四川大學(xué)計(jì)算機(jī)網(wǎng)絡(luò)考試2009年-A.doc

四川大學(xué)期 考試試題（閉卷） A卷（2009 2010 學(xué)年第 1 學(xué)期）課程號(hào)：30336020 課序號(hào)： 0 課程名稱：專業(yè)英語 任課教師：楊曉梅 成績：適用專業(yè)年級(jí)： 06級(jí)自動(dòng)化本科 學(xué)生人數(shù)：118人 印題份數(shù)：125 學(xué)號(hào)： 姓名：考 試 須 知四川大學(xué)學(xué)生參加由學(xué)校組織或由學(xué)校承辦的各級(jí)各類考試，必須嚴(yán)格執(zhí)行四川大學(xué)考試工作管理辦法和四川大學(xué)考場規(guī)則。有考試違紀(jì)作弊行為的，一律按照四川大學(xué)學(xué)生考試違紀(jì)作弊處罰條例進(jìn)行處理。四川大學(xué)各級(jí)各類考試的監(jiān)考人員，必須嚴(yán)格執(zhí)行四川大學(xué)考試工作管理辦法、四川大學(xué)考場規(guī)則和四川大學(xué)監(jiān)考人員職責(zé)。有違反學(xué)校有關(guān)規(guī)定的，嚴(yán)格按照四川大學(xué)教學(xué)事故認(rèn)定及處理辦法進(jìn)行處理。注意：所有答案寫在答題紙上一、1. For parallel connection, the overall transfer function is simply the _of individual transfer functions.A. sum B. difference C. product D. ratio2. The Laplace transformation ratio of the output to the input for a system is called_A. behavior of the system B. transmitting functionC. transform function D. transfer function3. A secondorder system with _ larger than one is referred to as _ systemA . damping ratio B. damped frequency C. underdamping D. overdamping4. As damping ratio is . increased，the system overshoot _A. increases B. decreases C. is constant D. decays5. The steady state performance of a system is best defined of _A. error parameter B. error constant C. Steady state error D. Transient error6. If the system does not have any_, the system can be called _systemA. output B. feedback c. an open loop D. input7. The equation is called _A. differential equation B. difference equationC. derivative equation D. integral equation8. A _ is a constant velocity and is represented as r(t)=At (t=0)A. impulse input B. step input C. ramp input D. parabolic input9. In the second-order system for the damping ration s1, the system is called _ system; for s=1, the system is of _systemA. underdamping B. critical damping C. overdamping D. No damping10. The _ is used to deliver an output signal which is larger than the input signalA. subtractor B. summer C. amplifier D. divider 11. The poles are_, indicating a _processA. negative B. positive C. stable D. unstable 12. For a overdamping second-order system, its characteristic equation has two _ and _ polesA. equal B. unequal C. complex D. real13. the _ is the path from the input node to the output node without passing through any node twice.A. forward path B. feedback path C. open loop D. double-loop14. When complex poles are appeared in pair with the same real parts and the minus imaginary they are called the _ complex poles.A. real B. conjugate C. repeated D. distinct15. the poles closer to the imaginary axis are referred to as_ polesA. important B. real C. imaginary D. dominantConsidering a _（閉環(huán)系統(tǒng)）,the output transfer function is The _(暫態(tài)響應(yīng)) of the system depends on the _(根) of the _(特征方程)。The output in _(時(shí)域) is obtained by the _(拉式反變換) of the above equation. For _(單實(shí)根) the response is an _(衰減指數(shù))， for complex poles the response is _(振蕩的)。 The same transfer function can also be formulated into _(狀態(tài)空間模型)。將下列中文專業(yè)術(shù)語翻譯成英文（40分）1. 經(jīng)典控制理論 2. 傳遞函數(shù) 3. 狀態(tài)空間方程 4. 微分方程 5. 拉式變換 6. 零-極點(diǎn) 7. 阻尼比 8. 暫態(tài)響應(yīng) 9. 穩(wěn)態(tài)誤差 10. 超調(diào)量 11. 參考輸入 12. 干擾輸入 13. 反饋控制 14. 一階系統(tǒng) 15. 線性動(dòng)態(tài)模型 16. 特征方程 17. 階躍響應(yīng) 18. 根軌跡 19. 功率放大器 20. 穩(wěn)定性 二、寫出下列公式的英文讀法（20分）1. 3/5: 2. 9.25： 3. 5% 4. X3 5. A+B 6. AB 7. AB 8. 9. 10. ro注：1試題字跡務(wù)必清晰，書寫工整。 本題 頁，本頁為第 頁 2 題間不留空，一般應(yīng)題卷分開 教務(wù)處試題編號(hào)： 3務(wù)必用A4紙打印 學(xué)號(hào)： 姓名三、將下列英文翻譯成中文（30分）1、Control system analysis and design can be summarized in terms of following two questions:(1) Analysis: What is the performance of given system in response to changes of inputs or disturbances?(2) Design: If the performance is unsatisfactory, how can it be improved without changing the process, actuator, and power amplifier blocks?2、Stability is always the primary concern in feedback control design. But to be useful a system must also possess adequate relative stability; that is, the overshoot of step response must be acceptably small, and this response must not be unduly oscillatory during the transient period.3、In the input-output relation C(s)=G(s)R(s), each of C,G ,and R is in general a ratio of polynomials in s. Definitions:Zeros of C,G and R are the roots of their numerator polynomials.Poles of C,G and R are the roots of their denominator polynomials.System zeros and system poles are those of the system transfer function G(s).System characteristics polynomial is the name often used for the denominator polynomial of G(S).System characteristic equation identifies the result if the system characteristics polynomial is equated to zero. Eviden