TY - JOUR
T1 - Continuous-time subspace system identification method
AU - Su Whan Sung, Whan Sung
AU - Seong Young Lee, Young Lee
AU - Hee Jin Kwak, Jin Kwak
AU - In-Beum Lee, Lee
PY - 2001/6/27
Y1 - 2001/6/27
N2 - We analyze practical problems of discrete-time subspace system identification methods from the control point of view and develop a new continuous-time subspace system identification method. We use a new transform to obtain the derivative information numerically from the measured process output and the process input. Using the transform, we convert the continuous-time process model composed of differential equations into corresponding algebraic equations. We estimate the process order by inspecting singular values, and subsequently, we determine the continuous-time state space model using the least-squares method. We compare the proposed method with the discrete-time subspace system identification method for a small sampling period.
AB - We analyze practical problems of discrete-time subspace system identification methods from the control point of view and develop a new continuous-time subspace system identification method. We use a new transform to obtain the derivative information numerically from the measured process output and the process input. Using the transform, we convert the continuous-time process model composed of differential equations into corresponding algebraic equations. We estimate the process order by inspecting singular values, and subsequently, we determine the continuous-time state space model using the least-squares method. We compare the proposed method with the discrete-time subspace system identification method for a small sampling period.
UR - http://www.scopus.com/inward/record.url?scp=0035958138&partnerID=8YFLogxK
U2 - 10.1021/ie000069f
DO - 10.1021/ie000069f
M3 - Article
AN - SCOPUS:0035958138
SN - 0888-5885
VL - 40
SP - 2886
EP - 2896
JO - Industrial and Engineering Chemistry Research
JF - Industrial and Engineering Chemistry Research
IS - 13
ER -