利用動態灰色預測系統之控制設計與應用

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姓名

蔡孟儒(Meng-Ru Tsai) 查詢紙本館藏

畢業系所

電機工程學系

論文名稱

利用動態灰色預測系統之控制設計與應用
(The Design and Application of Control Using Dynamic Grey Prediction System)

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摘要(中)

本論文中，我們將討論動態灰色預測控制器的設計。我們嘗試著結合模糊理論、灰色預測控制以及基因演算法之優點來發展這樣的動態控制系統。我們將注意力集中在預測模式的變化轉換，不同於傳統方法以動態的預測步距選取為主。預測模式間的轉換及時機的規劃是我們設計的出發點，而且我們也會探討並非整個控制過程中都適合以預測的行為來控制系統，所以我們嘗試著去改變調整完整的控制器架構。最後由基因演算法來搜尋複雜的系統參數組合。藉由模擬的範例結果，我們可以發現所提出方法能使響應可以追蹤所期望的較佳之響應軌跡。

摘要(英)

In this thesis, we will discuss the dynamic grey prediction systems. We try to integrate the advantages of fuzzy theory, grey prediction control, and genetic algorithm to develop a dynamical prediction control system. We pay our attention to the switch of the distinct grey prediction modes. It is different from the traditional grey prediction systems that usually focus on the selection of dynamic prediction steps. Furthermore, we also analyze the opportune moments for forecasting the system behaviors. We can know that there is not all of the control processes suitable to implement the prediction control. So we should modify the framework of the controller. Finally, we use genetic algorithms to help us for designing such a complex system. From the results of simulated experiments, we can see that the proposed methods make the performance response to track the desired trajectory well.

關鍵字(中)

★ 灰色預測控制

關鍵字(英)

★ grey prediction control

論文目次

The Design and Application of Control Using Dynamic Grey Prediction System
Chapter 1 Introduction .................................. 1
1.1 Background .......................................... 1
1.2 Motivation........................................... 2
1.3 Organization ........................................ 3
Chapter 2 Grey Prediction .......................................... 4
2.1 Introduction .......................................... 4
2.2 The Mapped Generating and its Inverse Operator (MGO and IMGO) ........ 4
2.3 The Complete Prediction Process .......................................... 5
Chapter 3 Genetic Algorithm .......................................... 8
3.1 Introduction .......................................... 8
3.2 The Basic Operators in GA .......................................... 8
3.2.1 Reproduction .......................................... 9
3.2.2 Crossover .......................................... 9
3.2.3 Mutation .......................................... 10
3.3 Elite Method .......................................... 10
3.4 Reinforced Search Method .......................................... 11
Chapter 4 Application of a Dynamic Grey Prediction System Using Fuzzy Logic to
Switch the Prediction Modes ........................... 13
4.1 Introduction .......................................... 13
4.2 Grey Prediction Controller .......................................... 14
4.3 Genetic-based and Fuzzy-switching GPC ................................... 17
4.4 Simulation and Discussion .......................................... 20
4.5 Conclusion .......................................... 25
Chapter 5 An Alternative Approach for the Switching Grey Prediction Controller
.............. 26
5.1 Introduction .......................................... 26
5.2 Problem Formulation .......................................... 26
5.3 The Proposed Method .......................................... 29
5.4 Simulation .......................................... 31
5.5 Conclusion .......................................... 33
Chapter 6 Conclusions and Recommendations .............................. 34
References .......................................... 36
List of Figures
Fig. 2.1 The prediction procedure of a simple grey predictor ............. 6
Fig. 3.1 The complete flow chart of the genetic algorithm ................. 12
Fig. 4.1 The framework of a simple grey prediction controller ............ 14
Fig. 4.2 The output response of G(s) using a positive step in GPC ...... 15
Fig. 4.3 The output response of G(s) using a negative-step in GPC ....... 15
Fig. 4.4 The framework of the switching grey prediction PID controller ...... 16
Fig. 4.5 The Block Diagram of the Genctic-based and Fuzzy-switching GPC
controller .......................................... 17
Fig. 4.6 The fuzzy sets in the premise part of the fuzzy inference scheme ....18
Fig. 4.7 The fuzzy sets in the consequence part of the fuzzy inference
scheme .........18
Fig. 4.8 The step response of Gp(s) using GB-FSGPC method (9 parameters in
searching .......................................... 20
Fig. 4.9 The step response with kp in [5,15] ......................... 22
Fig. 4.10 The step response with wn=1 and wp=1 ............................ 23
Fig. 4.11 The system response with Ziegler-Nichols PID rules .............. 25
Fig. 5.1 The results of feeding Unit step signal into the stable plant Gp(s)
(Eq. 4.9 ) .......................................... 27
Fig. 5.2 The results of feeding Unit step signal into the unstable plant
Gu(s) ...................28
Fig. 5.3 The results of feeding an Inverse Unit step input signal into the
unstable plant .......................................... 29
Fig. 5.4 An Alternative Approach of the SGPC controller ................ 29
Fig. 5.5 The output response of controlling the Gp(s) by the proposed method
.......... 32
Fig. 5.6 The output response of controlling the unstable plant G2(s) ...... 33
List of Table
Table 4.1 The code length of the searched arguments in the proposed method
(GB-FSGPC) .......................................... 20
Table 4.2 The system parameters of Gp(s) using GB-FSGPC method .......... 21
Table 4.3 The performance indices of the system Gp(s) using GB-FSGPC design
.............. 21
Table 4.4 The searched results with kp in [5,15] ......................... 21
Table 4.5 The performance indices with kp in [5,15] ..................... 22
Table 4.6 The searching results with wn=1 and wp=1 ..................... 22
Table 4.7 The performance indices with wn=1 and wp=1 .................... 23
Table 4.8 The Ziegler-Nichols PID rules ................................ 24
Table 4.9 The system arguments with the Ziegler-Nichols rules .............. 24
Table 4.10 The performance indices with the Ziegler-Nichols rules ........... 25
Table 5.1 The system parameters of the design to control Gp(s) (a third-order
stable plant) .......................................... 31
Table 5.2 The performance indices of Gp(s) (a third-order stable plant) .... 31
Table 5.3 The system parameters of controlling the unstable plant G2(s)
( a third-order unstable plant ) ............................. 32
Table 5.4 The performance indices of controlling G2(s) ( a third-order unstable
plant ) .................................. 32

參考文獻

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指導教授

莊堯棠(Yau-Tarng Juang)

審核日期

2002-6-3

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