Chuang Liu – författare

Spacecraft Attitude Control: A Linear Matrix Inequality Approach solves problemsfor spacecraft attitude control systems using convex optimization and, specifi cally,through a linear matrix inequality (LMI) approach. High-precision pointing and improvedrobustness in the face of external disturbances and other uncertainties are requirementsfor the current generation of spacecraft. This book presents an LMI approach to spacecraftattitude control and shows that all uncertainties in the maneuvering process can besolved numerically. It explains how a model-like state space can be developed through amathematical presentation of attitude control systems, allowing the controller in question tobe applied universally. The authors describe a wide variety of novel and robust controllers,applicable both to spacecraft attitude control and easily extendable to second-ordersystems. Spacecraft Attitude Control provides its readers with an accessible introductionto spacecraft attitude control and robust systems, giving an extensive survey of currentresearch and helping researchers improve robust control performance.

Considers the control requirements of modern spacecraft Presents rigid and flexible spacecraft control systems with inherent uncertainties mathematically, leading to a model-like state space Develops a variety of novel and robust controllers directly applicable to spacecraft control as well as extendable to other second-order systems Includes a systematic survey of recent research in spacecraft attitude control

Spacecraft Attitude Control: A Linear Matrix Inequality Approach solves problemsfor spacecraft attitude control systems using convex optimization and, specifi cally,through a linear matrix inequality (LMI) approach. High-precision pointing and improvedrobustness in the face of external disturbances and other uncertainties are requirementsfor the current generation of spacecraft. This book presents an LMI approach to spacecraftattitude control and shows that all uncertainties in the maneuvering process can besolved numerically. It explains how a model-like state space can be developed through amathematical presentation of attitude control systems, allowing the controller in question tobe applied universally. The authors describe a wide variety of novel and robust controllers,applicable both to spacecraft attitude control and easily extendable to second-ordersystems. Spacecraft Attitude Control provides its readers with an accessible introductionto spacecraft attitude control and robust systems, giving an extensive survey of currentresearch and helping researchers improve robust control performance.- Considers the control requirements of modern spacecraft- Presents rigid and flexible spacecraft control systems with inherent uncertainties mathematically, leading to a model-like state space- Develops a variety of novel and robust controllers directly applicable to spacecraft control as well as extendable to other second-order systems- Includes a systematic survey of recent research in spacecraft attitude control

Impact Mechanics of Ceramic Armor: Dwell and Interface Defeat provides a thorough overview of the impact dynamics of projectiles and targets, crack propagation, and damage evolution of ceramic armor during interface defeat and penetration. The book provides experimental techniques and results of ceramic armor subjected to projectile damage, covers the mechanics of damage of ceramic armor under impact load, and analyzes the failure processes alongside corresponding theoretical models. Constitutive models and material parameters between projectile and target are explained, techniques for optimum ceramic armor design are outlined, and applications of interface defeat in the field of light armor are provided.

Explains the impact dynamics of projectiles and targets, crack propagation, and damage evolution of ceramic armorSummarizes experimental techniques and discusses the results of ceramic armor subjected to projectile damageDiscusses the mechanisms of damage of ceramic armor under impact load and interface defeat, observing the failure process and providing corresponding theoretical modelsProvides insights into how to design ceramic composite armor that will withstand certain projectiles

Impact Mechanics of Ceramic Armor: Dwell and Interface Defeat provides a thorough overview of the impact dynamics of projectiles and targets, crack propagation, and damage evolution of ceramic armor during interface defeat and penetration. The book provides experimental techniques and results of ceramic armor subjected to projectile damage, covers the mechanics of damage of ceramic armor under impact load, and analyzes the failure processes alongside corresponding theoretical models. Constitutive models and material parameters between projectile and target are explained, techniques for optimum ceramic armor design are outlined, and applications of interface defeat in the field of light armor are provided.- Explains the impact dynamics of projectiles and targets, crack propagation, and damage evolution of ceramic armor- Summarizes experimental techniques and discusses the results of ceramic armor subjected to projectile damage- Discusses the mechanisms of damage of ceramic armor under impact load and interface defeat, observing the failure process and providing corresponding theoretical models- Provides insights into how to design ceramic composite armor that will withstand certain projectiles

