how we can create u(n) function in matlab to use in design of descrete pid control design and keeping n as a variable

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shobhit kumar
shobhit kumar 2013-8-1
for eqn Second order plant equation: y(n)=9*u(n-1)-9*u(n-2)+2*y(n-1)+y(n-2) PID controller equation in discrete: u(n)=u(n-1)+Kp*[e(n)-e(n-1)]+Ki*e(n)+Kd*[e(n)-2e(n-1)+e(n-2)]

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