SIGMA : Jurnal Sains Dan Teknologi, Vol. 11, No. 2, Juli 2008 (Rak 7-N : Sains Dan Teknologi) ABSTRAK : This paper discusses optimal control of continuous-time systems, especially continuous-time Linear Quadratic Regulator (LQR). The LQR will be implemented to determine the optimal feedback control of a scalar system. The result of scalar system simulation showed that as the coefficient of stat…