Questions tagged [transfer-function]
The transfer G(s) = X(s) / W(s) function describes the relationship between an input signal X(s) and an output signal W(s).
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Effect of pair of complex zeros on system response
Talking about continuous system transfer functions (so s-domain), a lot of resources are available to estimate the effect of one real zero on the system response.
However, I did not find anywhere a ...
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How to observe open loop characteristics with loading conditions?
I have derived transfer function of a dc motor (armature controlled). Its input is armature voltage and output is speed of motor in rad/s. How do I observe open loop characteristics with an external ...
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Clamp function transfer function
I feel like this should be simpler than I'm finding it, but here goes. I need a transfer function for the function y(t)=u(t)H(u(t)-m)(1-H(u(t)-M)). This is the ...
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Transfer function, steady state
In a problem I came across I was asked to determine the parameters M2 and k12 such that mass M1 does not vibrate in steady state. The diagram can be seen below
I found the transfer function to be
Y1(...
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Find transfer function of a drive pulley where the output is a spring force
I have the following system
and have deduced the equations of motion to be
and with the substitutions for the spring forces we get
I understand how to find the transfer function of any single ...
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Drawing Block diagram of Transfer Function with multi input variables
I was solving a Transfer function problem with multiple input variables. I decided to draw a simplified block diagram of the function but I cannot find any resources that point me to this specific ...
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How to convert PI controller in to differential equation?
I want to convert PI controller into Differential Equation form. How should I do this? Please help me.
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Constructing a block diagram from equations
\begin{equation} X(s) = -A X(s) + Z(s) +B W(s)\end{equation}
\begin{equation}W(s)= C X(s) -D W(s)\end{equation}
\begin{equation} Y(s)= E W(s)\end{equation}
My question is would the system be ...
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Controlling a system in a particular direction
In Discrete-time Control Engineering by Katsuhiko Ogata, it is stated that "A necessary and sufficient condition for complete state controllability is that no cancellation occurs in the pulse ...
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How to get difference equation from this block diagram
I was posed a very similiar block diagram in my exam from this book (Alan V Oppenheim Ronald W Schafer - Discrete-Time Signal Processing-Pearson Education) but couldn't solve it:
I want to solve for
...
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Calculating the transfer function of this block diagram
I'm not really sure what steps to take to solve the problem. I tried with G4 and G2 first but I'm not sure if that is the correct way.
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How can I find characteristic equation of complex systems?
I am working on an Overhead crane, where I am supposed to design a controller that controls the position of the crane while minimizing the load's sway angle. I have derived the transfer functions for ...
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Steady state error of negative feedback system - zeroes of feedback function
I am currently studying control systems from the KUO - GOLNARAGHI book. Regarding the steady state error the book makes the following distinction:
Feedback function H(s) has no zero at s = 0
Feedback ...
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How do I find the minimum/maximum stable value of scalar gain for a closed loop transfer function?
I have the following transfer function:
$$G(s) = \frac{s + 8}{s^2 − 2s − 3}$$
This function is placed in series with a static gain $k$ and unity feedback. In this case I'm looking for the minimum ...
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How do you generate an impulse signal in a mechatronic system?
Background:
I have a piezoelectric force transducer that I am using to measure the force produced by a combustion reaction in a tube. The issue is that there is a lot of ringing that occurs during the ...
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Tranfer function of non-self regulating process
This system is non-self regulating process with mathematical model :
dh/dt = (fi-fo)/C
where
fi = flow input,
fo = flow output,
C = tank capacity or volume tank.
I want make tranfer function of this ...
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Mathematical model of an hydraulic jack
How to find a mathematical model of this hydraulic jack system?
I'm confused about the part when the piston extender, check valve 1 opens and check valve 2 closes, then liquid from the bottom tank ...
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Transfer Function for Electro-Mechanical System
Can anyone please lead me in the right direction as to how to solve for the transfer function given this motor schematic
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How to determine the dynamic response of a spring-mass system?
