What is DynamicSystem/lsim ?

% Isim Method % %------------------------------------------------------------------ % clc clear ll

% 모드 및 고유진동수 % load('elcen_NS.dat'); MT=[1.0 0.0 0.0; 0.0 1.5 0.0; 0.0 0.0 2.0]; KT=60* [1 -1 0; -1 3 -2; 0 -2 5]; [V, D] = eigs(KT, MT, 3, 'SA'); zeta=0.05 acc_g=-elcen_NS*(9.81); N=length(acc_g); dt=0.02; T=0:dt:dt*(N-1); % % 감쇠행렬 % nXi1 = 1; Xi1 = 0.05; %고유진동수 번호 및 관련 감쇠비 nXi2 = 3; Xi2 = 0.05; RD = sqrt(D); CO =1/2*[1/RD(nXi1,nXi1), RD(nXi1,nXi1); 1/RD(nXi2,nXi2), RD(nXi2,nXi2)]; AB = inv(CO)*[Xi1; Xi2]; CT = AB(1)*MT + AB(2)*KT; % wn=sqrt(MT./KT) [V, wn] = eigs(KT, MT, 3, 'SA');

% % 물리좌표계 응답 %

%..construct the state-space matrices % A=[zeros(3) eye(3);-wn^2 -2*zeta*wn]; % B=[zeros(3);-eye(3)]; % C=[eye(3) zeros(3);zeros(3) eye(3);-wn^2 -2*zeta*wn]; % D=[zeros(3);zeros(3);-eye(3)]; A=[zeros(3) eye(3);-wn^2 -2*zeta*wn]; B=[zeros(3);-eye(3)]; C=[zeros(3) eye(3);-wn^2 -2*zeta*wn]; D=[zeros(3);-eye(3)];

% %..obtain the response time history u=acc_g; [y]=lsim(A,B,C,D,u,T); % y has two columns

--------------------------------------------------------------------------- 다음 사용 중 오류가 발생함: DynamicSystem/lsim (line 84) When simulating the response to a specific input signal, the input data U must be a matrix with as many rows as samples in the time vector T, and as many columns as input channels.

오류 발생: lsim (line 114) [yout,t1,x] = lsim(sys,u,t,x0);

오류 발생: lsim_01 (line 48) [y]=lsim(A,B,C,D,u,T); % y has two columns

help me plz ...