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- 2022年5月24日 (二) 00:43 SWARM （历史 | 编辑） [55,881字节] Zhang3（讨论 | 贡献） （创建页面，内容为“SWARM First published in The Magazine of Fantasy & Science Fiction, April 1982. "I will miss your conversation during the rest of the voyage," the alien said. Captain-Doctor Simon Afriel folded his jeweled hands over his gold-embroidered waistcoat. "I regret it also, ensign," he said in the alien's own hissing language. "Our talks together have been very useful to me, I would have paid to learn so much, but you gave it freely." "But that was only informatio…”）
- 2022年4月30日 (六) 12:31 Control Systems/Realizations （历史 | 编辑） [4,377字节] Zhang3（讨论 | 贡献） （创建页面，内容为“{{Control Systems/Page|MIMO Systems|Gain}} == Realization == '''Realization''' is the process of taking a mathematical model of a system (either in the Laplace domain or the State-Space domain), and creating a physical system. Some systems are not realizable. An important point to keep in mind is that the Laplace domain representation, and the state-space representations are equivalent, and both representations describe the same physical systems. We want, th…”）
- 2022年4月30日 (六) 12:30 Control Systems/MIMO Systems （历史 | 编辑） [9,008字节] Zhang3（讨论 | 贡献） （创建页面，内容为“{{Control Systems/Page|Standard Forms|Realizations}} == Multi-Input, Multi-Output == Systems with more than one input and/or more than one output are known as '''Multi-Input Multi-Output''' systems, or they are frequently known by the abbreviation '''MIMO'''. This is in contrast to systems that have only a single input and a single output (SISO), like we have been discussing previously. == State-Space Representation == {{SideBox|See the Control Systems/Int…”）
- 2022年4月30日 (六) 12:29 Control Systems/Standard Forms （历史 | 编辑） [7,813字节] Zhang3（讨论 | 贡献） （创建页面，内容为“{{Control Systems/Page|Eigenvalues and Eigenvectors|MIMO Systems}} == Companion Form == A '''companion form''' contains the coefficients of a corresponding characteristic polynomial along one of its far rows or columns. For example, one companion form matrix is: :<math>\begin{bmatrix} 0 & 0 & 0 & \cdots & 0 & -a_0 \\ 1 & 0 & 0 & \cdots & 0 & -a_1 \\ 0 & 1 & 0 & \cdots & 0 & -a_2 \\ 0 & 0 &…”）
- 2022年4月30日 (六) 12:29 Control Systems/Eigenvalues and Eigenvectors （历史 | 编辑） [15,636字节] Zhang3（讨论 | 贡献） （创建页面，内容为“{{Control Systems Page|Time Variant System Solutions|Standard Forms}} == Eigenvalues and Eigenvectors == {{SideBox|Eigenvalues and Eigenvectors cannot be calculated from time-variant matrices. If the system is time-variant, the methods described in this chapter will not produce valid results.}} The eigenvalues and eigenvectors of the system matrix play a key role in determining the response of the system. It is important to note that only square matrices hav…”）
- 2022年4月30日 (六) 12:28 Control Systems/Digital State Space （历史 | 编辑） [9,936字节] Zhang3（讨论 | 贡献） （创建页面，内容为“{{Control Systems/Page|Time Variant System Solutions|Eigenvalues and Eigenvectors}} == Digital Systems == Digital systems, expressed previously as difference equations or Z-Transform transfer functions, can also be used with the state-space representation. All the same techniques for dealing with analog systems can be applied to digital systems with only minor changes. == Digital Systems == For digital systems, we can write similar equations using discrete…”）
- 2022年4月30日 (六) 12:27 Control Systems/Time Variant System Solutions （历史 | 编辑） [10,333字节] Zhang3（讨论 | 贡献） （创建页面，内容为“{{Control Systems/Page|Linear System Solutions|Digital State Space}} == General Time Variant Solution == The state-space equations can be solved for time-variant systems, but the solution is significantly more complicated than the time-invariant case. Our time-variant state equation is given as follows: :<math>x'(t) = A(t)x(t) + B(t)u(t)</math> We can say that the general solution to time-variant state-equation is defined as: {{eqn|Time-Variant General Sol…”）
- 2022年4月30日 (六) 12:27 Control Systems/Linear System Solutions （历史 | 编辑） [13,290字节] Zhang3（讨论 | 贡献） （创建页面，内容为“{{Control Systems/Page|State-Space Equations|Time Variant System Solutions}} == State Equation Solutions == {{SideBox|The solutions in this chapter are heavily rooted in prior knowledge of Ordinary Differential Equations. Readers should have a prior knowledge of that subject before reading this chapter.}} The state equation is a first-order linear differential equation, or (more precisely) a system of linear differential equations. Because this is a firs…”）
- 2022年4月30日 (六) 12:27 Control Systems/State-Space Equations （历史 | 编辑） [24,604字节] Zhang3（讨论 | 贡献） （创建页面，内容为“{{Control Systems/Page|Poles and Zeros|Linear System Solutions}} == Time-Domain Approach == The "Classical" method of controls (what we have been studying so far) has been based mostly in the transform domain. When we want to control the system in general, we represent it using the Laplace transform (Z-Transform for digital systems) and when we want to examine the frequency characteristics of a system we use the Fourier Transform. The question arises, why do…”）
- 2022年4月30日 (六) 12:26 Control Systems/Poles and Zeros （历史 | 编辑） [7,008字节] Zhang3（讨论 | 贡献） （创建页面，内容为“{{Control Systems/Page|System Delays|State-Space Equations}} == Poles and Zeros == '''Poles''' and '''Zeros''' of a transfer function are the frequencies for which the value of the denominator and numerator of transfer function becomes zero respectively. The values of the poles and the zeros of a system determine whether the system is stable, and how well the system performs. Control systems, in the most simple sense, can be designed simply by assigning spec…”）
