Institution: China Geo University (Beijing)

Enrollment category: full-time graduate students

College: School of Information Engineering

Category Code and Name: [08] Engineering

First-class discipline code and name: control science and engineering.

First, the nature of the examination.

The main contents of this course examination are mathematical model of control system, time domain analysis method of control system, root locus method, frequency response method, control system correction, discrete control system and nonlinear control system. Pay attention to whether the candidates have mastered the most basic theoretical knowledge and methods of automatic control theory. Its evaluation standard is to make outstanding college graduates reach the level of passing or above.

Second, the examination form and examination paper structure

1. Answer method: closed-book written test.

2. Answer time: 180 minutes.

3. Question proportion: full mark 150, the question type is the basic concept, choose to fill in the blanks, calculate, analyze and prove.

Third, the test points

Mathematical model of 1. control system

The basic principle and concept of automatic control system, the classification of automatic control system, the method of establishing differential equation of control system, transfer function, system block diagram and signal flow chart.

2. Time domain analysis of control system.

Performance index of linear system time response, first-order system time domain analysis, second-order system time domain analysis, high-order system time domain analysis, linear system stability analysis, linear system steady-state error calculation.

3. Root locus method

The basic concept of root locus method, the basic rules of drawing root locus, the drawing of parameter root locus, the root locus of non-minimum phase system, and the analysis of control system by root locus method.

4. Frequency response method

Frequency characteristics, logarithmic coordinate diagram, polar coordinate diagram, Nyquist stability criterion, relative stability analysis, mathematical model of linear time-invariant system identification by frequency method.

5. Calibration of control system

Commonly used correction devices and their characteristics, the control system is designed and corrected by using lead correction method, lag correction method and lag-lead correction method, and the PID controller and its parameters are adjusted.

6. Discrete control system

Z-transform theory, signal sampling and reproduction, pulse transfer function, difference equation, performance analysis and digital correction of discrete control system.

7. Nonlinear control system

Characteristics, singularity and limit cycle of nonlinear control system, description function analysis of nonlinear control system, phase plane analysis of nonlinear system.

Fourth, reference materials.

Hu Shousong, Principles of Automatic Control (6th Edition), Beijing: Science Press, 20 13.

Fourth, the scores over the years

19: Politics: 39 English: 39 Mathematics: 59 Specialized courses: 59 Total score of 270.

20 years: politics: 37 English: 37 math: 56 specialized courses: 56 with a total score of 280

2 1 year: politics: 37 English: 37 mathematics: 56 specialized courses: 56 with a total score of 280.

Verb (abbreviation of verb) experience sharing

Politics:

At that time, I bought Exquisite, 1000 Questions (up and down), Xiao Si and Hachiba, as well as Situation and Policy, Summary of Knowledge Points and so on. Because I am worried about the heavy tasks in the later period, I began to study political postgraduate entrance examination from the summer vacation. Before 10, I allocated more time for politics. After 10, I reduced the time for political study.

(1) Exquisite: I spent a summer vacation reading it as a whole, and completed the task of "1000". Spend 1.5 hours every day watching some of the contents of Exquisite, and then complete the corresponding exercises and revisions of 1000.

Tips: When learning "Intensive Lecture", you can use video according to your personal situation. For example, Xu Tao's intensive class video, which is widely circulated on the Internet, has made good achievements for my classmates.

(2) "1000 question": I brushed it three times. The first two times were # # from beginning to end, and the third time was just the wrong question of the second time.

The first time, do it all+circle the uncertain questions. After you finish, circle the wrong and uncertain questions in the answer book and outline the unfamiliar knowledge points for your memory. It takes 7/8 months to complete, because it is in line with "fine talk and fine work";

I bought a new "1000 question" for the second time, and did it again+circled the uncertain questions. For the answers, I marked the wrong questions and uncertain questions with new marks in the original answer book, and analyzed the reasons. It takes about 45 minutes a day, and it takes about one month in September;

The third time, review the wrong questions brushed in the second time and record the questions and knowledge points that you don't know yet. Because 10, the task of reciting specialized courses was aggravated, which lasted only about 20-30 minutes every day until I got Grade 8.

Tips: "1000" Don't try to do it again. Wipe it and do it again. Really, I don't think I want to wipe it at all. Anyway, that's what I do. I have this idea that I will be tied behind my back the first time I do it, but it's not good, so I said I would buy a new brush and do it again. It smells really good.

(3) Xiao Si+Hachi yyds is a must! ! !

① objective questions

I brushed these two multiple-choice questions twice, the first time I brushed them all, and the second time I brushed them all wrong, so I'm not sure. Before the exam, I will read all the current political issues of the two books (I personally think it is very necessary and beneficial to thoroughly understand the current politics of Xiao Si Xiao Ba).

Tips: To brush Xiao four shaw Eight, you must pinch time+calculate integral and do full simulation. What's more, when you start to brush the questions, you may only get twenty or thirty points, but don't be discouraged. Grasp the last brush several times, and remember the knowledge points on the sprint paper several times. Many test sites are linked together. I believe I will make a qualitative breakthrough in the examination room!

