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?1?1?1?2???(z)?1?Ge(z)?az(1?0.6z)?az?0.6?a?z ??1?1?1?2??Ge(z)?(1?z)(1?bz)?1?(1?b)z?bzÁ½Ê½ÖеÄa£¬bΪ´ý¶¨ÏµÊý¡£½«ÉÏÁ½Ê½ÁªÁ¢£¬¿ÉÇóµÃ£ºa=0.625£¬b=0.375¡£ (²Î¿¼MATLABÃüÁ[a,b]=solve('a= (1-b)', '(0.6*a)=b');) ËùÒÔÓУº
?1?1?1?2???(z)?1?Ge(z)?0.625?z(1?0.6z)?0.625?z?0.375?z ??1?1?1?2??Ge(z)?(1?z)(1?0.375z)?1?0.625?z?0.375?z- 3-8 -
¡¶¼ÆËã»ú¿ØÖƼ¼Êõ¼°ÆäÓ¦Óá· µÚ3Õ Êý×Ö¿ØÖÆÆ÷µÄÉè¼ÆÓëʵÏÖ Ë¼¿¼ÌâÓëϰÌâ Ö¸µ¼ÐÅÏ¢
½«ÉÏÃæÁ½Ê½´úÈ룬¿ÉÇó³öÊý×Ö¿ØÖÆÆ÷µÄÂö³å´«µÝº¯Êý
¦µ(z)0.625?z?1(1?0.6z?1)1.25?(1?0.4z?1) D(z)????1?1?1G(z)?Ge(z)0.5z(1?0.6z)(1?0.375?z)?1?1?(1?z)(1?0.375z)(1?z?1)(1?0.4z?1)¸÷µã²¨ÐΣº
11r(k)e(k)0.50.50024k68100024k6810
11p(k)0.50-0.5024k6810y(k)0.50024k6810×¢Ò⣺°´×îÉÙÅÄÎÞÎÆ²¨Ë涯ϵͳÉè¼Æ·½·¨£¬p(k)²»»áÓÐÎÆ²¨¡£ ÐòÁÐÊý¾Ý:
k: 0 1 2 3 4 5 6 7 r(k): 1 1 1 1 1 1 1 1 e(k): 1.000 0.375 0.000 0.000 0.000 0.000 0.000 0.000 p(k): 1.250 -0.500 0.000 0.000 0.000 0.000 0.000 0.000 y(k): 0.000 0.625 1.000 1.000 1.000 1.000 1.000 1.000
(2)ÔÚµ¥Î»ËÙ¶ÈÐźż¤ÀøÏÂ:
T?z?10.5z?1(1?0.6z?1),G(z)? R(z)??12?1?1(1?z)(1?z)(1?0.4z)-1
ÒòΪG(z)º¬ÓÐÒò×Óz?1ºÍÁãµãz=-0.6£¬Òò´Ë£¬¦µ(z)ÖÐÓ¦º¬ÓÐz?1¡¢(1+0.6z)ÏG(z)·ÖĸºÍR(z)¾ù
ÓÐ(1?z?1)Òò×ÓÔòGe(z)Ó¦°üº¬(1?z?1)£»ÓÖÒòΪ¦µ(z)?1?Ge(z)£¬¦µ(z)ºÍGe(z)Ó¦¸ÃÊÇz?1ͬ½×´ÎµÄ¶àÏîʽ£¬ËùÒÔÓУº
?1?1?1?1?2?3???(z)?1?Ge(z)?a?z(1?0.6?z)(1?b?z)?az?a?(0.6?b)?z?a?0.6?b?z ??12?1?1?2?1?1?2?3??Ge(z)?(1?z)(1?c?z)?(1?2z?z)?(1?c?z)?1?(?2?c)?z?(1?2?c)?z?c?zʽÖÐa¡¢b¡¢cΪ´ý¶¨ÏµÊý£¬Óɴ˵÷½³Ì×飺
- 3-9 -
¡¶¼ÆËã»ú¿ØÖƼ¼Êõ¼°ÆäÓ¦Óá· µÚ3Õ Êý×Ö¿ØÖÆÆ÷µÄÉè¼ÆÓëʵÏÖ Ë¼¿¼ÌâÓëϰÌâ Ö¸µ¼ÐÅÏ¢
?a??(?2?c)??a?(0.6?b)??(1?2?c) ?a?0.6?b??c?Çó½âÉÏÊö·½³Ì×é¿ÉµÃ£ºa =1.484;b =-0.579;c =0.516¡£
(²Î¿¼MATLABÃüÁ[a,b,c]=solve('a=-(-2+c)','a*(0.6+b)=-(1-2*c)','a*0.6*b=-c');)
?1?1?1???(z)?1?Ge(z)?1.484z(1?0.6?z)(1-0.579z) ??12?1?1?2?1??Ge(z)?(1?z)(1?0.516z)?(1?2z?z)?(1?0.516z)?1?z?2?0.516z?3??(z)?1?Ge(z)?1.484z 0.031»ò?
