Path: news.mathworks.com!not-for-mail From: <HIDDEN> Newsgroups: comp.soft-sys.matlab Subject: Re: control system Date: Wed, 11 Sep 2013 15:20:15 +0000 (UTC) Organization: National Institute of Technology Calicut Lines: 37 Message-ID: <l0q1nf$amc$1@newscl01ah.mathworks.com> References: <l0koal$ql6$1@newscl01ah.mathworks.com> <l0mfv5$9g9$1@speranza.aioe.org> <l0n9fi$bs7$1@newscl01ah.mathworks.com> <l0nlbl$ps2$1@speranza.aioe.org> Reply-To: <HIDDEN> NNTP-Posting-Host: rubyext-03-ls.mathworks.com Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-Trace: newscl01ah.mathworks.com 1378912815 10956 172.20.102.179 (11 Sep 2013 15:20:15 GMT) X-Complaints-To: news@mathworks.com NNTP-Posting-Date: Wed, 11 Sep 2013 15:20:15 +0000 (UTC) X-Newsreader: MATLAB Central Newsreader 4566741 Xref: news.mathworks.com comp.soft-sys.matlab:802226 "Nasser M. Abbasi" wrote in message <l0nlbl$ps2$1@speranza.aioe.org>... > On 9/10/2013 9:14 AM, ROHIT MISHRA wrote: > > "Nasser M. Abbasi" wrote in message <l0mfv5$9g9$1@speranza.aioe.org>... > >> On 9/9/2013 10:09 AM, ROHIT MISHRA wrote: > >>> A=[0 1;2 3] ,B=[0 ; 1] and initial condition is x0=[1;0] > >>> how to find the forced response of the above system using the above matrix in state space analysis of control system. > >>> plz tell me how to do this problem. > >>> > >> > >> may be > >> > >> ---------------------------- > >> clear all > >> A = [0 1;2 3]; B = [0 ; 1]; x0 = [1;0]; > >> sys = ss(A,B,[0 1],[]); > >> initial(sys,x0,16.4) > >> ---------------------- > > > > i want value of X1(t) and x2(t) not the plot....your help was appreciated > > > > Then why not simply solve the differential equation? > > You have the differential equation right there? You defined it. > use ode45 if all what you want is the solution. > > I have not played with control systems for sometime. Did you > try to read the documentation to find if there is away to > find x(t) direclty from state space? > > --Nasser > i hav solved the problem by solving the entire equation of x(t) which involves integral and non integral terms.since the length of the solution became huge so i was trying to find a shorter way...i hav seen the ode45 command but didnt used it ...i will definitely try to solve the state equation using it...thanks 4 d help.......................ROHIT