大学期末考试自动控制原理题集( 附带答案)概要 - 百度文库

15.һջϵͳĿݺΪG(s)?4(s?3)ϵͳΪ C

s(2s?3)(s?4)A.0ϵͳŴϵKΪ2 B.IϵͳŴϵKΪ2 C.IϵͳŴϵKΪ1 D.0ϵͳŴϵKΪ1

?֮Ĺϵͨ16.дͺУУǰĴԽƵ?cУĴԽƵ?cǣ C

? B.?c>?c? C.?c

A.һλǰУװ B.ӰϵͳƵԵĸƵ C.ʹϵͳȶܵõ D.ʹϵͳ̬ȵõ 18.ͺУװõͺλ A

A.-45 B.45 C.-90 D.90 19.ʵϷķǺΪ C

A.?45? B.?60? C.?90? D.?120?

20.ڵѹλ涯ϵͳǰͨм루 B УʹϵͳΪIIϵͳֵشľ̬

A.΢ B. C.΢ D.΢ֻ

41.һϵͳͼʾ󣺵?=0.7ʱa=? 41.:

G(s)?9 ?n?3 2֣ 2s?(2?9a)s?9??0.7ʱa?0.24 R ( s) ? ?

? ? a

42.ͼʾϵͳѧģͣԴݺʽʾ

k 42.:

9 s?21sC(s) D ??(t)?Dy0?(t)?ky0(t)?Fi(t)my0(ms2?Ds?k)Y0(s)?Fi(s)G(s)?

m 2.5֣

Fi (t) Y0(s)1? Fi(s)ms2?Ds?k13

43.ijλϵͳĴݺΪG(s)?y0 (t) 2000

s(s?2)(s?20)(1)ϵͳƵBodeͼ (2)λԣ 43.:

1)ϵͳƵBodeͼΪ 5֣

L(?) -20

34 28 -40

? 20

10 1 2

-60 2)λԣ: 5֣

?c?10s?1

??180??(?90??arctan0.5?10?arctan0.05?10)??15.26?

Զԭ6

1 .ϵͳѸȷ룬ʹܷϸҪ󣬳Ϊ D A.ϵͳʶ B.ϵͳ C. D.ſ 2 .ϵͳѧģָ Cѧʽ

A.ź B.ź C.ϵͳĶ̬ D.ϵͳ 3 .ҪڲźŵԪΪ B

A.ȽԪ B.Ԫ C.Ԫ D.ŴԪ 4 .ijͻڵĴݺG?s??1ûǣC 5s?1A. B.ֻ C.Ի D.΢ֻ

?0?t??6x?0?t??2x0?t??2xi?t?ϵͳĴݺǣ A 5 .֪ϵͳ΢ַΪ3?xA.

2121 B. C. D. 22223s?6s?23s?6s?22s?6s?32s?6s?314

6 .ʵ鷨ȡϵͳķƵʱһͨıźŵģ B źŵķֵ

A.λ B.Ƶ C.ȶԣ D.ʱ䳣 7 .һϵͳĴݺG?s??2Ϊ5%ʱΪC s?1A.1 B.2 C.3 D.4

8 .ϵͳĵʱ̣˵ A

A.ϵͳӦ B.ϵͳӦ C.ϵͳȶԲ D.ϵͳľȲ 9 .˵ȷǣ C

A.ʱӦֻܷϵͳ˲̬Ӧ B.Ƶֻܷϵͳ̬Ӧ

C.ʱӦƵԶܽʾϵͳĶ̬ D.Ƶû

10.񵴻˿˹ͼύƵΪ B

A.λƵ B.Ƶ C.гƵ D.ֹƵ 11.IIϵͳƵԵĵƵνбΪB

A.C60dB/dec B.C40dB/dec C.C20dB/dec D.0dB/dec 12.ijλϵͳĿݺΪG?s??kk= B ʱջϵͳ2s?1ȶ

A.0.5 B.1 C.1.5 D.2

13.ϵͳʽиڸƽ벿ϵͳȶģ C A. B.Ҫ C.ֱҪ D.϶ 14.ijһϵͳٶΪ㣬ϵͳĿݺǣ D A.

s?dKKK B. C. D.2

s(s?a)(s?b)s(s?a)s(s?a)Ts?115.ΪλбϵͳΪλʱIϵͳ̬ess= B

A.0.1/k B.1/k C.0 D.? 16.֪ijУװõĴݺΪGc(s)?s?1һ֣ A

0.1s?1A.λǰУ B.λͺУ C.λͺ󡪳ǰУ D.У

17.õı΢ֿƹɵһֱʾǣ D A.PDI B.PDI C.IPD D.PID 18.صǣ A

Aܽ B.ʵܽ C.Զ D.ʵԶ 19.ϵͳĿݺΪ

Kʵϵĸ켣Ϊ B

s(s?1)(s?2)A.-2-1ͣ0ޣ B.-ޣ-2ͣ-10 C.01ͣ2ޣ D.-ޣ0ͣ12

15

20.ȷ켣ĸһ͹ˣ D

A. B. C.ֵ D.ֵ+

1?as43.֪ijλϵͳĿݺΪG(s)=2ο˹ߣбϵ

sͳȶԣ˹о֤ȷԡ3.:

1?a?j(1)G(j)=ϵͳΪϵͳ

(j?)2 =0+ʱGjأ=180? (1) a?0,????ʱGjأ=90? (1) a?0,????ʱGjأ=270? (1) µο˹ͼʾ

(3)

ͼжa>0ʱϵͳȶa<0ʱϵͳȶ (2) 2)ϵͳıջʽΪDs=s2+as+1D(s)Ϊףa>0ΪDsȶijҪоݽһ

K44.ϵͳĿݺΪG(s)= ԻƸϵͳĸ켣ʹϵͳ

s(s?2)(s?4)ȶKֵΧ 44.:

(1)켣ֱ֧Ϊs1=0,s2=-2,s3=-4յΪԶ (1) (2)ʵϵ0-2-4-޼߶Ǹ켣 (1) (3)ߵǷֱΪ60㣬180㡣 (1) ʵĽΪa= (4):ݹʽ

?2?4 =-2 (1) 3dK=0, :s1=-0.85s2=-3.15Ϊλ0-2֮ɼdss2ʵʵķ㣬s1=-0.85ʵʷ㡣 (1)

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