Tuning a PID controller with real time sensor input ?

Hi all

I understand that it is possible to tune a PID controller according to various inputs, such as a RNG source block, a sine wave block, CSV value files etc.

However, how does one tune a PID controller using real time sensor data, especially from an android phone's sensors ? For example an accelerometer.

Can a PID controller be tuned interactively with the user moving and rotating the phone around ?

Cheers !!

Answer 1

[Sruthi Yenugula]

You can use TCP/IP blocks on Android to send sensor data to other hardware(Adruino/Rasberry pi/Lego) or host PC.

Check this example

https://www.mathworks.com/help/supportpkg/android/ref/control-lego-mindstorms-ev3-robot-using-android-device.html

[Kiat Nern Yeo]

Hi sir. Thank you for responding to my question.

Do you happen to know the latency of such an operation ? For the communication between android and arduino via Tcp/ip.

I assume that the arduino requires a wifi-board, such as the ESP8266 right ?

In this same regard, is it possible to send processed and calculated values via tcp/ip to the arduino board ?

For example, PWM values ?

Best regards and thank you sir

[Sruthi Yenugula]

Hi Kiat Nern Yao,

Check this example

https://www.mathworks.com/help/supportpkg/arduino/ref/control-brightness-of-arduino-onboard-led-from-android-device.html

Q )In this same regard, is it possible to send processed and calculated values via tcp/ip to the arduino board ?

A) Yes

Q)I assume that the arduino requires a wifi-board, such as the ESP8266 right ?

A)Yes

[Kiat Nern Yeo]

Hi sir thanks for replying.

Is it possible to send those values via the USB wire connected to the Arduino ? Meaning that the android phone and the arduino is connected via the USB-OTG wire.

Can the phone app created in the Simulink software send out values like this ?

Best regards

[Sruthi Yenugula]

Currently Android Support package does'nt have USB-OTG support, you can use ToApp/FromApp block and implement your own USB communication in Android Studio

[Kiat Nern Yeo]

Hello

Is there an example that i can consult and try to learn from for this USB serial communication ?

Thanks !

[Sruthi Yenugula]

We just have examples for usage of fromApp and toApp blocks but nothing related to USB

https://www.mathworks.com/help/supportpkg/android/ref/enhanced-color-replacement-with-customized-code.html

https://www.mathworks.com/help/supportpkg/android/examples/visualize-sensor-data-from-an-android-device-in-rviz-example.html

https://www.mathworks.com/help/supportpkg/android/examples/set-position-of-bebop-drone-on-gazebo-simulator-from-android-device-using-ros.html

[Kiat Nern Yeo]

Ok sir thank you i will look through them