Questions tagged [control-system]
A control system regulates the behavior of other devices or systems, usually using a control loop. Examples are a home heating controller using a thermostat, a regulator keeping a drone stable, and industrial control systems used for controlling processes or machines.
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Measuring BLDC Motor Speed with Angle Feedback
I am trying to implement FoC for a BLDC motor. I have a dedicated control board(STM32H7) that receives current and angle feedback, but I'm having trouble figuring out how to measure the speed from the ...
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Disturbance error transfer function
I was trying to solve some examples from the book Feedback Control of Dynamic Systems by Franklin, Powell & Emami-Naemi. (Seventh Edition, Pages 195 & 204) about PID controllers. The problem ...
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BIBO stability and Asymptotic stability
I have difficulty solving these two exercises:
Exercise 1
Consider the system described by the transfer function
$$ P(s)=(s-1)/(s+1)^2 $$
Design a controller so that the feedback controlled system is ...
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Design a controller using root locus technique
Given the system described by the transfer function
$$P(s)=10/(s^2 +1)$$
Design a controller using root locus technique so that:
The closed loop system is of first type and $$|e_1|<=0.01$$
The ...
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Help decoding weird Id current behavior at high motor speeds!
I have implemented a motor controller which employs FOC to control the speed of a PMSM motor, similar to this:
Normally Id reference (IDref) is set to 0 and only the Iq reference (IQref) (quadrature ...
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What signal to use for identifying control-to-output TF of resonant converter? Is it required to have a transfer function when PI tuner is present?
I have a resonant converter (DC-AC) built on Simulink and I want to find out its control to output (current) transfer function using the system Identification toolbox in MATLAB/Simulink. I have three ...
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In this transfer function equation, is "20" inside the log() the value that was factored out?
In the given problem, we're supposed to find the gain of the transfer function. The solution provides an equation to the problem. The question I have is, for that particular equation, is the value ...
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Using Integral of Error as Input in Fuzzy Logic Controllers
I'm currently working on a control system for a doubly fed induction generator (DFIG) as part of my thesis project. Traditionally, fuzzy logic controllers (FLCs) use the error (e) and the derivative ...
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How to calculate Rslope for MAX25611
There isn't much information for calculating Rslope. THe only equation that includes Rslope is Vslope, which is being differentiated. Unsure how to approach this, as I seem to require it for my ...
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Why is inverse of a transfer function not really a correct way to think while doing circuit analysis?
When we try to predict the circuit behaviour using transfer function, everything works fine in forward direction (Vin to Vout).
But if we try to predict the circuit behaviour in reverse direction (...
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How does "pass band" relate to the response speed of a digital controller?
I am reading the page 318 of "Digital Control Systems: Identification, Design and Implementation" by I. D. Landau and G. Zito, which talks about the choice of desired performances in digital ...
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Routh criterion for stability
I am doing exercises in which using Routh's table I find the sign of the poles of a function and then determine its stability.
For example, studying s^3-4s^2+s+6=0 with Routh's table you find two ...
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First order system transfer function
Suppose we have the transfer function written in the picture. The circuit from which this transfer function was derived is a classic RC circuit with an Rload (Rload parallel to the capacitor).
I have ...
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Analog Compensator Vs digital Compensator in Power electronics Converter
I was working on designing a feedback compensator for my buck converter. I decided to use the compensator circuit in the feedback and give its output to Arduino which gives the duty cycle as shown ...
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How to get Transfer Function from R to Y?
How to get Transfer Function from R to Y?
I can group G2 and G3 up by doing G2/1+G2G3 Correct? Dont really know what to do from there