The Problem
I have the following system for which I would like to determine its dynamic response, taken from these lecture notes pg.20:
where the forcing functions are $u_1 = 1-U(t - t_0)$, $u_2=0$, ...
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Servo Motor Input Voltage Equation
I'm working on a Ball & Beam project. As I'm doing it for an engineering project, I'm supposed to model the system mathematically, calculate the PID parameters, etc. to center the ball in the ...
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Modelling of Ball and Beam System
I'm trying to model a basic ball and beam system using Euler-Lagrange Equation. My system looks something like this
I have come up with this final Euler-Lagrange Equation:
Where JB is the ball's ...
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How can I find the Transfer Function in Z-domain?
This is my signal;
$y[n]=x[n]+0.8x[n-0.2]$
When I take Z-transform I get;
$Y[z]=X[z]+0.8z^\frac{-1}{5}X[z])$
Then I found the Transfer function as;
$H[z]=\frac{Y[z]}{X[z]}$
$H[z]=1+0.8z^\frac{-1}{5}$
...
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Fault Recovery of a UAV using MATLAB
I'm currently investigating fault recovery in a UAV using MATLAB.
I've been given several variables:
phi = the roll angle
psi = the yaw/heading angle
beta = the side slip
p = roll rate
r = yaw/...
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How do I interpret the following Bode, Nyquist and Nichols diagrams?
I am working with an arbitrarily complicated and long-winded transfer function that looks something like this:
$$
H(s) = \frac{as^4+\cdots+b}{cs^6+\cdots+ds^2}
$$
where letters represent constants. ...
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Z - transform of white noise
I am taking a graduate course in Digital signal processing with no prior knowledge in DSP. So I am struggling because I don't have the foundational knowledge. Please I need help with the following.
...
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How to model this real-world system to define transfer function for stability?
The system shown is an off-axis drive system that rotates the platform to 60° via a substantially-sized NEMA 34 stepper motor. The axial force required by the stepper/ballscrew assembly has already ...
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Transfer Function
Hi Guys I am trying to evaluate the following transfer function below can anyone verify if this is correct
$$e_i = -d_{r,i} + d_i $$
$$d_i = q_{i-1}-q_i$$
$$d_{r,i} =H_iq_i$$
$$Therefore, e_i = -...
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Closed Loop transfer Function
Hi Guys wanted some help for breaking down a block diagram which can be seen below. I know that typically with feedback systems be it negative or positive you would employ using the following:-
Close ...
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How could we calculate the coefficient of a PI controller (ki - kp) which regulates the voltage of the DC bus link of a three-phase inverter?
From my calculations I arrived at a non-linear equation :
$$ C\frac{dV_{dc}}{dt} = 3e_q\frac{I_q}{2}V_{dc} - \frac{V_{dc}}{R_{dc}} $$
I have calculated the operating points which are $I_q = 9.58A$, $...
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Determine the transfer function of a movement equation
The problem is the following. I have to control a spaceship (assuming no gravity, no mass, no friction / no external forces). In other words, the first equation in this question leads to $0 = 0$. My ...
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What is the output of a signal in time domain that passed through a High Pass Filter with simple transfer function
If a signal function $ U(t) = 25 – (5 – t)^2$ is passed through a high pass filter with transfer function $\frac{s}{s + ω}$. what is the output signal Y(t). I know that the transfer function $H(s) = \...
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Evaluating Steady State Error Constant for a Discrete Time Control System with Kronecker Delta Input
Hello there, hope you are doing well.
I am working on a Discrete Time Control Systems homework and at a certain part of it, the question asks me to find the steady state error of the system. I ...
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How to model a double transfer function in Simulink?
I'm trying to model an actuator in Simulink based transfer functions previously derived.
One of functions is $$\omega_p=G_2(K_cG_1V_c-c)$$ where $$G_1=\frac{K_e}{\tau_es+1}$$ $$G_2=\frac{1}{c+...