?1?2?3?z?0.516z?Ge(z)?1?1.484z? 0.031½«ÉÏÃæÁ½Ê½´úÈ룬¿ÉÇó³öÊý×Ö¿ØÖÆÆ÷µÄÂö³å´«µÝº¯Êý
¦µ(z)1.484z?1(1?0.6?z?1)(1-0.578z?1)D(z)??G(z)?Ge(z)0.5z?1(1?0.6z?1)?(1?z?1)2(1?0.516z?1)?1?1 (1?z)(1?0.4z)2.968?(1?0.4z?1)(1-0.578z?1)?(1?z?1)(1?0.516z?1)¸÷µã²¨ÐΣº
1015e(k)024k6810r(k)0.500024k6810
3210p(k)y(k)10024k681050024k6810
×¢Ò⣺°´×îÉÙÅÄÎÞÎÆ²¨Ë涯ϵͳÉè¼Æ·½·¨£¬p(k)²»»áÓÐÎÆ²¨¡£ ÐòÁÐÊý¾Ý:
k: 0 1 2 3 4 5 6 7 r(k): 0 1 2 3 4 5 6 7 e(k): 0.000 1.000 0.516 0.001 0.001 0.002 0.002 0.002 p(k): 0.000 2.968 0.062 0.750 0.750 0.750 0.750 0.750
- 3-10 -
¡¶¼ÆËã»ú¿ØÖƼ¼Êõ¼°ÆäÓ¦Óá· µÚ3Õ Êý×Ö¿ØÖÆÆ÷µÄÉè¼ÆÓëʵÏÖ Ë¼¿¼ÌâÓëϰÌâ Ö¸µ¼ÐÅÏ¢
y(k): 0.000 0.000 1.484 2.999 3.999 4.998 5.998 6.998
(3)ÔÚ½×Ô¾Ðźż¤ÀøÏÂ:
12?z?1(1?1.5z?1)(1?0.1z?1)R(z)? G(z)?1?z?1(1?z?1)(1?0.6z?1)(1?0.2z?1)-1-1
ÓÉG(z)¿ÉÖª¦µ(z) Ó¦°üÀ¨z?1ºÍ(1+1.5z)ºÍ(1+0.1z)Òò×Ó£»ÓÉG(z)ºÍR(z¿ÉÖªGe(z)Ó¦°üº¬(1?z?1)Òò×Ó£»¦µ(z)ºÍGe(z)Ó¦¸ÃÊÇz?1ͬ½×´ÎµÄ¶àÏîʽ£¬ËùÒÔÓУº
?1?1?1?1???(z)?1?Ge(z)?az(1?1.5z)(1?0.1z)(1?bz) ??1?1?2??Ge(z)?(1?z)(1?cz?dz)?1?1?1???(z)?1?Ge(z)?az(1?1.5z)(1?0.1z) ??1?1?2??Ge(z)?(1?z)(1?bz?cz)
Á½Ê½ÖеÄa,b,c,dΪ´ý¶¨ÏµÊý¡£a =4/11;b =7/11;c =3/55;
(²Î¿¼MATLABÃüÁ[a,b,c]=solve('3/20*a=c','(8/5*a)=-(c-b)','a=-(b-1)')) ÇóµÃ£ºa =4/11,b =7/11,c =3/55,ÔòÓУº
?1?1?1???(z)?1?Ge(z)?4/11?z(1?1.5z)(1?0.1z) ??1?1?2??Ge(z)?(1?z)(1?7/11z?3/55z)½«ÉÏÃæÁ½Ê½´úÈ룬¿ÉÇó³öÊý×Ö¿ØÖÆÆ÷µÄÂö³å´«µÝº¯Êý
D(z)?¦µ(z)G(z)?Ge(z)4/11?z?1(1?1.5z?1)(1?0.1z?1)?
