Edit: GIVEAWAY WINNERS ๐
The giveaway has ended. Thank you everyone who entered! Congratulations to our winners: u/Proudhon_Fan69 & u/kettletrvb to win the Inkbird PID Temp Controller Kit & PID Junction Box๏ผ Please check your inbox, I send you a message. ๐
If you're no the lucky one, don't fret.. We offer 15% off promo codes for the temp controller and the heat mat.
USA store:
PID temp controller๏ผ RG2ZU2K9 https://amzn.to/3ujDhAY
Junction box๏ผNY8YJ4WR https://amzn.to/3bRCz7R
Canada store:
PID temp controller๏ผ WZMASA8J https://amzn.to/3gfpCI9
Junction box๏ผMQCJLVBD https://amzn.to/32cBd2b
Thank you for your kind support and enthusiasm for Inkbird. ๐
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Thank you u/chino_brewsย making this giveaway happen! ๐
It's time to have another GIVEAWAY for you guys here at r/Homebrewingย ! ย ! ๐
Inkbird is going to give away the Inkbird PID Temp Controllerย & Inkbird Plastic Junction Boxย !!
โญ To enter, please upvote this post and comment below. ๐
I will randomly pick up two winners in the comments on June 1st. Both winners will receive an Inkbird PID Temp Controllerย & Inkbird Plastic Junction Boxย .
If you do not want to wait for the end of the contest. Here are 15% off promo codes for the Inkbird PID Temp Controllerย & [Inkbird Plastic Junction Box](https://www.amazon.com/Inkbird-Dustproof-Waterproof-Electrical-Enclosure/dp/B08TC3G6DB/ref=sr_1_51?dchild=1&keyw
... keep reading on reddit โกhttps://imgur.com/rqMp9p1 I have an application where I want to control the temperature of a water balloon by controlling a flow control valve, The water balloon has a temperature feedback and there's an exchanger near it, the water goes through the exchanger to get hot, and then through the valve to the water balloon, and then out of the water balloon to the exchanger again and so on and so forth.
What's the best controller type for this application ( PI ,PID,PD )? And what's the best approach for tuning ?
I'm using wago plc with codesys2.3 , there's no auto tuning in this software,
I'm doing a project for college, basically we have a cooler that is fixed at 50% DC and a heater that is controlled by the PID.
We tried the ZN approach first, but no matter how much we increased Kp the system would not oscilate (apart from the +/-0,5ยบ of the measurement error). Then we tried an open loop approach, we gave a step on the heater DC and found the transfer function on matlab, of course it's far from perfect but we got kinda close, the problem is that the system keeps oscilanting about +/-1,5ยบ from the setPoint and we simply can't make it stop, tried reducing the Kp, tried increasing the Kp, tried the same with Kd too but when the system is close to the 70ยบC limit the oscilations won't stop no matter how much we manually try to change the K values.
Maybe important to add we're using a DEMA to reduce the measurement erros, and an anti windup condition to make the Error sum not add when the heater is satured.
edit: thanks for the tips everyone, curve is looking fine now
Alright so i have a noob question:I have to design a PID Controller for this system
s + 18
------------------------------------
s^4 + 19 s^3 + 163 s^2 + 371 s + 226
the requirements are:
settling time <8s, Overshoot < 4%, steady state error for step response =0
The trouble is when I plotted the step response for uncompensated system on MATLAB, the settling time is already less than 8sec at Overshoot of 4 percent. so I don't understand, should I just skip the PD design part and directly make a PI controller or make a PD controller that makes the settling time even lower?
Finally got around to swapping the cheap PID controller in my Tabletop Hi-Temp 2200ยบF Burnout Furnace with an used Watlow PM6C1CJ-BAAAPWP bluetooth controller from eBay. I also swapped the fan for a 24v fan, so I could get rid of the factory installed (clearly hand modified wall wort) 12v power supply that was rattling around loose in the case. Once you set the sensor to a k type thermocouple and limit the PWM output to between 8% to say 15% depending on your safety tolerance, it's a champ.
https://preview.redd.it/yy7x5c8p1a871.jpg?width=2376&format=pjpg&auto=webp&s=c69b4a2518cf4042f9181f0946cc3c949e6c43e3
Hello , i have a working PID Controller under simulink that gives good results for my system i want to replace it by an ANFIS controller .
