Identification and control—closed-loop issues
Automatica (Journal of IFAC) - Special issue on trends in system identification
A unifying theorem for three subspace system identification algorithms
Automatica (Journal of IFAC) - Special issue on trends in system identification
Subspace identification from closed loop data
Signal Processing - Special issue: subspace methods, part II: system identification
Matrix computations (3rd ed.)
System identification (2nd ed.): theory for the user
System identification (2nd ed.): theory for the user
Closed-loop identification using Laguerre orthogonal functions for a virtual diesel engine
International Journal of Computer Applications in Technology
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This paper introduces a novel modelling framework for identifying dynamic models of systems that are under feedback control. These models are identified under closed-loop conditions and produce a joint representation that includes both the plant and controller models in state space form. The joint plant/controller model is identified using subspace model identification (SMI), which is followed by the separation of the plant model from the identified one. Compared to previous research, this work (i) proposes a new modelling framework for identifying closed-loop systems, (ii) introduces a generic structure to represent the controller and (iii) explains how that the new framework gives rise to a simplified determination of the plant models. In contrast, the use of the conventional modelling approach renders the separation of the plant model a difficult task. The benefits of using the new model method are demonstrated using a number of application studies.