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思路岛答案网章“状态方程的解”习题解答3.1计算下列矩阵的矩阵指数teA。200200(1)020;(2)031002003AA0001(3);(4)1040AA(1)解222000000tttteeeeA(2)解233300000ttttteeeteeA(3)解122011001111ssssssssssIAIA11101tteLsttAIA(4)解:14sssIA思路岛答案网整理提供1222221144124242244ssssssssssIA221221242422441cos2sin222sin2cos2tssseLsssttttA3.2已知系统状态方程和初始条件为1001010,000121xxx(1)试用拉氏变换法求其状态转移矩阵;(2)试用化对角标准形法求其状态转移矩阵;(3)试用化teA为有限项法求其状态转移矩阵;(4)根据所给初始条件,求齐次状态方程的解。(1)解12100010012OOAAA,其中,12101,12AA则有1200ttteeeAAA而1tteeA,2112teLsAIA思路岛答案网整理提供112101220111(1)(2)101111212sssssssssssIA2112220ttttteeLseeeAIA所以状态转移矩阵为112200000tttttteeLseeeeAIA(2)解210(1)(2)012IA121,2对于11,1000111011PP对于22,2210001001PP110101111PP思路岛答案网APP2200000tttttteeeeeeP(3)解矩阵的特征值为1,21,32对于32有:2012()2()4()tettt对于1,21有:012()()()tettt因为是二重特征值,故需补充方程12()2()ttett从而联立求解,得:202122()2()322()tttttttttetetteeeteete思路岛答案网整理提供20122222222()()()20010002032201000201210010001001001201200000ttttttttttttttttttettteteeteteeeeteeeteeeeeeAIAA(4)解:0)0222()()(0)001000001ttttttttttteteeeeeeeeA(Axxx3.3矩阵A是22的常数矩阵,关于系统的状态方程式xAx,有1(0)1x时,22tteex2(0)1x时,2tteex试确定这个系统的状态转移矩阵(,0)t和矩阵A。解:因为系统的零输入响应是(,0)(0)ttxx所以思路岛答案网(,0)1ttete,22(,0)1ttete将它们综合起来,得22122(,0)11tttteetee122222222122(,0)11122112222tttttttttttttttteeteeeeeeeeeeeeee而状态转移矩阵的性质可知,状态转移矩阵0(,)tt满足微分方程00,,dttttdtA和初始条件00,ttI因此代入初始时间00t可得矩阵A为:0100022220(,)(,)2224240213tttttttttttdttttdteeeeeeeeA3.9已知系统xAx的转移矩阵0(,)tt是2202222()(,)2tttttttteeeetteeee时,试确定矩阵A。思路岛答案网(,)tt是状态转移矩阵,所以有00(,)(,)dttttdtA将00t,00(,)ttI代入得:0213A3.10已知系统状态空间表达式为011341uxx11yx(1)求系统的单位阶跃响应;(2)求系统的脉冲响应。(1)解0134A,1,111BC1(4)3(3)(1)034IA121,311时,1111013301PP23时,2231013103PP1113P思路岛答案网P133333331110022131100223111222233132222ttttttttttttteeeeeeeeeeeeeAPP将()1()utt代入求解公式得:3313323111(0)2222()(0)33132222tttttttteeeextxeeeex+3()3()3()3()013112333ttttttttteeeedeeee331233123(0)(0)122333(0)(0)122tttttttttteeeexxeeeeexxe若取(0)0x,则有1()1ttetex111()11221ttteyteex(2)解由(1)知思路岛答案网A33333111222233132222tttttttteeeeeeee取()(0)ut,则有3313323()3()3()3()03312313111(0)2222()(0)33132222131(0)123333(0)(0)2233(0)2tttttttttttttttttttttttteeeextxeeeeeeeedeeeeeeeexxeeexx323(0)2ttteexe若取0(0)0x,则有()ttetex,()112ttteytee3.11求下列系统在输入作用为:①脉冲函数;②单位阶跃函数;③单位斜坡函数下的状态响应。(1)1001abaubabxx(2)0101uababxx(1)解0000attbtaeebeAA①()()utt,思路岛答案网整理提供()1()02121000001001(0)1(0)atattbtbtatatbtbtxeebatdxeeabexebaexebax取00x,则11atbtebatebax②1utt,()1()021201101(0)()()1(0)()()atattbtbtatatbtbtexetdexbaeeexabaabaeexbbabbax若取00x,则有1()()1()()atbteabaabatebbabbax③utt,()1()20(0)1(0)tatatbtbtexettdbaexex思路岛答案网整理提供221222122222101011010atatbtbtatatbtbtteexaaaexbatebbbteexabaabaabateexbbabbabba若取00x,则有222211atbtteabaabaabattebbabbabbax(2)解010,1ababAB10abababababIA所以12,ab1a时,111010aabbaPP2b时,221010bababPP11abP思路岛答案网P11110011001atattbtbtatbtatbtatbtatbtbeeeabaabeebeaeeeababeabeaebeAPP①()()utt,12()()()()()()()()0(0)1(0)01(0)1()1atbtatbtatbtatbttatbtatbt
本文标题:现代控制理论-东北大学高立群-清华大学出版社-第3章
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