My problem is that i cannot train the anfis controller properly using PID DATA (error, error variation) as inputs and (pulse width ) as output , when i collected data from the PID controller for a desired input (Angle) for example 'pi/4' and use that data to train my ANFIS controller i can only obtain good results (not as good as PID results) for the same input (pi/4).
i tried collecting data for various inputs from 10 to 80 degrees (its quiet a lot of data for a simulation time of 20sec) I cant seem to get any results out of it ,I organize the data in 3 columns first is for 'error', second is for 'error' variation , third is for the output 'pulse width'. When stacking data for various inputs I put the simulation data from 1 input then 2nd input ...... one under the other in a table of 3 columns and 'n' lines .
this approach doesn't seem to give good results .I'd like to know where I could be wrong ,what misstep did make .
thank you for your answers
I have an Inkbird ITC-100V PID controller that has an alarm function to sound a buzzer once a set value is exceeded. Is it possible to hook it up to my ESP32 to send a notification over Wi-fi without using a breakout board, resistors or anything extra? I believe I can use any voltage through the alarm function as it seems to be a switch on the diagrams.
I searched for the answer using detect, read, sense, measure and probably other words but I donโt know if Iโm even using the right terms to find what Iโm looking for.
Any help would be appreciated.
Anybody tried one of these in something like a 700FB?
It's priced right and looks like the correct form factor. I don't mind no wifi, i have wifi probes.
So I'm doing a project for a hobby of mine (mycology), also I want to add to my "portfolio", so I have something to show for when searching for jobs when my studies are finished.
The chamber is attached to an intake which can get plain air, or humidified air and humidity sensors inside.
I've made a GUI where you can choose parameter values, like humidity.
I'm wondering if I can get good results, aka getting the chamber to stabilize on a set value of humidity with a simple if-statement, like this in the loop or will it just oscillate?
if(set_humidity > current_humidity)
turn_on_humidifier()
If it oscillates then I would want to use a PID controller or is there something better for this situation?
// ************ DEFINITIONS************
float kp = 0.02;
float ki = 0.00015 ;
float kd = 0;
unsigned long t;
unsigned long t_prev = 0;
const byte interruptPinA = 2;
const byte interruptPinB = 3;
volatile long EncoderCount = 0;
const byte PWMPin = 6;
const byte DirPin1 = 7;
const byte DirPin2 = 8;
int Pin13 = 13;
int NorthSouth = 0;
float x = -0.5;
volatile unsigned long count = 0;
unsigned long count_prev = 0;
float Theta, RPM, RPM_d;
float Theta_prev = 0;
int dt;
float RPM_max = 52;
#define pi 3.1416
float Vmax = 5;
float Vmin = -5;
float V = 0.1;
float e, e_prev = 0, inte, inte_prev = 0;
//**********FUNCTIONS******************
// Void ISR_EncoderA
// Void ISR_EncoderB
// Void Motor Driver Write
// Timer Interrupt
//*************************************
void ISR_EncoderA() {
bool PinB = digitalRead(interruptPinB);
bool PinA = digitalRead(interruptPinA);
if (PinB == LOW) {
if (PinA == HIGH) {
EncoderCount++;
}
else {
EncoderCount--;
}
}
else {
if (PinA == HIGH) {
EncoderCount--;
}
else {
EncoderCount++;
}
}
}
void ISR_EncoderB() {
bool PinB = digitalRead(interruptPinA);
bool PinA = digitalRead(interruptPinB);
if (PinA == LOW) {
if (PinB == HIGH) {
EncoderCount--;
}
else {
EncoderCount++;
}
}
else {
if (PinB == HIGH) {
EncoderCount++;
}
else {
EncoderCount--;
}
}
}
//***Motor Driver Functions*****
void WriteDriverVoltage(float V, float Vmax) {
NorthSouth = digitalRead(Pin13);
int PWMval = int(255 * abs(V) / Vmax);
if (PWMval > 255) {
PWMval = 255;
}
if (NorthSouth == HIGH) {
digitalWrite(DirPin1, HIGH);
digitalWrite(DirPin2, LOW);
}
else if (NorthSouth == LOW) {
digitalWrite(DirPin1, LOW);
digitalWrite(DirPin2, HIGH);
}
else {
digitalWrite(DirPin1, LOW);
digitalWrite(DirPin2, LOW);
}
analogWrite(PWMPin, PWMval);
}
void setup() {
Serial.begin(9600);
pinMode(interruptPinA, INPUT_PULLUP);
pinMode(interruptPinB, INPUT_PULLUP);
attachInterrupt(digitalPinToInterrupt(interruptPinA), ISR_EncoderA, CHANGE);
attachInterrupt(digitalPinToInterrupt(interruptPinB), ISR_EncoderB, CHANGE);
pinMode(DirPin1, OUTPUT);
pinMode(DirPin2, OUTPUT);
pinMode(Pin13, INPUT);
cli();
TCCR1A = 0;
TCCR1B = 0;
TCNT1 = 0;
OCR1A = 12499; //Pre
... keep reading on reddit โกI just got a few 8bitdo controllers to use with my MiSTer, and I noticed that they all share the same VID/PID when in wired USB mode, which throws the button mapping all out of whack across different controller types (as the MiSTer assumes they are all the same controller). Is there a way to change this? Has anyone even had this problem here?