2 subjective questions.

I didn't read the big questions of Grade 8, but recited the big questions of Xiao Si. Look at the materials and topics first, then at the answers, sketch the key words, learn how Grandpa Xiao answers with the materials, then write a few key words under the topic, recite the answers several times, then look at the topics and key words and remember them many times, until you go to the examination room.

Tip: I think when reciting the four major questions, don't just recite the answers without looking at the information. It's best to analyze the answers in combination with the materials for the first time, which will help you extract the main points from the materials and get more scores when you encounter questions that you haven't recited in the examination room. Of course, during the exam, you must write more, write out all the topics you can think of, and mark them with serial numbers if you can divide them, so that the teacher can see the main points clearly and not miss them.

(4) Summary of knowledge points

I bought it, but it didn't help much to read a few pages, because it would be more convenient to use the supporting books after I followed my sister's "Back for 30 Days", so this one was idle.

(5) Situation and policy

I bought this book and brushed all the topics, but I was a little too lazy to remember it because of too much content, so I didn't read it again in the later period, only looked at the current political issues of Xiao four shaw.

2. Leg sister

(1) "One question a day"

I didn't know about it at first, but I came across this treasure column in September. Then I spend about 15 minutes every day to brush the questions and take a look at the relevant knowledge points, so I will go through them directly at a glance, and I will charge more if I am not familiar with them. I think this is very beneficial. The topics are all classic topics, and then the part that Sister Leg said has a proper extension, which is helpful for us to understand and think.

(2) 30 days with a back is highly recommended! ! !

This is very useful when used with a shocking recitation manual. Among them, Sister Leg will take you to memorize all the key contents of the exam, which is very helpful for the exam, such as the "inevitability and contingency" of this year's big exam, and so on. I only remember this knowledge point by listening to Sister Leg.

(3) "Sprint Life-saving Course Handout"

I went through this from beginning to end, and then mainly recited the previous "important meeting" part. This handout sorts out the latest key current events and so on, which is quite helpful for the exam (I personally think it will be more efficient to read this than to read the situation and policies, and of course it will be better to read both if there is enough time).

English:

English learning is a long process. I have a good foundation in English. After passing CET-4 and CET-6, I got a score of 5 1 1, so I can take the postgraduate entrance examination for English more easily.

Words: "Are you still reciting words"+"Little Red Book";

Long and difficult sentence: Isn't this Liu Xiaoyan's long and difficult sentence?

Reading: Tang Chi's The Logic of Reading+Tang Chi's True Reading Class.

New question type: Liu Qi, find her class from the Internet.

Tang Jing (a patient and earnest teacher) just attends class.

Cloze: Yi Xiren

Composition: Liu Xiaoyan's class+Wang Jiangtao's "High Score Writing in Postgraduate English"

Zhenti: Zhang Jian Yellow Book (04-2 1)

(1) English words:

Reciting words is just two words-repetition.

When I first started memorizing words, I bought a big research book "Are you still memorizing words?" Compared with the video, I read it twice as fast. Are all core words. There are a lot of chicken soup in the video, which is also very fun. I still remember some difficult words. But I don't recommend watching the word class. This is a bit of a waste of time. If you have enough time, baby, you can look at the related parts of speech. I quite like the chicken soup taught by Teacher Goose, which can inspire me.

The recitation of words should be carried out from the first day of preparation to the last day before the exam. Be sure to stick to it, don't give up halfway, set the amount of reciting every day, and you can switch to other learning content after reciting it. Also, when reciting, you must use your mouth, pen and brain, or you will forget it after reciting.

(2) Long and difficult sentences+reading

Let readers win the world. The key to mastering long and difficult sentences is to distinguish the logical structure of sentences and understand the subject, predicate, object, adverbial attribute and so on. Reading is full of long and difficult sentences, and these structures are also very complicated, so when preparing for the exam, you must start learning from long and difficult sentences.

At that time, I bought a book, Isn't it just a long and difficult sentence? I learned it from Teacher Dayan's class. This work was completed in mid-April. Teachers start with very simple sentence elements, which is very suitable for students with weak foundation. My other classmates also recommend Mr. Song Yixuan. You can look at them all and choose a teacher that suits you. Before July, I copied down the sentences in my notebook with one sentence a day, tried to separate the long and difficult sentences and translated them myself.

After understanding the long and difficult sentences, you can start reading. I used The Logic of Reading, which I learned from Tang Chi's class and benefited a lot. In the teaching process, teachers will intersperse various reading methods. These methods are very practical. What the teacher says is true questions. We can learn to read again, master the vocabulary in the real questions, and remember to review them often.

