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Acknowledgements |
5 |
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Contents |
7 |
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List of Figures |
10 |
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List of Tables |
12 |
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Nomenclature |
13 |
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1 Introduction |
16 |
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1.1 Background and motivation |
16 |
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1.1.1 FDI and FTC in complex industrial systems |
17 |
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1.1.2 PnP control concept |
20 |
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1.2 Objective of the work |
21 |
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1.3 Outline of the thesis |
22 |
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2 Basics of Process Monitoring Techniques |
24 |
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2.1 Mathematical description of automatic control processes |
24 |
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2.1.1 Description of nominal system behavior |
24 |
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2.1.2 Coprime factorization technique |
25 |
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2.1.3 Description of systems with disturbances |
26 |
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2.1.4 Description of systems with faults |
26 |
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2.2 Model-based residual generation techniques |
27 |
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2.2.1 Kernel representation and fault detection filter |
27 |
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2.2.2 Diagnostic observer |
28 |
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2.2.3 Parity space approach |
29 |
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2.2.4 Interconnections between DO and PS schemes |
31 |
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2.3 Data-driven residual generation techniques |
32 |
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2.3.1 SIM-aided process monitoring |
32 |
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2.3.2 Data-driven design of residual generator |
33 |
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2.4 Residual evaluation and decision making |
35 |
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2.4.1 Residual evaluation strategies |
36 |
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2.4.2 Threshold setting and decision making |
37 |
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2.5 Multivariate statistical process monitoring techniques |
37 |
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2.6 Concluding remarks |
38 |
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3 Basics of FTC Structure |
39 |
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3.1 Standard feedback control structure |
39 |
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3.2 Well-posedness and internal stability |
40 |
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3.2.1 Well-posedness |
40 |
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3.2.2 Internal stability |
41 |
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3.3 Image representation and state feedback control |
43 |
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3.4 Parameterization of stabilizing controllers |
44 |
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3.5 Model uncertainty and robustness |
47 |
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3.5.1 Small gain theorem |
47 |
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3.5.2 Coprime factor uncertainty |
48 |
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3.6 The fault-tolerant control architecture |
51 |
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3.7 Concluding remarks |
53 |
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4 PnP Process Monitoring and Control Architecture |
54 |
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4.1 Problem formulation |
54 |
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4.2 Scalability of feedback control systems |
56 |
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4.3 The PnP process monitoring and control architecture |
59 |
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4.3.1 The PnP-PMCA |
59 |
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4.3.2 Comparison with the fault-tolerant control architecture |
61 |
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4.3.3 Industrial implementation of the PnP-PMCA |
63 |
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4.4 PnP control strategies for new actuators and sensors |
66 |
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4.4.1 PnP control strategy for new actuators |
66 |
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4.4.2 PnP control strategy for new sensors |
67 |
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4.5 Concluding remarks |
68 |
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5 Real-Time Configuration Techniques for PnP Process Monitoring |
69 |
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5.1 Adaptive observer-based configuration |
70 |
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5.1.1 The canonical forms of LTI state-space systems |
70 |
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5.1.2 Adaptive configuration approach |
72 |
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5.2 Iterative configuration approach |
79 |
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5.2.1 The input/output normal form |
81 |
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5.2.2 Iterative configuration approach |
84 |
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5.3 Process monitoring with deterministic disturbance |
91 |
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5.3.1 Preliminaries related to the model-based solution |
91 |
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5.3.2 A data-driven process monitoring approach |
93 |
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5.4 Concluding remarks |
95 |
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6 Real-Time Configuration Techniques for PnP Performance Optimization |
96 |
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6.1 Control performance assessment system |
96 |
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6.2 Internal stability of the PnP-PMCA |
99 |
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6.2.1 Closed-loop dynamics of the PnP-PMCA |
99 |
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6.2.2 Constraints on closed-loop internal stability |
101 |
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6.3 Control performance optimization in PnP-PMCA |
105 |
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6.3.1 Iterative robustness optimization |
105 |
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6.3.2 Iterative tracking performance optimization |
112 |
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6.4 Convergence analysis |
117 |
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6.5 Concluding remarks |
118 |
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7 Benchmark Study and Real-Time Implementation |
120 |
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7.1 Application to rolling mill benchmark |
120 |
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7.1.1 General description of rolling mill system |
120 |
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7.1.2 PnP process monitoring and disturbance compensation system |
124 |
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7.1.3 Roll eccentricity monitoring and compensation module |
125 |
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7.1.4 Case study and simulation results |
131 |
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7.2 Real-time implementation on BLDC motor test rig |
137 |
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7.2.1 Description of the test rig |
137 |
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7.2.2 HIL simulation result |
139 |
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7.3 Concluding remarks |
143 |
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8 Conclusions and Future Work |
145 |
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A Proof of Theorem 4.2 |
147 |
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Bibliography |
150 |
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