%% lqrTrack
% compute an LQR controller
%
%% Syntax
%
% <html>
%        <div class="syntax">
% K = lqrTrack(x0,xf,u,param) <br>
%        </div>
% </html>
%
%% Description
% This function computes the feedback matrix for the tracking
% controller by applying the LQR control approach to the linearized
% system
%
%% Input Arguments
%
%
% <html>
% <table cellspacing="0" cellpadding="4" width="" border="1" frame="box" rules="none" class="">
% <tbody valign="top">
%    <tr bgcolor="#F2F2F2">
%    <td>
%        <p class="table">
%            x0
%        </p>
%    </td>
%    <td>
%        <p class="table">
%            initial state of the considered reference trajectory part
%            (dimension: [nx,1])
%        </p>
%    </td>
%    </tr>
%    <tr bgcolor="#F2F2F2">
%    <td>
%        <p class="table">
%            xf
%        </p>
%    </td>
%    <td>
%        <p class="table">
%            final state of the considered reference trajectory part
%            (dimension: [nx,1])
%        </p>
%    </td>
%    </tr>
%    <tr bgcolor="#F2F2F2">
%    <td>
%        <p class="table">
%            u
%        </p>
%    </td>
%    <td>
%        <p class="table">
%            reference control input for the considered reference
%            trajectory part (dimension: [nu,1])
%        </p>
%    </td>
%    </tr>
%    <tr bgcolor="#F2F2F2">
%    <td>
%        <p class="table">
%            Opts
%        </p>
%    </td>
%    <td>
%        <p class="table">
%            a structure containing following options
%        </p>
%        <p class="table">
% <table cellspacing="0" cellpadding="4" width="" border="1" frame="box" rules="none" class="inner">
% <tbody valign="top">
%    <tr bgcolor="#F2F2F2">
%    <td>
%        <p class="table">
%            .A
%        </p>
%    </td>
%    <td>
%        <p class="table">
%            function handle to the system matrix of the linearized
%            system
%        </p>
%    </td>
%    </tr>
%    <tr bgcolor="#F2F2F2">
%    <td>
%        <p class="table">
%            .B
%        </p>
%    </td>
%    <td>
%        <p class="table">
%            function handle to the input matrix of the linearized
%            system
%        </p>
%    </td>
%    </tr>
%    <tr bgcolor="#F2F2F2">
%    <td>
%        <p class="table">
%            .Q
%        </p>
%    </td>
%    <td>
%        <p class="table">
%            state weighting matrix for LQR control
%            (dimension: [nx,nx])
%        </p>
%    </td>
%    </tr>
%    <tr bgcolor="#F2F2F2">
%    <td>
%        <p class="table">
%            .R
%        </p>
%    </td>
%    <td>
%        <p class="table">
%            input weighting matrix for LQR control
%            (dimension: [nu,nu])
%        </p>
%    </td>
%    </tr>
% </tbody>
% </table>
%        </p>
%    </td>
%    </tr>
% </tbody>
% </table>
% </html>
%
%% Output Arguments
%
%
% <html>
% <table cellspacing="0" cellpadding="4" width="" border="1" frame="box" rules="none" class="">
% <tbody valign="top">
%    <tr bgcolor="#F2F2F2">
%    <td>
%        <p class="table">
%            K
%        </p>
%    </td>
%    <td>
%        <p class="table">
%            computed feedback matrix for the tracking controller
%            (dimension: [nu,nx])
%        </p>
%    </td>
%    </tr>
% </tbody>
% </table>
% </html>
%
%% See Also
% <reachsetMPChelp.html |reachsetMPC|>
%

%%
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%        <tt class="minicdot">&#149;</tt>
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%        <tt class="minicdot">&#149;</tt>
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