After class, you can try to do some early real questions (/kloc-real questions after 0/0 can be done after June). It is normal to make many mistakes at first. Not the correct rate, but whether the reading methods you have learned are used in this article, whether you have grasped the meaning of the article, whether you have memorized all the words in the article, and so on. After reading an article at that time, I sorted out the key words according to the translation of the answer, and recorded the meaning of each paragraph beside it according to my own understanding. If you make a lot of mistakes or really can't, watch the relevant real lesson. Try to write a real question every day to keep me moving. I brushed the real question about three times. The real question is the most precious resource, don't waste it!

Math:

Recommended teaching AIDS: Li Yongle's review book for postgraduate mathematics, Zhang Yu's thirty lectures on basics, and the designated teaching material of probability theory of generating high numbers.

Recommended exercise books: Li Yongle 660, lin li 880, Tang Jiafeng 1800, Zhang Yu 300.

Personally, the most important thing at this stage is to lay the foundation. As for which teacher I want to talk to, I don't want to talk about drainage. After all, everyone's situation is different. For example, I have a good foundation in mathematics, so I'm basically eating textbooks and doing exercises in Li Yongle's review book at this stage, and I haven't listened to the class very much. If you have any questions, I made a brief introduction to the basic article of Tang Jiafeng 1800 (unfinished).

In fact, this stage is to review the basic knowledge and awaken dusty memories. If you haven't studied advanced mathematics or have a poor foundation, I suggest that you go to the basic class of Tang Jiafeng or Wu Zhongxiang (it seems that Mr. Wu only teaches advanced mathematics), and the online generations are Li Yongle and Wang Shian. Although we have learned the basic knowledge at this stage, it is also necessary to do the problem, because the most important thing for postgraduate mathematics is not to attend classes, but to do the problem.

Let me give you a brief introduction of the exercise book. 660 words are all objective questions. I heard it was quite difficult (never done). You can try if you have a good foundation.

Li Lin's 880 words are the only exercise book I have finished. I can only do the basic articles in the early stage. The basic articles are close to the difficulty of postgraduate entrance examination, and the comprehensive articles are completely high. It is recommended to do it in the intensive stage.

Zhang Yu's 300 questions are completely used in the basic stage, so it is recommended to lay the foundation. The difficulty of the question is relatively moderate (I only read it, but didn't do it), while Tang Jiafeng's words only need to be the basic part of the basic stage.

Because the basic stage is basically to eat textbooks by yourself, it may not be of great reference value, so you can weigh it yourself. By the way, if there is enough time, I suggest going back to the textbook. You can learn the description of basic concepts and the proof of theorems in textbooks, which is of great help to the later strengthening stage and problem solving. If there is not much time, it is recommended to give priority to teaching AIDS. After all, it is an exam.

3. Intensive phase (July-September)

Recommended teaching AIDS: Zhang Yu 18 lecture, linear algebra lecture, probability theory lecture, Zhang Yu probability theory lecture 9, Wu Zhongxiang advanced mathematics lecture.

Exercise books: 660, lin li 880, Zhang Yu 1000, Tang Jiafeng 1800 (don't brush them all, just one or two).

In July of the summer vacation, because there was no class, I basically stayed at school to review wholeheartedly during this period. The strengthening phase began in July. I think this stage is more important. At this stage, it is necessary to combine curriculum and problem solving, constantly lay a solid foundation, improve problem solving ability, and prepare for the real problem solving stage. I'll talk about it in detail at this stage. If the partner starts in July and has a good foundation, it is recommended to start the strengthening stage directly. In my opinion, it is generally not too late for the enhancement phase to end before 10, but I suggest that it can end in mid-September. If the foundation is not good, don't worry from July. You can follow the intensive class slowly, read more textbooks when you encounter concepts that you don't understand clearly, and don't rush to make progress. Be sure to thoroughly understand the key knowledge points. The most important thing at this stage is to know what you don't know in the basic stage, lay a solid foundation, and improve the sense of the problem and the speed of doing it by constantly brushing the questions.

Professional courses:

In fact, the things tested in professional courses are still very basic. Personally, it is not a problem to read the most basic books well and get high marks. I arranged my time reasonably during the exam. At first, I just misread the time, which led to the hasty writing of big questions and the fabrication of comments, so I didn't get the ideal copy. I hope those who want to get high marks will take a warning. I won't say much about this. But let's not relax. After all, a good friend failed his major. If a major can sign up for a class, it will often have a multiplier effect. I started to watch professional courses in August, and I was completely at a loss. And there is always an inexplicable sense of resistance to professional courses, and I don't want to watch them. The time spent on professional courses in a day is definitely not more than one hour. What's the real problem?

I haven't read any essential books such as reference books. Finally, I recited the textbooks and knowledge points distributed by the remedial class. I'm quite satisfied with this major.

Sixth, write it at the end.

In the process of postgraduate entrance examination, all we need is unlimited efforts, efforts to maintain a comfortable mood, sunshine efforts and healthy efforts, and the rest is left to luck. I believe that when you make this decision, you have already defeated many people, and the only thing you have to defeat is yourself.

After grasping the study time and efficiency, I believe I can do it. Postgraduate entrance examination is not only a test of knowledge, but also a test of mentality.