PID control

398

05:17:18

PID with operational amplifiers, here it's not possible to simulate de mechanical coupling between the potenciometer and the motor, but the idea is making a functional circuit for the simulation. Any ideas will be received! 

published 5 years ago

Bushmills

5 years ago

Possibly, adding a small resistor between motor and feed, as current probe, then change load level of motor to simulate input, as in http://everycircuit.com/circuit/6638221898022912

hurz

5 years ago

But a PID controler is not just a chain of multiplying OpAmp with its different gain. This would just result in a P rehulator. I and D is totaly missing. Sure as long motors do not return something like speed or position, motors are useless. You have to be creative and model a little circuit e.g. low pass first order to emulate this. Or for a position of a roboter arm you could use an integrator to emulate a sensor. But you need to emulate as long there are no sensors available wirhin EC. Sorry.

Bushmills

5 years ago

Or, use a scope trace for motor emulation. Level representing motor position, input conveniently provided as voltage already.

hurz

5 years ago

@bush, this is to make it visible, but what a regulator needs is a parameter to control on, so it must be something which could be read back. The voltage at the motor is not the position of a robot arm.

Bushmills

5 years ago

Hurz, position can be simulated. How much sophistication such a simulation needs is up to the implementer - possible even a simple RC filter can reflect some characteristics of a motor, approaching its destined position.

hurz

5 years ago

thats what i have said already, but its a very bad way to get help, better would be an extra e.g integrating element coupled with the motor for a clean move left and stop and turn back. Now we use RC in simple case and make tau extreme high to stay linear and have to transform voltage into a distance. There are so many useful components im missing 😭

Bushmills

5 years ago

Correct, but it won't help the tiniest bit to ponder what we can't use because we ain't got it. Instead, we rather try to do with what we have.

hurz

5 years ago

or we leave it, cuz EveryCircuit MuseMaze dont want us todo?!

Bushmills

5 years ago

Or that.

Bushmills

5 years ago

Here is btw, a thread close to fading into oblivion, presumably a sort of wishlist: http://everycircuit.com/circuit/6108778365714432

hurz

5 years ago

thats the oldest link for this topic exist. There were newer ones and this + Icon was the latest in componente list.

hurz

5 years ago

dont use any threads, use only + for your wishes, this was the last msg i remember

Bushmills

5 years ago

One can paste the wishlist URL into the + dialog. Typing the request directly there is like throwing it into a black hole.

kiani

5 years ago

Hey how did you di a yellow resistor !! The pricip of PID can be done on EC. A full blown with feedback from motor and a position sensor, is just too ambitious for any simulator..

hurz

5 years ago

easy, highlight by click on it and store. But all this with the google chrome browser version. In Mobile App impossible

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