Introduction to Linear, Time-Invariant, Dynamic Systems for Students of Engineering

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Tác giả: William Hallauer

Ngôn ngữ: eng

Ký hiệu phân loại:

Thông tin xuất bản: [Place of publication not identified] : A.T. Still University, 2016

Mô tả vật lý: 1 online resource

Bộ sưu tập: Tài liệu truy cập mở

ID: 192089

 This is a complete college textbook, including a detailed Table of Contents, seventeen
- Chapter s (each with a set of relevant homework problems), a list of References, two Appendices, and a detailed Index. The book is intended to enable students to: Solve first-, second-, and higher-order, linear, time-invariant (LTI) or­dinary differential equations (ODEs) with initial conditions and excitation, using both time-domain and Laplace-transform methods
  Solve for the frequency response of an LTI system to periodic sinusoi­dal excitation and plot this response in standard form
  Explain the role of the time constant in the response of a first-order LTI system, and the roles of natural frequency, damping ratio, and resonance in the response of a second-order LTI system
  Derive and analyze mathematical models (ODEs) of low-order me­chanical systems, both translational and rotational, that are com­posed of inertial elements, spring elements, and damping devices
  Derive and analyze mathematical models (ODEs) of low-order electri­cal circuits composed of resistors, capacitors, inductors, and op­erational amplifiers
  Derive (from ODEs) and manipulate Laplace transfer functions and block diagrams representing output-to-input relationships of discrete ele­ments and of systems
  Define and evaluate stability for an LTI system
  Explain proportional, integral, and derivative types of feedback control for single-input, single-output (SISO), LTI systems
  Sketch the locus of characteristic values, as a control parameter varies, for a feedback-controlled SISO, LTI system
  Use MATLAB as a tool to study the time and frequency responses of LTI systems. The book's gen­eral organization is:
- Chapter s 1-10 deal primarily with the ODEs and behaviors of first-order and second-order dynamic systems

- Chapter s 11 and 12 discuss the ODEs and behaviors of mechanical systems having two degrees of freedom, i.e., fourth-order systems

- Chapter s 13 and 14 introduce classical feedback control

- Chapter 15 presents the basic features of proportional, in­tegral, and derivative types of classical control

- Chapter s 16 and 17 discuss methods for analyzing the stability of classical control systems. The general minimum prerequisite for understanding this book is the intellectual matur­ity of a junior-level (third-year) college student in an accredited four-year engineering curriculum. A mathematical second-order system is represented in this book primarily by a single second-order ODE, not in the state-space form by a pair of coupled first-order ODEs. Similarly, a two-degrees-of-freedom (fourth-order) system is represented by two coupled second-order ODEs, not in the state-space form by four coupled first-order ODEs. The book does not use bond graph modeling, the general and powerful, but complicated, modern tool for analysis of complex, multidisciplinary dynamic systems. The homework problems at the ends of chapters are very important to the learning objectives, so the author attempted to compose problems of practical interest and to make the problem statements as clear, correct, and unambiguous as possible. A major focus of the book is computer calculation of system characteristics and responses and graphical display of results, with use of basic (not advanced) MATLAB commands and programs. The book includes many examples and homework problems relevant to aerospace engineering, among which are rolling dynamics of flight vehicles, spacecraft actuators, aerospace motion sensors, and aeroelasticity. There are also several examples and homework problems illustrating and validating theory by using measured data to identify first- and second-order system dynamic characteristics based on mathematical models (e.g., time constants and natural frequencies), and system basic properties (e.g., mass, stiffness, and damping). Applications of real and simulated experimental data appear in many homework problems. The book contains somewhat more material than can be covered during a single standard college semester, so an instructor who wishes to use this as a one-semester course textbook should not attempt to cover the entire book, but instead should cover only those parts that are most relevant to the course objectives.
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