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Feedback loop and zero - error in steady state
I need help with this exercise. I 've tried many times with pen and paper but I'm stuck. I don't want a full answer but some feedback .
Here is my progess:
$$\frac{dx}{dt} = Ax(t) + Bu(t) \Rightarrow ...
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How can I get final value of $V_{out}$ at $t=∞$ in RC circuit?
I can obtain the transfer function in this RC circuit.
$$ \frac{V_{out}}{V_{in}} = \frac{1}{(RCs+1)} $$
When $V_{in}$ is set to $10V$, how can I get final value of $V_{out}$ at $t=∞$?
I tried to use ...
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How to calculate the open-loop transfer function with disturbance at the input of the plant
I have the system as follows:
I am trying to find the transfer function:
$$ T(s) = \frac{Y(s)}{U(s)}$$
where $Y(s)$ is the output and $U(s)$ is the input of the plant.
The plant is $H(s)$.
I have got ...
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How to get a transfer function from this block diagram?
Pardon my paint skills, I did my best
My attempt is short and seems to fail, I have no idea why:
$$\begin{align}
\alpha &= in - a_{1}\beta - a_{2}\gamma \\
\beta &= \alpha z^{-1} \\
\gamma &...
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Did I get the correct result? Block reduction problem
After solving I got
$$T(s) = \frac{s^{2}+3s+3}{(s+1)(s+2)}$$
and for the stability of the system I got:
$$ s_1 = -1 $$
$$ s_2 = -2 $$
So, is the system stable?
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Phase shift of transfer function using MATLAB
I'm trying to compute the phase shift of a transfer function (accelerance) in MATLAB, but I'm having issues.
The transfer function was computed by dividing the magnitude of the system output by the ...
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Block reduction need someone to check my work
I tried to solve this block but I am not sure if the end result is any good, some feedback would be nice.
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Getting the damping ratio from a frequency response function v.s. transfer function
I'm trying to find the damping values of a specimen, based on sweeping the forcing frequency from 0-10 kHz. As shown in the diagram, I measure the input force from the shaker, and the subsequent ...
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mass-friction-spring system with closed loop
My professor told us that it is possible to see the friction in a mass-friction-spring as the contribution of a closed loop control system. He wrote the following formulas:
Transfer function:
$$G(S)=\...
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second order linear filter and coefficients sign
Courses on automatics define usually the second order transfer function as
$$
H(s) = \frac{1}{\frac{s^2}{w_n^2} + \frac{2z}{w_n} s + 1}
$$
(sse here for instance).
However, it assumes that the ...
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Help understanding a control system represented by coefficients of theta?
I've been working with control systems and transfer functions recently, but I've come across a format that I haven't seen before using coefficients of theta, and I can't find any information about it. ...
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IAM unable to solve these block diagrams
I need transfer functions for the block diagrams... IAM unable to solve those.. can I get help
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Order of a system
I can find it when the transfer function is written in standard form but I don't know how to find it if it is written differently. For example $G(s)=\dfrac{1}{s(s+1)^3}$, is this order three or four?
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How to obtain transfer function of control diagram with Internal Model Control?
I want to design a robust control system using the internal model design specifications. The block diagram is the one shown below:
I am trying to obtain the transfer function $\ \frac{Y(s)}{R(s)} $ ...
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Evaluate "damping" of higher-order transfer function - something similar to settling time without the discontinuities
I have an 11th order transfer function in the continuous domain (simplified linearized model of a grid-forming converter) and I'm looking for a way to characterize it with a single number for ...
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Noise sensitivity transfer function
Consider we have a second order system (plant) described by the following transfer function:
$$ P(s) = \frac{b_0}{s^2+a_1*s+a_2} $$
which is controller by a PD-controller:
$$ C(s) = K_p+K_ds $$
...
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Compare Genetic Algorithms and Markov Chain Monte Carlo in their statistical properties in parameter estimation task
I am using GA and MCMC for estimating the parameters of a transfer function. GA returns results that each parameter has one value when minimizing the error function, and MCMC returns the whole chain ...
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