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• Journal article
  Lee STS, Chung HSH, Hui SYR, 2003,

  An electrode power control scheme for dimmable electronic ballasts

  , IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS, Vol: 50, Pages: 1335-1337, ISSN: 0278-0046
  • Cite
  • Citations: 6
• Journal article
  Chryssochoos I, Vinter RB, 2003,

  Optimal control problems on manifolds: a dynamic programming approach

  , JOURNAL OF MATHEMATICAL ANALYSIS AND APPLICATIONS, Vol: 287, Pages: 118-140, ISSN: 0022-247X
  • Author Web Link
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  • Citations: 12
• Journal article
  Yip SC, Qiu DY, Chung HSH, Hui SYRet al., 2003,

  A novel voltage sensorless control technique for a bidirectional AC/DC converter

  , IEEE TRANSACTIONS ON POWER ELECTRONICS, Vol: 18, Pages: 1346-1355, ISSN: 0885-8993
  • Cite
  • Citations: 19
• Journal article
  Karagiannis D, Mendes E, Astolfi A, Ortega Ret al., 2003,

  An experimental comparison of several PWM controllers for a single-phase AC-DC converter

  , IEEE TRANSACTIONS ON CONTROL SYSTEMS TECHNOLOGY, Vol: 11, Pages: 940-947, ISSN: 1063-6536
  • Author Web Link
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  • Citations: 27
• Journal article
  Arutyunov AV, Vinter RB, 2003,

  A finite-dimensional approximation method in optimal control theory

  , DIFFERENTIAL EQUATIONS, Vol: 39, Pages: 1519-1528, ISSN: 0012-2661
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• Journal article
  Green TC, Hernández-Arámburo CA, Smith AC, 2003,

  Losses in grid and inverter supplied induction machine drives

  , IEE PROCEEDINGS-ELECTRIC POWER APPLICATIONS, Vol: 150, Pages: 712-724, ISSN: 1350-2352
  • Author Web Link
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  • Citations: 25
• Journal article
  Angeli D, Sontag ED, Wang Y, 2003,

  Input to state stability with respect to inputs and their derivatives

  , International Journal of Robust and Nonlinear Control, Vol: 13, Pages: 1035-1056
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• Journal article
  Prieur C, Astolfi A, 2003,

  Robust stabilization of chained systems via hybrid control

  , IEEE TRANSACTIONS ON AUTOMATIC CONTROL, Vol: 48, Pages: 1768-1772, ISSN: 0018-9286
  • Author Web Link
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  • Citations: 88
• Journal article
  Vinter RB, Zheng H, 2003,

  Some finance problems solved with nonsmooth optimization techniques

  , JOURNAL OF OPTIMIZATION THEORY AND APPLICATIONS, Vol: 119, Pages: 1-18, ISSN: 0022-3239
  • Author Web Link
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  • Citations: 4
• Journal article
  Angeli D, Sontag ED, 2003,

  Monotone Control Systems

  , IEEE Transactions on Automatic Control, Vol: 48, Pages: 1684-1698
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• Journal article
  Galbraith GN, Vinter RB, 2003,

  Optimal control of hybrid systems with an infinite set of discrete states

  , J DYN CONTROL SYST, Vol: 9, Pages: 563-584, ISSN: 1079-2724

  Hybrid control systems are described by a family of continuous subsystems and a set of logic rules for switching between them. This paper concerns a broad class of optimization problems for hybrid systems, in which the continuous subsystems are modelled as differential inclusions. The formulation allows endpoint constraints and a general objective function that includes "transaction costs" associated with abrupt changes of discrete and continuous states, and terms associated with continuous control action as well as the terminal value of the continuous state. In consequence of the endpoint constraints, the value function may be discontinuous. It is shown that the collection of value functions (associated with all discrete states) is the unique lower semicontinuous solution of a system of generalized Bensoussan-Lions type quasi-variational inequalities, suitably interpreted for nondifferentiable, extended valued functions. It is also shown how optimal strategies and value functions are related. The proof techniques are system theoretic, i.e., based on the construction of state trajectories with suitable properties. A distinctive feature of the analysis is that it permits an infinite set of discrete states.

