# control systems

1. ### Transfer Function and Control Systems Question

ıs there anyone to solve 8th 9th and 10th problems? It is about transfer function and control systems http://avesis.yildiz.edu.tr/DokumanYetki.aspx?SSNO=33&USER=2813 Password= 1234
2. ### Dynamic modeling of a system and transients of the system

Consider, I have a dynamic system model for air compressor. Which means I have modelled the system by including its physics. Does this means I also included the transients of the system? What I think is, when i modelled any system with equations, I think that includes the transients. Is it...
3. ### Viscous drag parallel to the axis of rotation: Control Systems

1. Homework Statement https://i.imgur.com/WPAKuf4.png seeking G(s) = \frac{\theta_2(s)}{\tau(s)} 2. Homework Equations 3. The Attempt at a Solution What does it mean when the viscous drag is parallel to the axis of rotation? It also turns out that this system needs two equations. I...
4. ### Control systems -- input with non-zero initial conditions

1. Homework Statement Deriving an s-domain equation for the following inputs a) &b) 3. The Attempt at a Solution I understand how to derive the equation for an input with zero initial conditions (part a) but I'm not sure what to do when there are non-zero initial conditions (part b)
5. ### A block diagram reduction

I would like to ask why cannot I think G5 in series with G3(G4+G6G7) and then after muliplying them why I cannot think of G5*G3(G4+G6G7) in parallel to G2 so sum G2 and G5*G3(G4+G6G7) ? Thank you.
6. ### Just curious, searching for explanations or research

Outdated Control Systems Engineer with a PhD in Industrial Preventive Maintenance, in training for a double major in Chemistry and Biology. Prefer to work the math, reason and deduct, infer, interpolate and extrapolate, yet a lot is presented to me as to be "simple memorization", so I have to...
7. ### Control theory: block diagram, problem (detailed below)

I´m taking a course on control engineering and I have a test next Tuesday so I need to study the basics which are: Laplace transform, simplification of block diagrams, and analysis of transient and steady state responses. Right now I am dealing with the second one. I know the basic rules of...
8. ### Finding points on root-locus by hand

1. Homework Statement I am trying to answer two questions: 1. Solve part (b) in the image above by hand. 2. What are the differences between transfer function (a) and transfer function (b). 2. Homework Equations cos(Im(s) / Re(s)) = ζ 3. The Attempt at a Solution 1. For part one...
9. ### Dynamic model of non-linear system

i am finding it difficult to get insight about modelling of non linear system (electrical). my queries are, consider the system is DC DC converter... 1) I read that to study the dynamics of the system we linearise the non-linear system....why do we want to linearise it?... 2)can some one please...
10. ### Hello Everyone!

Hello, My name is Emre and I am a MSc student in mechanical engineering.I am looking for PhD in US.My research interests are mechanical vibrations,rail vehicles,finite element method and control theory.In fact I have 2.68/4 GPA in Undergrad and 3.79/4 GPA in Master.So if anyone has any advice...
11. ### 2nd Order Control system PD controller

Hi, This question on PD control is from a practice quiz. 1. Homework Statement If you can't see it- the question asks to find values for Kp and Kd such that the system achieves 5% OS and has a settling time Ts of 3s. Cs = 3 Cd = 2 m = 5 2. Homework Equations ω_n^2/(s^2 + 2ζw_n + ω_n^2) -...
12. ### Why Time Response Characteristics Derived from Zero State Equation

QUESTION: 1) Why are Time Response Characteristic's Expressions derived from only from Zero State Equations? NOTE: Nise Control Systems Engineering 6ed uses step inputs to derive Time Response Characteristics for 1st and 2nd order ordinary differential equations...
13. ### Auto track using Kinematic model

Hi, I'm trying to implement an auto track guidance system for ground vehicles (Eg Tractors), I'm using Matlab and Simulink. I'm at a point where I can calculate heading errors. I'm not too sure how to calculate the lateral errors. Also, I need help in designing the controller. I'm using...
14. ### Observable System L Matrix, can a value be negative?

1. Homework Statement An error matrix is in the form, has a characteristic equation: $CE: s^2 + 120s + 7200 = 0$ A state variable feedback system is described by: $A_F = \begin{bmatrix}0 & 1 \\-616.8 & -40 \end{bmatrix}$ $B = \begin{bmatrix}0 \\ 1 \end{bmatrix}$ ## C =...
15. ### How can I control two outputs with a single PID-controller?

Overview I'm trying to levitate a constrained permanent magnet with 2 electromagnets. I'm having trouble conceptualizing the control system for such an operation. Setup The permanent magnet is fixed onto a horizontal pendulum and is repelled by an electromagnet above and repelled by an...
16. ### Transfer function with Disturbance

1. Homework Statement Find the steady-state error due to a disturbance Td(s) = 1/s. Set R(s) = 0. if given a system: 2. Homework Equations n/a 3. The Attempt at a Solution I need Y(s)/Td(s). To do this I must find Y(s) in terms of the transfer function Y(s)/R(s) which I have obtained...
17. ### Understanding frequency and dynamics

Can someone please explain intuitively how the terms “frequency” and “dynamics” are related ? I understand the concept of each of these two individually, but I am having some difficulty visualizing what high-frequency dynamics mean. I understand the concept of how time and frequency domains...
18. ### Why the transfer function is represented in S Domain?

Hi all, I would like to know why the Transfre function of the system is represented in S Domain instead of doing all the math in time domain itself. I studied a course on control systems and i wonder why s- domain is taken instead of other domains like Z- domain and others. Please refer belwo...
19. ### Calculating Steady State Error

I am trying to calculate the steady state error of the following system but unable to do it. I have used MATLAB and calculated the steady state error to be 0.1128 but don't understand the steps that I need to do to calculate this. Please help. Thanks