- #1
Design a Voltage Feedback Loop w/ PID Controller
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Discussion Overview
The discussion revolves around the design of a voltage feedback loop incorporating a PID controller. Participants are exploring the placement of the PID controller in relation to a pulse generator, focusing on how to effectively control the pulse width to achieve the desired voltage output.
Discussion Character
- Technical explanation, Conceptual clarification, Debate/contested
Main Points Raised
- One participant suggests placing the PID controller between the measured voltage (VC) and the pulse generator, indicating that the difference between measured and desired VC represents the error that the PID function will control.
- Another participant proposes connecting the top of the PID controller to the left side of the pulse generator to control the input rather than the output, emphasizing the need for clear arrowheads to indicate input and output directions.
- A later reply points out that having two PID controllers in the diagram is unnecessary and suggests removing the first one to simplify the design.
- Participants discuss the importance of feedback control, highlighting the process of continual measurement, comparison, and adjustment to maintain the correct average voltage at VC.
Areas of Agreement / Disagreement
Participants express differing views on the correct placement of the PID controller and the representation in the diagram. There is no consensus on a single correct configuration, as suggestions and corrections are made throughout the discussion.
Contextual Notes
There are unresolved aspects regarding the specific configurations of the PID controller and pulse generator, as well as the implications of the proposed changes to the diagram. The discussion reflects varying interpretations of how feedback control should be represented.
Who May Find This Useful
Individuals interested in control systems design, particularly those focusing on PID controllers and voltage feedback loops, may find this discussion relevant.
- #2
jim hardy
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Between line VC and the pulse generator.
Difference between measured and desired VC is error , function PID(error) controls pulse width.
Difference between measured and desired VC is error , function PID(error) controls pulse width.
- #3
- #4
jim hardy
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I'd connect top of PID to left side of pulse generator, to represent controlling pulse generator's input, instead of where you have it which is its output .
And i'd add arrowheads to PID so it's intuitive that bottom is PID input and top is output.
Likewise add arrowheads to pulse generator.
The point is you let PID control the pulse width to make correct average voltage over at VC.. That's the basis of feedback control - continually measure , compare, adjust.
And i'd add arrowheads to PID so it's intuitive that bottom is PID input and top is output.
Likewise add arrowheads to pulse generator.
The point is you let PID control the pulse width to make correct average voltage over at VC.. That's the basis of feedback control - continually measure , compare, adjust.
- #5
- #6
jim hardy
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Kasim said:
Your most recent addition looks right , but now you have two PID's.
Erase that first one you drew and it could work.
- #7
Kasim
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Yeah was just a rough sketch.. Thanks a lot
- #8
jim hardy
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Good luck!
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