Show that if a linear dynamical equation is controllable at $t_0$, then it is controllable at any $t<t_0$.











up vote
0
down vote

favorite












Consider a $n$-dimentional $p$-input equation:
$$dot{x}=Ax+Bu$$
where $A$ and $B$ are constant $ntimes n$ and $ntimes p$ real matrices.



By definition, the latter state equation is said to be controllable if for any initial state $x(0)=x_0$ and any final state $x_1$, there exists an input that transfers $x_0$ to $x_1$ in a finite time.



Then, how can I show that if a linear dynamical equation is controllable at $t_0$ then it is controllable at any $t<t_0$?.



I hope that you can help me.










share|cite|improve this question









New contributor




Ali G is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.




















  • Do you mean a linear time invariant system, because general linear systems also include linear time variant systems?
    – Kwin van der Veen
    Nov 22 at 0:20










  • yeah linear time invariant system
    – Ali G
    Nov 22 at 3:54










  • Without loss of gbenerality, you can show if the terminal state $x_1=0$ at time $t_0$, then $x(t)=0$ for all $t>t_0$ .
    – Gustave
    2 days ago















up vote
0
down vote

favorite












Consider a $n$-dimentional $p$-input equation:
$$dot{x}=Ax+Bu$$
where $A$ and $B$ are constant $ntimes n$ and $ntimes p$ real matrices.



By definition, the latter state equation is said to be controllable if for any initial state $x(0)=x_0$ and any final state $x_1$, there exists an input that transfers $x_0$ to $x_1$ in a finite time.



Then, how can I show that if a linear dynamical equation is controllable at $t_0$ then it is controllable at any $t<t_0$?.



I hope that you can help me.










share|cite|improve this question









New contributor




Ali G is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.




















  • Do you mean a linear time invariant system, because general linear systems also include linear time variant systems?
    – Kwin van der Veen
    Nov 22 at 0:20










  • yeah linear time invariant system
    – Ali G
    Nov 22 at 3:54










  • Without loss of gbenerality, you can show if the terminal state $x_1=0$ at time $t_0$, then $x(t)=0$ for all $t>t_0$ .
    – Gustave
    2 days ago













up vote
0
down vote

favorite









up vote
0
down vote

favorite











Consider a $n$-dimentional $p$-input equation:
$$dot{x}=Ax+Bu$$
where $A$ and $B$ are constant $ntimes n$ and $ntimes p$ real matrices.



By definition, the latter state equation is said to be controllable if for any initial state $x(0)=x_0$ and any final state $x_1$, there exists an input that transfers $x_0$ to $x_1$ in a finite time.



Then, how can I show that if a linear dynamical equation is controllable at $t_0$ then it is controllable at any $t<t_0$?.



I hope that you can help me.










share|cite|improve this question









New contributor




Ali G is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.











Consider a $n$-dimentional $p$-input equation:
$$dot{x}=Ax+Bu$$
where $A$ and $B$ are constant $ntimes n$ and $ntimes p$ real matrices.



By definition, the latter state equation is said to be controllable if for any initial state $x(0)=x_0$ and any final state $x_1$, there exists an input that transfers $x_0$ to $x_1$ in a finite time.



Then, how can I show that if a linear dynamical equation is controllable at $t_0$ then it is controllable at any $t<t_0$?.



I hope that you can help me.







control-theory linear-control






share|cite|improve this question









New contributor




Ali G is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.











share|cite|improve this question









New contributor




Ali G is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.









share|cite|improve this question




share|cite|improve this question








edited Nov 22 at 1:45









GuadalupeAnimation

1659




1659






New contributor




Ali G is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.









asked Nov 21 at 23:08









Ali G

62




62




New contributor




Ali G is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.





New contributor





Ali G is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.






Ali G is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.












  • Do you mean a linear time invariant system, because general linear systems also include linear time variant systems?
    – Kwin van der Veen
    Nov 22 at 0:20










  • yeah linear time invariant system
    – Ali G
    Nov 22 at 3:54










  • Without loss of gbenerality, you can show if the terminal state $x_1=0$ at time $t_0$, then $x(t)=0$ for all $t>t_0$ .
    – Gustave
    2 days ago


















  • Do you mean a linear time invariant system, because general linear systems also include linear time variant systems?
    – Kwin van der Veen
    Nov 22 at 0:20










  • yeah linear time invariant system
    – Ali G
    Nov 22 at 3:54










  • Without loss of gbenerality, you can show if the terminal state $x_1=0$ at time $t_0$, then $x(t)=0$ for all $t>t_0$ .
    – Gustave
    2 days ago
















Do you mean a linear time invariant system, because general linear systems also include linear time variant systems?
– Kwin van der Veen
Nov 22 at 0:20




Do you mean a linear time invariant system, because general linear systems also include linear time variant systems?
– Kwin van der Veen
Nov 22 at 0:20












yeah linear time invariant system
– Ali G
Nov 22 at 3:54




yeah linear time invariant system
– Ali G
Nov 22 at 3:54












Without loss of gbenerality, you can show if the terminal state $x_1=0$ at time $t_0$, then $x(t)=0$ for all $t>t_0$ .
– Gustave
2 days ago




Without loss of gbenerality, you can show if the terminal state $x_1=0$ at time $t_0$, then $x(t)=0$ for all $t>t_0$ .
– Gustave
2 days ago















active

oldest

votes











Your Answer





StackExchange.ifUsing("editor", function () {
return StackExchange.using("mathjaxEditing", function () {
StackExchange.MarkdownEditor.creationCallbacks.add(function (editor, postfix) {
StackExchange.mathjaxEditing.prepareWmdForMathJax(editor, postfix, [["$", "$"], ["\\(","\\)"]]);
});
});
}, "mathjax-editing");

StackExchange.ready(function() {
var channelOptions = {
tags: "".split(" "),
id: "69"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);

StackExchange.using("externalEditor", function() {
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled) {
StackExchange.using("snippets", function() {
createEditor();
});
}
else {
createEditor();
}
});

function createEditor() {
StackExchange.prepareEditor({
heartbeatType: 'answer',
convertImagesToLinks: true,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: 10,
bindNavPrevention: true,
postfix: "",
imageUploader: {
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
},
noCode: true, onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
});


}
});






Ali G is a new contributor. Be nice, and check out our Code of Conduct.










 

draft saved


draft discarded


















StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fmath.stackexchange.com%2fquestions%2f3008510%2fshow-that-if-a-linear-dynamical-equation-is-controllable-at-t-0-then-it-is-co%23new-answer', 'question_page');
}
);

Post as a guest















Required, but never shown






























active

oldest

votes













active

oldest

votes









active

oldest

votes






active

oldest

votes








Ali G is a new contributor. Be nice, and check out our Code of Conduct.










 

draft saved


draft discarded


















Ali G is a new contributor. Be nice, and check out our Code of Conduct.













Ali G is a new contributor. Be nice, and check out our Code of Conduct.












Ali G is a new contributor. Be nice, and check out our Code of Conduct.















 


draft saved


draft discarded














StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fmath.stackexchange.com%2fquestions%2f3008510%2fshow-that-if-a-linear-dynamical-equation-is-controllable-at-t-0-then-it-is-co%23new-answer', 'question_page');
}
);

Post as a guest















Required, but never shown





















































Required, but never shown














Required, but never shown












Required, but never shown







Required, but never shown

































Required, but never shown














Required, but never shown












Required, but never shown







Required, but never shown







Popular posts from this blog

Berounka

Sphinx de Gizeh

Different font size/position of beamer's navigation symbols template's content depending on regular/plain...