- 2022年4月30日 (六) 12:25 Control Systems/Transfer Functions （历史 | 编辑） [8,601字节] Zhang3（讨论 | 贡献） （创建页面，内容为“{{Control Systems/Page|Transforms|Sampled Data Systems}} == Transfer Functions == {{MATLAB CMD|tf|Control Systems/MATLAB}} A '''Transfer Function''' is the ratio of the output of a system to the input of a system, in the Laplace domain considering its initial conditions and equilibrium point to be zero. This assumption is relaxed for systems observing transience. If we have an input function of ''X(s)'', and an output function ''Y(s)'', we define the transfe…”）
- 2022年4月30日 (六) 12:25 Control Systems/Transforms （历史 | 编辑） [16,494字节] Zhang3（讨论 | 贡献） （创建页面，内容为“{{Control Systems/Page|System Modeling|Transfer Functions}} == Transforms == There are a number of transforms that we will be discussing throughout this book, and the reader is assumed to have at least a small prior knowledge of them. It is not the intention of this book to teach the topic of transforms to an audience that has had no previous exposure to them. However, we will include a brief refresher here to refamiliarize people who maybe cannot remember th…”）
- 2022年4月30日 (六) 12:23 Control Systems/System Modeling （历史 | 编辑） [7,228字节] Zhang3（讨论 | 贡献） （创建页面，内容为“{{Control Systems/Page|System Metrics|Transforms}} == The Control Process == It is the job of a control engineer to analyze existing systems, and to design new systems to meet specific needs. Sometimes new systems need to be designed, but more frequently a controller unit needs to be designed to improve the performance of existing systems. When designing a system, or implementing a controller to augment an existing system, we need to follow some basic steps:…”）
- 2022年4月30日 (六) 12:23 Control Systems/System Metrics （历史 | 编辑） [12,797字节] Zhang3（讨论 | 贡献） （创建页面，内容为“{{Control Systems/Page|Digital and Analog|System Modeling}} == System Metrics == When a system is being designed and analyzed, it doesn't make any sense to test the system with all manner of strange input functions, or to measure all sorts of arbitrary performance metrics. Instead, it is in everybody's best interest to test the system with a set of standard, simple reference functions. Once the system is tested with the reference functions, there are a number…”）
- 2022年4月30日 (六) 12:22 Control Systems/Digital and Analog （历史 | 编辑） [8,564字节] Zhang3（讨论 | 贡献） （创建页面，内容为“{{Control Systems/Page|System Identification|System Metrics}} == Digital and Analog == There is a significant distinction between an '''analog system''' and a '''digital system''', in the same way that there is a significant difference between analog and digital data. This book is going to consider both analog and digital topics, so it is worth taking some time to discuss the differences, and to display the different notations that will be used with each. ==…”）
- 2022年4月30日 (六) 12:22 Control Systems/System Identification （历史 | 编辑） [11,776字节] Zhang3（讨论 | 贡献） （创建页面，内容为“{{Control Systems/Page|Introduction|Digital and Analog}} == Systems == Systems, in one sense, are devices that take input and produce an output. A system can be thought to '''operate''' on the input to produce the output. The output is related to the input by a certain relationship known as the '''system response'''. The system response usually can be modeled with a mathematical relationship between the system input and the system output. == System Properti…”）
- 2022年4月30日 (六) 12:21 Control Systems/Introduction （历史 | 编辑） [20,592字节] Zhang3（讨论 | 贡献） （创建页面，内容为“{{Control Systems/Page||System Identification}} == This Wikibook == This book was written at '''Wikibooks''', a free online community where people write open-content textbooks. Any person with internet access is welcome to participate in the creation and improvement of this book. Because this book is continuously evolving, there are no finite "versions" or "editions" of this book. Permanent links to known good versions of the pages may be provided. == What a…”）
- 2022年4月30日 (六) 00:55 Control Systems/Preface （历史 | 编辑） [1,002字节] Zhang3（讨论 | 贡献） （创建页面，内容为“This book will discuss the topic of Control Systems, which is an interdisciplinary engineering topic. Methods considered here will consist of both "Classical" control methods, and "Modern" control methods. Also, discretely sampled systems (digital/computer systems) will be considered in parallel with the more common analog methods. This book will not focus on any single engineering discipline (electrical, mechanical, chemical, etc.), although readers should hav…”）
- 2022年4月30日 (六) 00:42 Control Systems （历史 | 编辑） [5,406字节] Zhang3（讨论 | 贡献） （创建页面，内容为“<noinclude> {{Featured book}} {{Control Systems/Page}} {| width=100% |- | valign=top width=30% | __TOC__ | valign=top | {{Goodbook/Control Systems|edit=1}} | valign=top | {{Print version}} {{PDF version|Control Systems}} {{Collection}} |} == Preface == {{Prerequisite|Signals and Systems}} {{Reading level|Professional}} {{:Control Systems/Preface}} </noinclude> {{-}} == Table of Contents == === Special Pages === {{RenderPNG}} {{Engineering Tables/Use}} {| |…”）
- 2022年4月23日 (六) 12:44 Libgcc （历史 | 编辑） [8,373字节] Zhang3（讨论 | 贡献） （创建页面，内容为“GNU Compiler Collection在代码生成过程中使用了一个名为<tt>libgcc</tt>的特殊库，其中包含共享代码，每次重复这些代码都会降低效率，还包含辅助辅助程序例程和运行时支持。 其确切内容取决于特定的目标、配置，甚至取决于命令行选项。 GCC无条件地假设它可以安全地发出对它认为合适的 <tt>libgcc</tt> 符号的调用，因此GCC编译的所有代码都必须与 <tt…”）