Spis treści Front Cover 2 Linear Equations and Quadratic Criteria 7 Copyright Page 8 INTRODUCTION 9 Table of Contents 13 Chapter 1. WHAT IS CONTROL THEORY? 21 1.1. Introduction 21 1.2. Systems 22 1.3. Schematics 22 1.5. The Behavior of Systems 24 1.4. Mathematical Systems 24 1.6. Improvement of the Behavior of Systems 25 1.7. More Detailed Breakdown 26 1.8. Uncertainty 27 1.9. Conclusion 27 Front Cover 2 Linear Equations and Quadratic Criteria 7 Copyright Page 8 INTRODUCTION 9 Table of Contents 13 Chapter 1. WHAT IS CONTROL THEORY? 21 1.1. Introduction 21 1.2. Systems 22 1.3. Schematics 22 1.5. The Behavior of Systems 24 1.4. Mathematical Systems 24 1.6. Improvement of the Behavior of Systems 25 1.7. More Detailed Breakdown 26 1.8. Uncertainty 27 1.9. Conclusion 27 BIBLIOGRAPHY AND COMMENTS 28 Chapter 2. SECOND-ORDER UNEAR DIFFERENTIAL AND DIFFERENCE EQUATIONS 30 2.2. Second-Order Linear Differential Equations with Constant Coefficients 30 2.1. Introduction 30 2.3. The Inhomogeneous Equation 32 2.4. Two-Point Boundary Conditions 33 2.5. First-Order Linear Differential Equations with Variable Coefficients 34 2.6. The Riccati Equation 35 2.7. Linear Equations with Variable Coefficients 37 2.8. The Inhomogeneous Equation 38 2.9. Green's Function 40 2.10. Linear Systems 42 2.11. Difference Equations 43 Miscellaneous Exercises 45 BIBLIOGRAPHY AND COMMENTS 47 Chapter 3. STABILITY AND CONTROL 48 3.1 Introduction 48 3.2. Stability 50 3.3. Numerical Solution and Stability 53 3.4. Perturbation Procedures 54 3.5. A Fundamental Stability Theorem 56 3.7. Stability by Control 57 3.6. Stability by Design 57 3.8. Proportional Control 59 3.9. Discussion 60 3.10. Analytic Formulation 61 3.11. One-Dimensional Systems 62 Miscellaneous Exercises 64 BIBLIOGRAPHY AND COMMENTS 66 Chapter 4. CONTINUOUS VARIATIONAL PROCESSES; CAICULUS OF VARIATIONS 69 4.1. Introduction 69 4.2. Does a Minimum Exist? 70 4.3. The Euler Equation 72 4.4. A Fallacious Argument 74 4.5. Haar's Device 74 4.6. Solution of the Euler Equation 75 4.7. Minimizing Property of the Solution 76 4.9. Asymptotic Control 77 4.8. Alternative Approach 77 4.10. Infinite Control Process 79 4.11. The Minimum Value of J(u) 80 4.12. Two-Point Constraints 82 4.13. Terminal Control 83 4.14. The Courant Parameter 85 4.15. Successive Approximations 85 4.16. min ∫t0 [u2 + g(t)u2] dt 87 4.17. Discussion 89 4.18. The Simplicity of Control Processes 89 4.19. Discussion 91 4.20. The Minimum Value of j(u) 92 4.21. A Smoothing Process 92 4.22. Variation-Diminishing Property of Green's Function 94 4.23. Constraints 96 4.25. Monotonicity in λ 97 4.24. Minimizing Property 97 4.26. Proof of Monotonicity 98 4.27. Discussion 99 4.28. More General Quadratic Variational Problems 99 4.29. Variational Procedure 100 4.30. Proof of Minimum Property 101 4.31. Existence and Uniqueness 102 4.32. The Adjoint Operator 102 4.33. Sturm-Liouville Theory 105 4.34. Minimization by Means of Inequalities 107 4.35. Multiple Constraints 108 4.36. Unknown External Forces 110 Miscellaneous Exercises 111 BIBLIOGRAPHY AND COMMENTS 119 Chapter 5. DYNAMIC PROGRAMMING 121 5.2. Control as a Multistage Decision Process 121 5.1. Introduction 121 5.3. Preliminary Concepts 123 5.4. Formalism 124 5.5. Principle of Optimality 127 5.6. Discussion 128 5.7. Simplification 129 5.8. Validation 129 5.10. Limiting Behavior as T→∞ 130 5.9. Infinite Process 130 5.11. Two-Point Boundary Problems 132 5.12. Time-Dependent