2?z?1(1?1.5z?1)(1?0.1z?1)?(1?z?1)(1?7/11z?1?3/55z?2)?1?1?1(1?z)(1?0.6z)(1?0.2z)2/11?(1?0.6z?1)(1?0.2z?1)?(1?7/11z?1?3/55z?2)¸÷µã²¨ÐΣº
10.810.80.40.20024k6810e(k)r(k)0.60.60.40.20024k6810
- 3-11 -
¡¶¼ÆËã»ú¿ØÖƼ¼Êõ¼°ÆäÓ¦Óá· µÚ3Õ Êý×Ö¿ØÖÆÆ÷µÄÉè¼ÆÓëʵÏÖ Ë¼¿¼ÌâÓëϰÌâ Ö¸µ¼ÐÅÏ¢
10.10.8p(k)0-0.1024k6810y(k)0.60.40.20024k6810
ÐòÁÐÊý¾Ý:
k: 0 1 2 3 4 5 6 7 r(k): 1 1 1 1 1 1 1 1 e(k): 1.000 0.636 0.055 0.000 0.000 0.000 0.000 0.000 p(k): 0.182 -0.145 0.022 -0.000 0.000 -0.000 0.000 -0.000 y(k): 0.000 0.364 0.945 1.000 1.000 1.000 1.000 1.000
(4)ÔÚµ¥Î»ËÙ¶ÈÐźż¤ÀøÏÂ:
T?z?12?z?1(1?1.5z?1)(1?0.1z?1)R(z)?G(z)??12?1?1?1(1?z)(1?z)(1?0.6z)(1?0.2z) ,
-1-1
ÓÉG(z)¿ÉÖª¦µ(z) Ó¦°üÀ¨z?1ºÍ(1+1.5z)ºÍ(1+0.1z)Òò×Ó£»ÓÉG(z)ºÍR(z¿ÉÖªGe(z)Ó¦°üº¬(1?z?1)Òò×Ó£»¦µ(z)ºÍGe(z)Ó¦¸ÃÊÇz?1ͬ½×´ÎµÄ¶àÏîʽ£¬ËùÒÔÓУº
?1?1?1?1???(z)?1?Ge(z)?az(1?1.5z)(1?0.1z)(1?bz) ??12?1??Ge(z)?(1?z)(1?cz)(²Î¿¼MATLABÃüÁ[a,b,c,d]= solve('3/20*a*b=-d','(8/5*a*b+3/20*a)=(2*d-c)', '(a*b+8/5*a)= (-d+2*c-1)' , 'a=(-c+2)' ) )
ÇóµÃ£ºa =592/605,b =-93/148,c =618/605,d =279/3025.,ÒÔ¼°£º
?1?1?1?z?1)??(z)?1?Ge(z)?592/605?z(1?1.5z)(1?0.1z)(1?93/148 ??12?1?2?z?279/3025z)?Ge(z)?(1?z)(1?618/605½«ÉÏÃæÁ½Ê½´úÈ룬¿ÉÇó³öÊý×Ö¿ØÖÆÆ÷µÄÂö³å´«µÝº¯Êý
D(z)?¦µ(z)G(z)?Ge(z)592/605?z?1(1?1.5z?1)(1?0.1z?1)(1?93/148z?1)?
