PID in ThingSpeak code
显示 更早的评论
I tried to write pid code in thingspeak app matlab analysis, but I faced some problem. Can anyone help?
sensed_output = thingSpeakRead(readChannelID), control_signal;
setpoint=23;
Kp = 1;
Ki = 1;
Kd = 1;
T= 5000;
double total_error, last_error;
int max_control=100;
int min_control=0
double error = setpoint - sensed_output;
total_error += error;
if total_error >= max_control
total_error = max_control;
elseif total_error <= min_control
total_error = min_control;
else
total_error = total_error;
end
double delta_error = error - last _error;
control_signal = Kp*error + (Ki*T)*total_error + (Kd/T)*delta_error;
if control_signal >= max_control
control_signal = max_control;
elseif control_signal <= min_control
control_signal = min_control;
else
control_signal = control_signal;
end
last_error = error;
analyzedData = control_signal;00
%% Write Data %%
thingSpeakWrite(writeChannelID, analyzedData, 'WriteKey', writeAPIKey);
1 个评论
Image Analyst
2021-1-23
Do not use double or int before the lines where you assign values.
回答（1 个）
Christopher Stapels
2021-1-25
0 个投票
I'd suggest you have a look at the MATLAB onramp. Its a two hour introduction to MATLAB fundamentals, I think you would find it really helpful. Once you have that down, I think writing the PID code will be much easier.
社区
更多回答在 ThingSpeak Community
类别
在 帮助中心 和 File Exchange 中查找有关 MATLAB Support Package for Raspberry Pi Hardware 的更多信息
产品
2021-1-23
2021-1-25
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!
Translated by 