  • Abstract
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• Journal article
  Antonelli R, Astolfi A, 2003,

  Continuous stirred tank reactors: easy to stabilise?

  , AUTOMATICA, Vol: 39, Pages: 1817-1827, ISSN: 0005-1098
  • Author Web Link
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  • Citations: 65
• Conference paper
  Mitcheson PD, Stark BH, Miao P, Yeatman EM, Holmes AS, Green TCet al., 2003,

  Analysis and optimisation of MEMS electrostatic on-chip power supply for self-powering of slow-moving sensors

  , Guimaraes, Eurosensors 03, 17th European conference on sensors and actuators, University of Minho Guimaraes, Portugal, 21 - 24 September 2003, Publisher: University of Minho, Pages: 48-51
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• Journal article
  Green TC, Marks JH, 2003,

  Ratings of active power filters

  , IEE PROCEEDINGS-ELECTRIC POWER APPLICATIONS, Vol: 150, Pages: 607-614, ISSN: 1350-2352
  • Author Web Link
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  • Citations: 16
• Journal article
  Lu HY, Zhu JG, Hui SYR, 2003,

  Experimental determination of stray capacitances in high frequency transformers

  , IEEE TRANSACTIONS ON POWER ELECTRONICS, Vol: 18, Pages: 1105-1112, ISSN: 0885-8993
  • Cite
  • Citations: 177
• Journal article
  Chaudhuri B, Pal BC, Zolotas AC, Jaimoukha IM, Green TCet al., 2003,

  Mixed-sensitivity approach to <i>H</i>_∞ control of power system oscillations employing multiple FACTS devices

  , IEEE TRANSACTIONS ON POWER SYSTEMS, Vol: 18, Pages: 1149-1156, ISSN: 0885-8950
  • Author Web Link
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  • Citations: 123
• Journal article
  Valtolina E, Astolfi A, 2003,

  Local robust regulation of chained systems

  , SYSTEMS & CONTROL LETTERS, Vol: 49, Pages: 231-238, ISSN: 0167-6911
  • Cite
  • Citations: 22
• Conference paper
  Chaudhuri B, Pal BC, Zolotas AC, Jaimoukha IM, Green TCet al., 2003,

  Mixed-Sensitivity Approach to H-infinity Control of Power System Oscillations Employing Multiple FACTS Devices

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• Journal article
  Yan W, Hui SYR, Chung H, 2003,

  Nonlinear high-intensity discharge lamp model including a dynamic electrode voltage drop

  , IEE PROCEEDINGS-SCIENCE MEASUREMENT AND TECHNOLOGY, Vol: 150, Pages: 161-167, ISSN: 1350-2344
  • Cite
  • Citations: 23
• Conference paper
  Chaudhuri B, Green TC, Jaimoukha IM, Pal BC, Zolotas ACet al., 2003,

  Mixed-sensitivity approach to h(infinity) control of power system oscillations employing multiple facts devices

  , General meeting of IEEE Power Engineering Society, Toronto, Canada, Publisher: IEEE, Pages: 2348-2348
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• Journal article
  Qiu DY, Yip SC, Chung HSH, Hui SYRet al., 2003,

  On the use of current sensors for the control of power converters

  , IEEE TRANSACTIONS ON POWER ELECTRONICS, Vol: 18, Pages: 1047-1055, ISSN: 0885-8993
  • Cite
  • Citations: 16
• Journal article
  Lee CK, Leung JSK, Hui SYR, Chung HSHet al., 2003,

