Set-point Tracking Semi-Automatic Control of Interconnected Systems with Local Input Disturbances

Publisher:
Engineers Australia & IEEE
Publication Type:
Conference Proceeding
Citation:
Proceedings of the 2011 Australian Control Conference, 2011, pp. 224 - 229
Issue Date:
2011-01
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This paper presents the novel concept of incrementally accumulative quadratic constraint (IAQC) and its use in the constrained stabilisation for complex interconnected systems in set-point control (set-point tracking) schemes. IAQC is an incremental and discrete-time version of the integral quadratic constraint (IQC) in the time domain. A constructive method of stabilising agents for use with decentralised model predictive controllers (MPC) in semi-automatic modes is subsequently introduced. Here, the nonzero set-point control and local disturbances are effectively dealt with by employing a quadratical dissipativity criterion w.r.t control inputs and plant outputs, and a norm bounded gain for the disturbance input and plant output pair. The procedure of IAQC-based stabilising agents accommodates the coexistence of feedback control and manin- the-loop regulation. The multiplier matrices of the IAQC are updated on-the-fly to assure the constrained feasibility. The control application of a counter-current washing circuit in a hydrometallurgical process is simulated to illustrate the viability of the presented stabilising agent.
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