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Multi-layer switching structure with periodic feedback control

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3 Author(s)
Zahirazami, S. ; Dept. of Electr. & Comput. Eng., Concordia Univ., Montreal, Que. ; Karuei, I. ; Aghdam, A.G.

In this paper, a novel switching control architecture for linear time-invariant (LTI) systems using generalized sampled-data hold functions (GSHF) is proposed to reduce the magnitude of the transient response. It is assumed that the plant model belongs to a finite set of known models. The output of the system is periodically sampled and a control signal is being generated by using a suitable hold function from a set of GSHFs. A control architecture consisting of a layer of high-performance GSHFs (one for each plant model) and some other layers of simultaneous stabilizing GSHFs is introduced. It is shown that using the above sets of GSHFs and a proper switching path, one can reduce the number of switchings to destabilizing GSHFs. As a result, the transient performance which is the main shortcoming of most switching control schemes is improved using the proposed strategy. Furthermore, it is shown that using GSHFs instead of continuous-time controllers reduces the complexity of online computations required to obtain the upperbound signals. Simulation results show the effectiveness of the proposed method in improving the transient performance

Published in:

American Control Conference, 2006

Date of Conference:

14-16 June 2006