Spacecraft Electromagnetic Docking and Separation solves problems for spacecraft electromagnetic docking and separation control systems using different control methods instead of the widely used proportional-integral-derivative controller or PID control. The book focuses on presenting a variety of control strategies tailored for spacecraft electromagnetic docking and separation that are accompanied by stability proofs that integrate Lyapunov stability theory with sliding mode theory, LMIs-based theorems, model predictive control theories, reinforcement study theories, and other frameworks so the reader can understand how to handle different kinds of disturbances and perturbations in actual orbiting spacecraft.The book also provides a review of magnetic field, the magnetic field force model (both the near-field model and the far-field model), and useful lemmas and dynamic modeling methods of spacecraft relative motion that can serve as first stage analysis for further research, and are especially important in the initial design phase of a spacecraft electromagnetic docking and separation control systems.Covers a wide variety of novel robust and non-fragile controllers against a backdrop of various uncertainties, e.g., advanced sliding mode control, observer-based control, model predictive control, reinforcement study-based control, and impedance controlDiscusses the mathematical representation of spacecraft electromagnetic docking and separation control systems with embedded uncertaintiesDelves into how control systems achieve high-precision position and better robustness to external disturbances (plus various uncertainties and gain perturbations) and how they can be achieved

This book deals with models and model-building in classical and quantum physics; it relies on logic and the philosophy of science as well as on modern mathematics. The reader will also find vistas into the history of ideas. The philosophical analysis is based on the separation of syntax and semantics, which is at the root of Kolmogorov's theory of probability; recursive functions and algorithmic complexity are used to discuss entropy and randomness. Basic concepts are discussed, together with concrete physical models for phase transitions, scaling, renormalization semigroups, and the irreversible approach to equilibrium. The book is intended for mathematicians, physicists and philosophers of science, both researchers and graduate students.

This book addresses several of the foundational problems in thermophysics, i. e. thermodynamics and statistical mechanics. It is an interdisciplinary work in that it examines the philosophical underpinning of scientific models and theories; it also refines the analysis of the problems at hand and delineates the place occupied by various scientific models in a generalized philosophical landscape. Hence, our philosophical - or theoretical - inquiry focuses sharply on the concept of models; and our empirical - or laboratory - evidence is sought in the model-building activities of scientists who have tried to confront the epistemological problems arising in the thermophysical sciences. Primarily for researchers and students in physics, philosophy of science, and mathematics, our book aims at informing the readers - with all the in­ dispensable technical details made readily available - about the nature of the foundational problems, how these problems are approached with the help of various mathematical models, and what the philosophical implications of such models and approaches involve. Some familiarity with elementary ther­ mophysics and/or with introductory-level philosophy of science may help, but neither is a prerequisite. The logical and mathematical background re­ quired for the book are introduced in the Appendices. Upon using the Subject Index, the readers may easily locate the concepts and theorems needed for understanding various parts of the book. The Citation Index lists the authors of the contributions we discuss in detail.

This book addresses several of the foundational problems in thermophysics, i. e. thermodynamics and statistical mechanics. It is an interdisciplinary work in that it examines the philosophical underpinning of scientific models and theories; it also refines the analysis of the problems at hand and delineates the place occupied by various scientific models in a generalized philosophical landscape. Hence, our philosophical - or theoretical - inquiry focuses sharply on the concept of models; and our empirical - or laboratory - evidence is sought in the model-building activities of scientists who have tried to confront the epistemological problems arising in the thermophysical sciences. Primarily for researchers and students in physics, philosophy of science, and mathematics, our book aims at informing the readers - with all the in­ dispensable technical details made readily available - about the nature of the foundational problems, how these problems are approached with the help of various mathematical models, and what the philosophical implications of such models and approaches involve. Some familiarity with elementary ther­ mophysics and/or with introductory-level philosophy of science may help, but neither is a prerequisite. The logical and mathematical background re­ quired for the book are introduced in the Appendices. Upon using the Subject Index, the readers may easily locate the concepts and theorems needed for understanding various parts of the book. The Citation Index lists the authors of the contributions we discuss in detail.

The book contains in-depth discussions in a rigorous manner of a host of interconnected issues and problems concerning the foundations of science. Some issues concern the substance of scientific subjects, such as the nature of spacetime and the problems in quantum mechanics, while other issues concern the methodology of science, such as the nature of theorization, idealization, as well as modeling. These discussions aim at clarifying the issues and problems, reviewing the proposed views and solutions, mapping out their logical spaces, and arguing for preferred views or solutions.