Whoโs using a PID controller on your stills. I used one for the second time recently. My first time I had the thermocouple in the pot and seemed to be able to regulate the temperature efficiently. The temperature swing around each of my temperature points was probably less than +/- 2 degrees. The second time I tried running it at the top of the column. There I had anywhere from +/- 10 degrees to +/- 5 degrees. It ran much slower this time around as well as the flow would almost stop as the temp dropped and then itโs flow as the temp came back. Any suggestions and helpful tips would be awesome.
I'm curious to know if any Pro 1100/820 owners have managed to get their hands on one of the new PID controllers from the 1150 and retro-fit to their smokers?
Wondering if someone would be willing to point me in the right direction for creating a PID controller for an Arduino-controlled DC motor setup.
All the theory I learned in school just has me dealing with transfer functions, and I know I can take the system dynamics and take the Laplace transform.
However, the main problem is that the dynamics use force F (cart pole system), while the signal that is sent to the motors is simply an integer that determines motor RPM. How can I address what must be an extremely common issue?
Hey guys,
I am new to control theory, I have a stupid question, when do we use/not use PID (or PI or PD) controllers and when do we use H2/Hinf controls?
I realize that PID based controllers are not optimal, just want some theory and example cases where to use which.
Thanks for the help guys.
I have a dynamics model of a vehicle and I am trying to use PID control on the steering, thus I am trying to tune the controller but cannot for the life of me seem to get it to oscillate
This is the project i'm working on and i'm struggling to understand one sentence which is stopping me from progressing the project.
https://preview.redd.it/roqa1p3xuey61.png?width=689&format=png&auto=webp&s=9eb37b1b3b806fb174e68382b623483460629a29
https://preview.redd.it/mw52b5r0vey61.png?width=716&format=png&auto=webp&s=0e9f4f7e9473d66fae961ac2e0d6dc0f5efa8b11
I'm struggling to understand what it means when it says to add +/- 80% step changes in Qh to represent process disturbances.
Hi all,
I took controls classes but I was never taught PID controllers properly unfortunately. And whenever I try to look it up I get confused.
Can someone please explain how each P, I, and D work in a simplistic way and how they work together?
Thanks!
I am making a line following robot using Altera Cyclone IV FPGA , DE0-Nano. I have interfaced a line sensor and motors and have basically have build the bot. Now, the bot is moving by keeping track of a black line but the output is very unstable. I want to implement a PID control to the system to make it more stable. I tried searching a bit here and there but couldn't find any good leads to program the PID control. I'm using Verilog as the language for coding the FPGA. Please help...
So I'm doing a project for a hobby of mine (mycology), also I want to add to my "portfolio", so I have something to show for when searching for jobs when my studies are finished.
The chamber is attached to an intake which can get plain air, or humidified air and humidity sensors inside.I've made a GUI where you can choose parameter values, like humidity.
I'm wondering if I can get good results, aka getting the chamber to stabilize on a set value of humidity with a simple if-statement, like this in the loop or will it just oscillate?
**if(set_humidity > current_humidity)**turn_on_humidifier()
If it oscillates then I would want to use a PID controller or is there something better for this situation?Sorry if stupid question, have not had any control theory in school.
edit: might add that the humidifier has a binary output, you cannot crank it to output more vapour, it's either on or off. The fan is controlled with a MOSFET so you can get PWM functionality.
Therefore the PID will not make it reach the set humidity faster with gain, so that pro of a PID controller is not there, if I understand correctly.