  Circuit-level comparison of STATCOM technologies

  , IEEE TRANSACTIONS ON POWER ELECTRONICS, Vol: 18, Pages: 1084-1092, ISSN: 0885-8993
  • Cite
  • Citations: 90
• Journal article
  Antonelli R, Harmand J, Steyer JP, Astolfi Aet al., 2003,

  Set-point regulation of an anaerobic digestion process with bounded output feedback

  , IEEE TRANSACTIONS ON CONTROL SYSTEMS TECHNOLOGY, Vol: 11, Pages: 495-504, ISSN: 1063-6536
  • Author Web Link
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  • Citations: 52
• Journal article
  Jabr RA, Pal BC, 2003,

  Iteratively re-weighted least absolute value method for state estimation

  , IEE P-GENER TRANSM D, Vol: 150, Pages: 385-391, ISSN: 1350-2360

  A modified version of the weighted least absolute value (WLAV) method for the solution of the power system-state-estimation problem is presented. The WLAV method can be seen as minimising a linear objective function subject to a set of nonlinear constraints. The modification is aimed at producing a WLAV estimator that remains insensitive to bad data, even if they are associated with leverage-point measurements. This is achieved by bending the linear objective function, so that the residuals of bad measurements are allowed to grow without incurring much additional cost in the objective function. Consequently, the optimisation procedure would find an optimal solution where the residuals of all bad measurements are nonzero. The optimisation is carried out via sequential linear programming. It is shown that each linear program corresponds to a linearised WLAV problem with weights adjusted automatically during the iterations. To ensure fast execution time, the linear program is solved using a homogeneous interior-point method. Computational results show that the proposed method can identify bad data in leverage points.

  • Abstract
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• Journal article
  Ortega R, Hsu L, Astolfi A, 2003,

  Immersion and invariance adaptive control of linear multivariable systems

  , SYSTEMS & CONTROL LETTERS, Vol: 49, Pages: 37-47, ISSN: 0167-6911
  • Cite
  • Citations: 77
• Journal article
  Chung HSH, Tse KK, Hui SYR, Mok CM, Ho MTet al., 2003,

  A novel maximum power point tracking technique for solar panels using a SEPIC or Cuk converter

  , IEEE TRANSACTIONS ON POWER ELECTRONICS, Vol: 18, Pages: 717-724, ISSN: 0885-8993
  • Cite
  • Citations: 141
• Journal article
  Karagiannis D, Astolfi A, Ortega R, 2003,

  Two results for adaptive output feedback stabilization of nonlinear systems

  , AUTOMATICA, Vol: 39, Pages: 857-866, ISSN: 0005-1098
  • Cite
  • Citations: 58
• Conference paper
  Chisci L, Falugi P, Zappa G, 2003,

  Tracking of piecewise constant references for constrained nonlinear systems

  , Pages: 886-891

  The paper addresses tracking of a piecewise constant reference for a nonlinear system subject to control and/or state constraints. The proposed controller, called dual-mode, extends to the nonlinear case an approach formerly introduced for linear systems. The dual-mode controller is based on the knowledge of the set of feasible state-setpoint pairs and operates in two different modes: as a regulator if the current state is feasible for the desired set-point, or attempts to recover feasibility as quickly as possible whenever feasibility is lost due to a set-point change. The difficulty of constructing the feasibility set in the state-setpoint space for a nonlinear system is overcome by embedding the original system into a family of uncertain (polytopic) linear systems.

  • Abstract
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  • Citations: 2
• Journal article
  Astolfi A, Ortega R, 2003,

  Immersion and invariance: A new tool for stabilization and adaptive control of nonlinear systems

  , IEEE TRANSACTIONS ON AUTOMATIC CONTROL, Vol: 48, Pages: 590-606, ISSN: 0018-9286
  • Author Web Link
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  • Citations: 617
• Conference paper
  Halikias GD, Jaimoukha IM, 2003,

  Design of infinite impulse response (IIR) filters with almost linear phase characteristics

  • Cite

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