Error using DynamicSystem/lsim

Question

0 个投票

Error using DynamicSystem/lsim (line 84)

When simulating the response to a specific input signal, the input data U must be a matrix of numeric values with at least

two rows (samples) and without any NaN or Inf.

Error in ssQ6B (line 9)

v0=lsim(H,vi,t);

hi i keep getting this error when i run the following code . could anyone help?? Much appreciate

clc;close all;clear all;

syms t;

H=tf(4,[5 5]);

vi=(10.*(sin(10*t))).*(t<=18);

v0=lsim(H,vi,t);

plot(t,v0);xlabel('t');ylabel('v0(t)')

ylim([-0.8,0.8])

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

Answer 1

Alberto Mora 2020-6-23

编辑：Alberto Mora 2020-6-24

2 个投票

Please, do not use symbolic variables for the time array.

t=0:0.01:10;
H=tf(4,[5 5]);
vi=(10.*(sin(10*t))).*(t<=18);
v0=lsim(H,vi,t);
plot(t,v0);xlabel('t');ylabel('v0(t)')

If this helps, consider accepting the answer as a sign of gratitude.