Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [control]

Control refers to systems that control other systems, whether that be industrial machinery, lighting, or devices used in a home.

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Poles and Zeros in English

Can someone explain, or provide a good reference to an explanation of Poles and Zeros for say, a power supply compensator, or any control system for that matter. I'm not really looking for a mathematical explanation, as that seems rather straight…
bt2
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How do I find the second order transfer function from this step response diagram?

I have the following diagram of a system's step response: I'm having trouble understanding how to calculate the system's transfer function, given this diagram. Specifically, I don't understand how exactly I can calculate the natural frequency and…
T. C.
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Can anyone point me in the right direction to solve this control systems problem?

The problem is the one at the top of the page. I was able to reduce the first block diagram into the feedback loop block and I got H(s) = 4s + 1 using the identities in the book. I've spent hours playing with the 5 identities to try and reduce it to…
Pwestm
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Poles and Zeros in Second Order System

I was reading about second order systems and forced/natural responses: I just want to explain my understanding of what generates the forced and natural responses and want to ask if it is correct: The input poles of the input function decide the…
jaurunjljgrtutkwcy
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Differences between Linear and Non Linear WECS models

I'm modelling a wind turbine and PMSG with uncontrolled rectifier and buck converter. I am currently trying to design a current controller for the current Iq coming from the generator. To do so, i linearized the entire system. I previously attempted…
mark roche
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How do i control a pressure?

I am looking for a component which can help me controlling the pressure in a tube. I explain : I have a compressor which blow some air in a tube. The compressor blow up to 8 bar and the tube is really small. I need a pressure between 1.5 and 2 bar…
damien
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Hysteresis control disadvantages?

This article gives 2 main disadvantages: Variable frequency Requires ESR on the output cap Is variable frequency a big of a deal? Why would synchronization matters for a converter? And why are high ESR necessary for it to work? What I'm missing…
MdxBhmt
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Larger phase margin means less overshoot?

Why is it that the larger phase margin means the system has less overshoot? I have heard that the larger phase margin means greater damping, but I don't how they are connected to each other. Could someone give a physical example that would show…
T L
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Differential equation to state space representation

Suppose I have a dynamic system in the form: $$ a \, \dot{x}_1 + b \, \dot{x}_2 + c \,x_1 + d \, x_2 + e = u_1 \\ f \, \dot{x}_1 + g \, \dot{x}_2 + h \,x_1 + i \,x_2 + j = u_2 $$ How would I transform this system into a state space representation? I…
james_erikson
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Controllability/Observability in Controller/Observer form

I understand that a necessary and sufficient condition for controllability is that no single pole of the system is cancelled by a zero in all of the elements of the transfer-function matrix. And the same goes for observability. However, if I express…
db18
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Effect of zero order hold on gain and phase margin in continuous analysis.

I heard a rule of thumb this morning indicating that modeling a discreet system as continuous using a second order padé approximation for the zero order hold will result in a 2Db loss of gain margin, and a 7° loss of phase margin, provided the…
2NinerRomeo
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Determine the robustness of a controller

How do I determine whether a PID controller I've designed is stable? How do I determine its stability due to the transfer function it's being applied to, and how well it rejects disturbance and noise?
Carlton Banks
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System transfer function is defined with zero initial conditions - how does it have a natural response?

This shows that a system transfer function assumes zero initial conditions. By the definition of the natural response - I know that it is due to initial conditions of the system. So, how can the author here say that the natural response is due to…
AlfroJang80
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Set Kd too high

In a control system, why when I set Kd (differentiate) too high then it has a buzzling sound? Is it because of the system is moving up and down very fast?
Dzung Nguyen
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LTI Systems - Step input giving both forced and natural response

I was reading this book and saw this: They apply a step input R(s) to a system G(s). Now, they say that the input pole of R(s) at the origin generated a forced response of 1 in Equation 4.6. And the system pole generates the natural response which…
jaurunjljgrtutkwcy
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