Steady state from data

Matthew Speijer

2021 2 2

1 个回答

回答已采纳

31 次查看（30 天）

0 个投票

Wondering if its possible to find the steady state of a data set through a matlab function. Attached is what I'm working with and the plot is of time and theta_dot. Thanks

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Follow Question

采纳的回答

Mathieu NOE 2021-2-2

在 MATLAB Online 中打开

0 个投票

hello Matthew

see below :

%Import data
load('DCMotor_OL_Data_4.5V_A02.mat')
% smoothin a bit the derivative
theta_dot_smoo = sgolayfilt(theta_dot,1,21);
figure(1);
plot(time,theta_dot,'b',time,theta_dot_smoo,'r');
ylabel('theta dot');
xlabel('Time (s)');
legend('raw','sgolay filtered');
title('theta dot')
% compute steady state values based on smoothed data
threshold = 0.98*theta_dot_smoo(end);  % select only values that are above 98% of the last data y amplitude (smoothed)
ind = find(theta_dot_smoo> threshold);
theta_dot_steady_sate = mean(theta_dot(ind));