2?z?1(1?1.5z?1)(1?0.1z?1)?(1?z?1)2(1?618/605z?1?279/3025z?2)?1?1?1(1?z)(1?0.6z)(1?0.2z)296/605?(1?93/148z?1)(1?0.6z?1)(1?0.2z?1)?(1?z?1)(1?618/605z?1?279/3025z?2)¸÷µã²¨ÐΣº
- 3-12 -
¡¶¼ÆËã»ú¿ØÖƼ¼Êõ¼°ÆäÓ¦Óá· µÚ3Õ Êý×Ö¿ØÖÆÆ÷µÄÉè¼ÆÓëʵÏÖ Ë¼¿¼ÌâÓëϰÌâ Ö¸µ¼ÐÅÏ¢
10810.8420024k6810e(k)r(k)60.60.40.20024k6810
108
0.4p(k)y(k)024k68100.20-0.26420024k6810ÐòÁÐÊý¾Ý£º
k: 0 1 2 3 4 5 6 7 r(k): 0 1 2 3 4 5 6 7 e(k): 0.000 1.000 1.021 0.092 0.000 0.000 0.000 0.000 p(k): 0.000 0.489 -0.210 0.095 0.058 0.058 0.058 0.058 y(k): 0.000 0.000 0.979 2.908 4.000 5.000 6.000 7.000
¸½£º²»Í¬ÊäÈëÐźÅϵĸ÷µã²¨ÐΣº (1)ÔÚÈý¸ö½×Ô¾Ðźż¤ÀøÏÂ:
0.5z?1(1?0.6z?1)¦µ(z)1.25?(1?0.4z?1)1G(z)?D(z)??R(z)??1?1?1(1?z)(1?0.4z)£¬G(z)?Ge(z)(1?0.375?z?1) 1?z,
3210.8e(k)0510k152025r(k)0.60.40.21000510k152025
- 3-13 -
¡¶¼ÆËã»ú¿ØÖƼ¼Êõ¼°ÆäÓ¦Óá· µÚ3Õ Êý×Ö¿ØÖÆÆ÷µÄÉè¼ÆÓëʵÏÖ Ë¼¿¼ÌâÓëϰÌâ Ö¸µ¼ÐÅÏ¢
1.513210p(k)0.50-0.50510k152025y(k)0510k152025Èç¹ûÊäÈëÊÇËٶȺ¯Êý£¬Ôò»á´æÔÚÎó²î£¬ÈçÏÂËùʾ£º
61e(k)0510k152025r(k)4200-10510k152025
10.56p(k)y(k)0510k1520250-0.5-14200510k152025
(2)ÔÚÈý¸öµ¥Î»ËÙ¶ÈÐźż¤ÀøÏÂ:
T?z?10.5z?1(1?0.6z?1),G(z)? R(z)??12?1?1(1?z)(1?z)(1?0.4z)¦µ(z)2.968?(1?0.4z?1)(1-0.578z?1)D(z)??G(z)?Ge(z)(1?z?1)(1?0.516z?1)
- 3-14 -
¡¶¼ÆËã»ú¿ØÖƼ¼Êõ¼°ÆäÓ¦Óá· µÚ3Õ Êý×Ö¿ØÖÆÆ÷µÄÉè¼ÆÓëʵÏÖ Ë¼¿¼ÌâÓëϰÌâ Ö¸µ¼ÐÅÏ¢
160.5r(k)420e(k)0510k815200-0.5-10510k1520
26p(k)0-20510k1520y(k)4200510k1520 (3)ÔÚÈý¸ö½×Ô¾Ðźż¤ÀøÏÂ:
