., Shamash, Y. (2001) "Semi-global stabilization with guaranteed regional performance of linear systems subject to actuator saturation,"*Systems and Control Letters*43:3 pp. 203-210**Hu, T.**, Lin, Z., Qiu, L. (2001) "Stabilization of exponentially unstable linear systems with saturating actuators,"*IEEE Transactions on Automatic Control*46:6 pp. 973-979**Hu, T.**, Lam, J. (1999) "Improvement of parametric stability margin under pole assignment,"*IEEE Transactions on Automatic Control*44:10 pp. 1938-1942- Lam, J., Yan, W.,
**Hu, T.**(1999) "Pole assignment with eigenvalue and stability robustness,"*International Journal of Control*72:13 pp. 1165-1174 **Hu, T.**, Miller, D.E., Qiu, L. (1998) "Controllable regions of LTI discrete-time systems with input saturation,"*Proceedings of the IEEE Conference on Decision and Control*1: pp. 371-376**Hu, T.**, Qiu, L. (1998) "On structured perturbation of Hermitian matrices,"*Linear Algebra and Its Applications*275-176: pp. 287-314**Hu, T.**, Qiu, L., Lin, Z. (1998) "Stabilization of LTI systems with planar anti-stable dynamics using saturated linear feedback,"*Proceedings of the IEEE Conference on Decision and Control*1: pp. 389-394**Hu, T.**, Chen, L. (1996) "Gradient approach to H-optimization,"*Zidonghua Xuebao/Acta Automatica Sinica*22:2 pp. 145-153**Hu, T.**, Shi, S. (1995) "Continuity analysis of the robust stability radius and an optimization method,"*Kong Zhi Li Lun Yu Ying Yong/Control Theory and Applications*12:1 pp. 25-25**Hu, T.**, Shi, S., Zhang, Z. (1994) "New approach to robust design in time domain-on minimizing P] and V]V-1],"*Zidonghua Xuebao/Acta Automatica Sinica*20:2 pp. 129-137**Hu, T.**, Shi, S., Zhang, Z. (1991) "Optimizing a class of functionals related to sensitivity and robustness,"*Zidonghua Xuebao/Acta Automatica Sinica*17:5 pp. 596-596

## Contracts, Fellowships, Grants and Sponsored Research

- Control design of power electronic interfaces for optimal performance of renewable energy systems (2012),
*- National Science Foundation***Hu, T.**(Principal) - ARRA - Analysis of Nonlinear Oscillations via Lyapunov Approach (2009),
*Grant -***Hu, T.**(Principal) - Analysis of Nonlinear Oscillations via Lyapunov Approach (2009),
*- National Science Foundation***Hu, T.**(Principal) - Nonlinear/Switching Control Design for Constrained Control Systems with Application to Magnetic Suspension (2006),
*- National Science Foundation***Hu, T.**(Principal) - Research experience for undergraduates (2007),
*- National Science Foundation***Hu, T.**(Principal) - A Generalized Absolute Stability Approach to Dealing with Saturation Nonlinearities: Analysis, Design and Applications to Magnetic Bearing Systems (2003),
*- National Science Foundation***Hu, T.**(Co-Principal) - A Continuous Flow Centrifugal Ventricular Assist Device (2002),
*- Utah Artificial Heart Institute***Hu, T.**(Co-Principal)