By Thomas Steffen
Reconfiguration, an strategy for fault-tolerant keep an eye on, consists of altering the keep watch over constitution according to the fault. This monograph extends this concept to actuator faults and reports intimately the so-called digital actuator technique. "Control Reconfiguration of Dynamical platforms" additionally introduces structural research as a device for reconfiguration. simply because a fault adjustments the constitution of the method, the reconfiguration answer is sought on a structural point. Novel algorithms are awarded to check for reconfigurability and to discover a reconfiguration answer. A MATLAB toolbox is equipped, which incorporates the most algorithms and examples. The publication addresses complex engineering scholars, builders and researchers that experience a particular curiosity up to speed reconfiguration.
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Extra resources for Control Reconfiguration of Dynamical Systems: Linear Approaches and Structural Tests
The reconﬁguration problem for the 2-Tank system can be deﬁned using the reconﬁguration goals deﬁned in Sect. 5. 1) is obviously necessary for a successful reconﬁguration, since an unstable loop would imply that a tank becomes empty or ﬂows over in the long run. The objective of the system also includes a “reasonably short” settling time. This is a specialisation of the stabilisation goal, because the system is not only required to converge, but to do so reasonably fast. It requires that all states of the plant be controlled, since the open-loop behaviour is not fast enough.
5 . 2c) y=x z = x2 . 25. 3 Controller For normal operation, two proportional controllers are used. The ﬁrst controls the level x1 of the left tank using the pump u1 . The second controller uses the connection valve u2 to control the level x2 of the right tank. 3) 0 10 where w= w1 w2 is the reference input for the levels of the two tanks. The control structure is shown in Fig. 2. 74 0 y=x z = x2 . 75. 2. 4 Faults Three faults are considered: 1. 4a) 2. 4b) 3. loss of sensor y1 (sensor data not available, ﬁll with 0 instead): y1 = 0 = x1 .
Only the minimal number of signals is used, and the deﬁnition is kept strictly within the theory of continuous (linear or nonlinear) time-invariant systems. On the other hand, as few assumptions as possible are made during the problem formulation, so as to keep it as general as possible. The chapter starts with a deﬁnition of the system to reconﬁgure. The behaviour both before and after the occurrence of the fault is considered. The separation of the system into plant and controller is introduced, followed by the concept of the reconﬁguration block.
Control Reconfiguration of Dynamical Systems: Linear Approaches and Structural Tests by Thomas Steffen