Titlebook: Control Reconfiguration of Dynamical Systems; Linear Approaches an Thomas Steffen Book 2005 Springer-Verlag Berlin Heidelberg 2005 Control

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Literature Overview,leading to approaches that cannot be reasonably compared to each other. This overview tries to mention all approaches that are relevant for control reconfiguration in the sense defined in the introduction.

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Running Example: the 2-Tank System,ins two tanks connected by a valve and filled by a pump. The goal is to maintain a constant outflow of the system, which requires a constant level in the right tank. Although the system is simple (see Fig. 3.1), it is sufficient to demonstrate the relevant effects encountered with respect to reconfiguration.

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Reconfiguration Using a Virtual Actuator,t, and a dynamical reconfiguration block is necessary to solve this problem. The . for the reconfiguration after actuator faults is the dual approach to the use of a . after sensor faults (detailed in the Chap. 7

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Structural Models,ation of the signal paths) are not stored in the structural model. There are two main types of structural models developed by different communities: the structural matrix approach and the graph approach.

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Solvability of Disturbance Decoupling,both cases, the structural approach to the disturbance decoupling problem has advantages over the classical approach. It is simple to implement, and it is well suited for the specific problems typical for reconfiguration.

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Structural Solutions to Disturbance Decoupling,n output variable are cancelled out. The important aspect is that the output variable is decoupled not only from the disturbance, but also from all other control input variables. Therefore, this routine can be applied repeatedly until the system is completely decoupled (or there are no control inputs left).

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Reconfiguration of the 3-Tank System, . is constant. The relevant components of the system are shown in Fig. 16.2. The system is very similar to the one defined in the original publication of the 3-Tank Benchmark Problem by Heiming and Lunze [1999]. However, because a real experiment is used here, the identified parameters have to be used.

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Allgemeine Grundrechtsdogmatik,nalysis to specific aspects of the reconfiguration problem has already been shown in studies by Izadi-Zamanabadi et al. [1998] and Lorentzen et al. [2003], but this chapter tries to present a complete approach.