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申请的是英语面试，自己在大学里其实混了3年半，数学啊专业基础都很差的……只好硬着头皮上了，另外顺便问问我在学校成绩不怎么样（可以说比较差的），是不是申请International Master很困难？
目前提纲如下
1.自我介绍Personal Statement
2.自动控制理论Automatic Control Theory
3.PLC Application
4.电路原理Circuit Principles
5.电机拖动Electric Machine & Pulling
6.过程控制Process Control
7.数电和模电
8.电力电子
9.现代控制理论
10.其他（工程制图，计算机网络，单片机）
11.毕业设计Graduation Design
模电和数电还有电力电子技术还没考虑好要不要加进去……
1月14日做了自动控制理论部分的介绍
This course mainly discussed the analysis and design of linear control system. For a system given structure and parameters, analyze its stability, steady-state error and performance specifications of transient response. Stability determines whether the system can establish new balance state after disturbance. Steady-state error accounts for the steady-state accuracy after the system has established new balance state. There is also a transitional state exists from the system starting to receive external force to the establishing of new balance state, known as the transient response process, its performance, such as the quickness of temporal response, the accuracy of steady-state, or the relative stability of the system, is described by performance specifications, which are requirements that a control system must meet. Those specifications generally include maximum overshoot, rise time, peak time and settling time. So we must first derive the system’s mathematical model, generally using block diagrams, in order to obtain system’s open-loop and close-loop transfer function. Then according to the form of the established model, we can respectively adopt time domain analysis(using Routh-Hurwitz Stability Criterion), root-locus method and frequency-response method(using Nyquist Criterion and Bode diagrams) to analyze the control system.
Another aspect of this course involves designing a system. Given the control tasks and the system’s specific performance requirements, design proper control or correction system and determine its structure and parameters.
1月15日完成电路原理部分介绍
This course first introduces 3 types of load: resister, inductance, and capacitance, along with 2 types of energy source: the voltage source and the current source. It also introduces 2 important laws: Kirchhoff’s Current Law and Kirchhoff’s Voltage Law. It then discusses the analytical methods of simple resistor circuit and further presents the analytical methods of more complex linear circuit: branch-current method, loop-current method and node-voltage method. Among several circuit theorems, it lays stress on Thevenin’s theorem and Norton’s theorem, both of which are about equivalent circuits of linear two-terminal networks.
1月16日完成PLC和电机拖动部分介绍
[B]PLC：[/B]PLC, short term for Programmable Logic Controller, is a device that was invented to replace the necessary sequential relay circuits for machine control. The PLC works by looking at its inputs and depending upon their state, turning on/off its outputs. The user enters a software program that gives the desired results.
The PLC mainly consists of a CPU, memory areas, and appropriate circuits to receive input/output data. We can actually consider the PLC to be a box full of hundreds or thousands of separate relays, counters, timers and data storage locations. They don’t physically exist but rather they are simulated.
The PLC works by continually scanning a program. This scan cycle mainly consists of 3 important steps: checking input status, executing program and updating output status. After all the 3 steps the PLC goes back to step 1 and repeats the steps continuously.
[B]电拖：[/B]This course first presents the structure and basic operating principles of direct-current machines, then takes separately excited direct-current motor for instance, analyzing its starting, braking and speed regulating process. After giving a brief presentation on transformer, which transforms low-voltage energy into high-voltage or vice versa, it presents the structure and basic operating principles of three-phase induction motor and accordingly analyzes its electrical pulling process.
1月17日完成过程控制介绍
This course first discusses the detection and transmission of parameters in the process control, for instance, temperature, pressure, flow and level. Among some instruments of process control, it analyzes the switching process between soft and hard manual operation circuit of DDZ-III adjustor, as well as the selection of adjust valves in the executor. Then it introduces high performance process control systems that are in common use: cascade control system and feedforward control system. It also talks about some process control systems that meet special requirements, such as proportional control system, uniform control system, split-range control system and selective control system.
1月18日完成现代控制理论介绍
Modern control theory develops on the fundamentals of classical control theory, which is mainly applied to single-input-single-output control system. Yet in the fields such as complicated industrial system, astronautical technology, robot control and biological engineering, most systems are multiple-input-multiple-output systems. Modern control theory, with state-space theory at the core, analyzes multiple-input-multiple-output, time-variant and nonlinear systems. It mainly discusses following problems:
1.By using the describing method of state-space, derive the mathematical model of MIMO system and obtain its state equation and output equation.
2.Based on the state equation, take the linear transformation and time domain motion analysis of the system.
3.Analyze system’s controllability and observability, and based on the analysis decompose the structure of the system, in order to reveal the essential characteristics of controllability and observability.
4.Using Liapunov theory to analyze the system’s stability.
5.With state feedback and output feedback as utilities, to have the linear system integrated designed. Design state observer for completely observable system, thus providing basis for state feedback.
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狗仔卡
发表于 2006-1-13 00:08:38
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楼主
楼主，不要太紧张，每一门准备一点就可以了，准备那么多的材料不背死你啊