?1?1?11G(z)?2?z(1?1.5z)(1?0.1z)R(z)?(1?z?1)(1?0.6z?1)(1?0.2z?1) 1?z?1
¦µ(z)2/11?(1?0.6z?1)(1?0.2z?1)D(z)??G(z)?Ge(z)(1?7/11z?1?3/55z?2)
3210.8e(k)0510k152025r(k)0.60.40.21000510k152025
- 3-15 -
¡¶¼ÆËã»ú¿ØÖƼ¼Êõ¼°ÆäÓ¦Óá· µÚ3Õ Êý×Ö¿ØÖÆÆ÷µÄÉè¼ÆÓëʵÏÖ Ë¼¿¼ÌâÓëϰÌâ Ö¸µ¼ÐÅÏ¢
0.20.1321p(k)0-0.10510k152025y(k)00510k152025 (4)ÔÚÈý¸öµ¥Î»ËÙ¶ÈÐźż¤ÀøÏÂ:
T?z?12?z?1(1?1.5z?1)(1?0.1z?1),R(z)? G(z)?(1?z?1)2(1?z?1)(1?0.6z?1)(1?0.2z?1)¦µ(z)296/605?(1?93/148z?1)(1?0.6z?1)(1?0.2z?1)D(z)??G(z)?Ge(z)(1?z?1)(1?618/605z?1?279/3025z?2)160.5
e(k)0510k152025r(k)4200-0.5-10510k152025
0.586
p(k)y(k)0510k152025042-0.500510k152025
11. ¸ù¾ÝÏÂÁпØÖÆÆ÷µÄD(z)£¬·Ö±ð»³öÖ±½Óʽ¡¢´®ÐÐʵÏÖ·¨ºÍ²¢ÐÐʵÏÖ·¨µÄʵÏÖ¿òͼºÍÏàÓ¦µÄÊä³ö·½³ÌºÍ״̬·½³Ì¡£
3?3.6z?1?0.6z?20.2?0.1z?1?z?2D1(z)?D2(z)??1?21?0.1z?0.2z¡¢1?2z?1?3z?2
[Ö¸µ¼ÐÅÏ¢]: ²Î¼û3.5.1 ʵÏÖ¿òͼÓëËã·¨¡£
£¨1£©¶ÔD1(z)£¬²ÉÓÃÖ±½Óʽ1ºÍÖ±½Óʽ2µÄʵÏÖ¿òͼÈçÏ£º
- 3-16 -
¡¶¼ÆËã»ú¿ØÖƼ¼Êõ¼°ÆäÓ¦Óá·
E(z)P(z)x1Z-1µÚ3Õ Êý×Ö¿ØÖÆÆ÷µÄÉè¼ÆÓëʵÏÖ Ë¼¿¼ÌâÓëϰÌâ Ö¸µ¼ÐÅÏ¢
E(z)P(z)3++Z-13x1+3.6+-0.1x2-0.1Z-13.6Z-10.6+(a)0.20.2(b)x20.6D1(z)¶ÔÓ¦Ö±½Óʽ1ʵÏÖ¿òͼµÄ״̬·½³ÌºÍÊä³ö·½³ÌÈçÏ£º ״̬·½³Ì£º
?x1(k?1)?(?0.1)?x1(k)?x2(k)?(3.6?(3?(?0.1))?e(k)??0.1?x1(k)?x2(k)?3.3?e(k) ?x2(k?1)?0.2?x1(k)?(0.6?(3?(0.2))?e(k)?0.2?x1(k)?1.2?e(k)?Êä³ö·½³Ì£º
p(k)?x1(k)?3?e(k)
D1(z)¶ÔÓ¦Ö±½Óʽ2ʵÏÖ¿òͼµÄ״̬·½³ÌºÍÊä³ö·½³ÌÈçÏ£º ״̬·½³Ì£º
?x1(k?1)?(?0.1)?x1(k)?(0.2)?x2(k)?e(k)??0.1?x1(k)?0.2?x2(k)?e(k) ?x2(k?1)?x1(k)?Êä³ö·½³Ì£º1¡¤
p(k)?(?0.1*3?3.6)?x1(k)?(0.2*3?0.6)?x2(k)?3?e(k)
