Signal Processing Stack Exchange
Signal Processing Stack Exchange

Questions tagged [control-systems]

301 questions
13
votes
6 answers

Relation between signal processing and control systems engineering?

Control systems engineering and Digital signal processing are both important courses/subjects of electrical engineering But how these two subjects/courses are related to each other?? Also please kindly let me know,what are some recommended resources…
DSP_CS
  • 1,910
  • 2
  • 29
  • 65
6
votes
3 answers

Why is an RC circuit a first order system?

I am going through the following tutorial: Time-Response Identification of a Resistor–Capacitor (RC) Circuit Why do we call the RC circuit a first order system? I understand the order of a system is based on the highest derivative involved in its…
JJT
  • 215
  • 2
  • 7
4
votes
1 answer

How to evaluate a close-loop control during transient?

I have implement a close-loop control in order to perform the tracking of the desired signal R. The basic scenario shall be summarized as follow: I have to evaluate the performance of my control G with a moving average value of the Error E. When…
Mattia S.
  • 51
  • 3
3
votes
1 answer

How do you design using bode plots?

[Control Systems Engineering by Nise] Hey, I have some confusion regarding bode plots and how they can be used to display both open loop and closed loop information. This also partially relates to my understanding of open loop and closed loop…
AlfroJang80
  • 303
  • 1
  • 8
3
votes
1 answer

Designing a Transfer Function with given requirements

While reading about the root locus method, I thought of a question and couldn't seem to answer it. Suppose for a negative feedback system, all the open-loop poles and zeroes and the centroid $\big(\frac{\sum{p_i}-\sum{z_i}}{n-m}\big)$ lie in the LHP…
LM2357
  • 103
  • 7
3
votes
3 answers

Why oscillations in PI control?

When integral control is added to proportional controller (i.e. PI control), why steady state error becomes 0 and why oscillations appear , how actually the integrator works ?
Talha Yousuf
  • 133
  • 1
  • 1
  • 3
2
votes
1 answer

Tuning Active Power Factor Correction converter works in Simulink, but having trouble achieving the same in DPS

I am trying to tune the Active PF Correction converter current and voltage loop to get a sinusoidal input current. I can get to a voltage reference, but the current looks like this. Reading the literature, the advantage of using APRC is that the…
mikebuba
  • 61
  • 1
  • 5
2
votes
2 answers

Regulating a reservoir for smooth output flow while avoiding under/overflow

Say that you have a reservoir of fixed capacity, $V_{max} [m^3]$ and some level of fill $V [m^3]$. Liquid is flowing in a stochastic, but observable rate: $$x(t) [m^3\cdot s^{-1}]$$ You are given a valve that can drain the pool at any rate: $$y(t)…
Knut Inge
  • 3,384
  • 1
  • 8
  • 13
2
votes
1 answer

State Space Observer Control

I am attempting to implement observer based state feedback in C and can't figure it out. Here is pseudocode of the algorithm: //Initialize Stuff loop: //read process variable …
Cosmo Kramer
  • 21
  • 1
  • 3
2
votes
2 answers

cancellation controller transfer function design

This chapter offers a free overview on cancellation controllers. However, i did not get equation (6.4), how the transfer function of $G_R$ is determined?
sunxd
  • 141
  • 2
2
votes
1 answer

Why do we use "error quaternions" for control of attitude?

I'm working on an attitude control system in terms of quaternions, and i'm basing my approach on the book Space Vehicle Dynamics and Control (2nd ed.). If we consider a proportionate controller, i.e. $$\mathbf{u} = -\mathbf{K}_p \mathbf{q}_e $$ it…
Thomas Wagenaar
  • 151
  • 5
2
votes
2 answers

Where does the error come from in PID control?

Let's say my thermostat is 50 degrees Fahrenheit. I know that 1000 units of kinetic energy are needed to raise the temperature from 80 degrees Fahrenheit. So I calculate how much I need to increase my furnace to produce 1000 units of kinetic energy,…
user3180
  • 121
  • 2
2
votes
1 answer

Doubt on the relationship between the sensitivity and the complementary sensitivity function

I am doing loop shaping with the following transfer functions: G = 10/((s+10)*(s+1)); K1 = 0.5/s; where G is the process and K1 is the controller, and If I increase the badwidth of the seisitivity function in this way: I have that also the…
J.D.
  • 183
  • 10
2
votes
1 answer

Controllable realisation of $\frac{s^4+1}{4s^4+2s^3+2s+1}$ is both controllable and observable?

I am trying to find the controllable realization of the following transfer function: $$H(s)=\frac{s^4+1}{4s^4+2s^3+2s+1}$$ I approach this by first using polynomial division to assure that $H(s)$ is strictly proper. This…
john melon
  • 123
  • 3
1
vote
0 answers

derivating input output relationship of a block diagram when there is noise added to the output

For the following system, I am not quite sure how the equation representing the input output relation is derived. Here, r is an input reference signal, $d_e$ is external disturbance and $n$ is noise. What I can write is $G[K(-Hy + Fr)+G_dd_e]+n =…
sunxd
  • 141
  • 2
1
2 3