Control Process 133 5.13. Global Constraints 134 5.14. Discrete Control Processes 136 5.15. Preliminaries 137 5.16. Recurrence Relation 137 5.17. Explicit Recurrence Relations 138 5.18. Behavior of rN 139 5.20. Equivalent Linear Relations 140 5.19. Approach to Steady-State Behavior 140 5.21. Local Constraints 141 5.22. Continuous as Limit of Discrete 143 5.23. Bang-Bang Control 144 5.24. Control in the Presence of Unknown Influences 145 5.25. Comparison between Calculus of Variations and Dynamic Programming 146 Miscellaneous Exercises 147 BIBLIOGRAPHY AND COMMENTS 155 Chapter 6. REVIEW OF MATRIX THEORY AND LINEAR DIFFERENTIAL EQUATIONS 158 6.1. Introduction 158 6.2. Vector-Matrix Notation 159 6.3. Inverse Matrix 160 6.4. The Product of Two Matrices 161 6.5. Inner Product and Norms 163 6.6. Orthogonal Matrices 165 6.7. Canonical Representation 166 6.8. Det A 167 6.9. Functions of a Symmetric Matrix 167 6.10. Positive Definite Matrices 169 6.11. Representation of A 170 6.12. Differentiation and Integration of Vectors and Matrices 171 6.14. Existence and Uniqueness Proof 172 6.13. The Matrix Exponential 172 6.15. Euler Technique and Asymptotic Behavior 176 6.16. x" - A(t)x = 0 177 6.17. x' = Ax + By, y' = Cx + Dy 178 6.19. dX/dt = AX + XB, X(0) = C 179 6.18. Matrix Riccati Equation 179 Miscellaneous Exercises 180 BIBLIOGRAPHY AND COMMENTS 184 Chapter 7. MULTIDIMENSIONAL CONTROL PROCESSES VIA THE CALCULUS OF VARIATIONS 185 7.1. Introduction 185 7.2. The Euler Equation 186 7.3. The Case of Constant A 187 7.5. The Minimum Value 189 7.4. Nonsingularity of cosh ST 189 7.6. Asymptotic Behavior 190 7.8. The Nonsingularity of X2'(T) 191 7.7. Variable A(t) 191 7.9. The Minimum Value 192 7.10. Computational Aspects 193 7.11. min ∫T0 [(x, x) + (y, y)] dt, x' = Bx + y, x(0) = c 194 Miscellaneous Exercises 195 Chapter 8. MULTIDIMENSIONAL CONTROL PROCESSES VIA DYNAMIC PROGRAMMING 198 8.1. Introduction 198 8.2. ∫T0 [(x', x') + (x, Ax)] dt 199 8.3. The Associated Riccati Equation 200 8.4. Asymptotic Behavior 201 8.5. Rigorous Aspects 202 8.6. Time-Dependent Case 202 8.7. Computational Aspects 203 8.8. Successive Approximations 204 8.9. Approximation in Policy Space 205 8.10. Monotone Convergence 206 8.11. Partitioning 207 8.12. Power Series Expansions 208 8.13. Extrapolation 209 8.14. Minimization via Inequalities 211 8.15. Discrete Control Processes 213 8.16. Ill-Conditioned Linear Systems 215 8.17. Lagrange Multipliers 218 8.18. Reduction of Dimensionality 219 8.19. Successive Approximations 222 8.20. Distributed Parameters 224 8.21. Slightly Intertwined Systems 225 Miscellaneous Exercises 228 BIBLIOGRAPHY AND COMMENTS 234 Chapter 9. FUNCTIONAL ANALYSIS 237 9.1. Motivation 237 9.2. The Hilbert Space L2(0, T) 238 9.3. Inner Products 239 9.5. Vector Hilbert Space 240 9.4. Linear Operators 240 9.6. Quadratic Functionals 241 9.7. Existence and Uniqueness of a Minimizing Function 242 9.8. The Equation for the Minimizing Function 244 9.9. Application to Differential Equations 246 9.10. Numerical Aspects 247 9.11. A Simple Algebraic Example 248 9.12. The Equation x + λBx = c 249 9.13. The Integral Equation ƒ(t) + λ∫T0 K(t, t1)ƒ(t1) dt1 = g(t) 251 9.14. Lagrange Multipliers 251 9.15. The Operator Ra 252 9.16. Control Subject to Constraints 254 9.17. Properties of φ(c) and Ψ(c) 256 9.18. Statement of Result 256 Miscellaneous Exercises 257 BIBLIOGRAPHY AND COMMENTS 260 AUTHOR INDEX 261 SUBJECT INDEX 263 Pokaż więcej