?3.3?x1(k)?1.2?x2(k)?3?e(k)D1(z)´®ÐÐʵÏÖ·¨µÄ±í´ïʽΪ£º
3?3.6z?1?0.6z?23?(1?z?1)?(1?0.2z?1)(1?z?1)(1?0.2z?1) D1(z)???3???1?2?1?1?1?11?0.1z?0.2z(1?0.5z)?(1?0.4z)(1?0.5z)(1?0.4z)£¨ÊµÏÖ¿òͼÂÔ¡££©
D1(z)²¢ÐÐʵÏÖ·¨µÄ±í´ïʽΪ£º
3?3.6z?1?0.6z?2?17 D1(z)???3???1?2?1?11?0.1z?0.2z(1?0.5z)(1?0.4z)£¨ÊµÏÖ¿òͼÂÔ¡££©
£¨2£©¶ÔD2(z)£¬²ÉÓÃÖ±½Óʽ1ºÍÖ±½Óʽ2µÄʵÏÖ¿òͼÈçÏ£º
- 3-17 -
¡¶¼ÆËã»ú¿ØÖƼ¼Êõ¼°ÆäÓ¦Óá·
E(z)P(z)x1Z-1µÚ3Õ Êý×Ö¿ØÖÆÆ÷µÄÉè¼ÆÓëʵÏÖ Ë¼¿¼ÌâÓëϰÌâ Ö¸µ¼ÐÅÏ¢
E(z)P(z)0.2++Z-10.2x1+0.1+2x22Z-10.1Z-1-1+(a)33(b)x2-1D2(z)¶ÔÓ¦Ö±½Óʽ1ʵÏÖ¿òͼµÄ״̬·½³ÌºÍÊä³ö·½³ÌÈçÏ£º ״̬·½³Ì£º
?x1(k?1)?2?x1(k)?x2(k)?(0.1?0.2?2)?e(k)?2?x1(k)?x2(k)?0.5?e(k) ?x2(k?1)?3?x1(k)?(?1?0.2?3)?e(k)?3?x1(k)?0.4?e(k)?Êä³ö·½³Ì£º
p(k)?x1(k)?0.2?e(k)
D2(z)¶ÔÓ¦Ö±½Óʽ2ʵÏÖ¿òͼµÄ״̬·½³ÌºÍÊä³ö·½³ÌÈçÏ£º ״̬·½³Ì£º
?x1(k?1)?2?x1(k)?3?x2(k)?e(k) ?x2(k?1)?x1(k)?Êä³ö·½³Ì£º
p(k)?(0.2*2?0.1)?x1(k)?(0.2*3?1)?x2(k)?0.2?e(k)
?0.5?x1(k)?0.4?x2(k)?0.2?e(k)D2(z)´®ÐÐʵÏÖ·¨µÄ±í´ïʽΪ£º
0.2?0.1z?1?1z?20.2?(1?2.5z?1)?(1?2z?1)(1?2.5z?1)(1?2z?1) D1(z)???0.2???1?2?1?1?1?11?2z?3z(1?3z)?(1?z)(1?3z)(1?z)£¨ÊµÏÖ¿òͼÂÔ¡££©
D2(z)²¢ÐÐʵÏÖ·¨µÄ±í´ïʽΪ£º
0.2?0.1z?1?z?2D1(z)?1?2z?1?3z?210.2*(1?2.4/3)*(1?2/3)*3/40.2*(?1.5)*3/4???? ?1?13(1?3z)(1?z)10.09?0.225????3(1?3z?1)(1?z?1)£¨ÊµÏÖ¿òͼÂÔ¡££©
- 3-18 -
¡¶¼ÆËã»ú¿ØÖƼ¼Êõ¼°ÆäÓ¦Óá· µÚ4Õ ¿ØÖÆÏµÍ³ÖеļÆËã»ú¼°Æä½Ó¿Ú¼¼Êõ ˼¿¼ÌâÓëϰÌâ Ö¸µ¼ÐÅÏ¢
µÚ4Õ ¿ØÖÆÏµÍ³ÖеļÆËã»ú¼°Æä½Ó¿Ú¼¼Êõ
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