Simulink is a MATLABbased graphical programming environment for modeling, simulating and analyzing multidomain dynamical systems. Its primary interface is a graphical block diagramming tool and a customizable set of block libraries. It offers tight integration with the rest of the MATLAB environment and can either drive MATLAB or be scripted from it. Simulink is widely used in automatic control and digital signal processing for multidomain simulation and modelbased design.
Hi I am back :).
I have been doing some Simulink modeling for a project. I modeled it with a discrete system due to the controller rate. I have noticed that for all the discrete system I have tried, adding a derivative filter not only improves the performance (smaller settling time), but it is...
Hello everybody
I have a question about my control system, and I've included a diagram for reference. In the diagram below, I've illustrated three different control schemes using Simulink. The first scheme represents a PI controller for a massspringdamper system, which I understand well. It...
Could I get some input on how to fix this problem please? Thanks in advance!
The exercise for which I need the model.
The simulink model together + the error that needs to be fixed + Matlab code used:
Note: Gain 1 = 1/Ti
The implementations for the two filters in simulink are as follow:
For the first filter:
For the second one:
The obtained results have values of 10^12, while the expected results should be between 10^3  10.
Since it's the first time when I try t implement a tf with variable coefficients I...
Hello, I am a final year mechanical engineering student designing a heat pump with a linear compressor for an electric vehicle and have decided to model this using Simulink, I would love some help on the governing equations/formulas needed for each component of the heat pump as well as guidance...
Equation:
, where matrix D, C, G and F can be represented by
I'm supposed to design a control system that looks like this:
I am given that the dynamic model = fcn(D,C,G,dq) where the dq is the same as 𝑞̇ and d2q in the diagram is the same 𝑞̈. The default initial value of [𝑞(0), 𝑞̇(0)] is...
I tried to simulate the circuit but I got unreliable results. Here's what I got when I set the duty cycle to be 20%:
Stop Time = 0.02
The efficiency is more than100%.
Here's the parameters:
Could someone please let me where is my mistake?
One thing that is given in paper (attached) is a operating set point for temperature which is given as 20 for day and 16 for night but I do not know whether its initial condition for temperature or not. Can anyone please guide me that what kind of equation is it and how can I solve it with these...
Good afternoon,
I have developed a Vector Control for a PMSM motor in Simulink using Simscape Electrical but my motor is not spinning. I have tried applying various speed values but nothing happens. I am applying a step signal from 0 to 300 but the motor speed still doesn't move. My error...
I am trying to model an evaporator which evaporates water to steam in Matlab/simulink. Are there any governing equations i need to know and follow when modelling the evaporator mathematically? Please let me know.
I am trying to design a compressor in simulink. the mathematical equations has been modeled. but i just need, is there any relation to find the rate of change of volume with respect to time in compressor. Are there any equations or relations to find the rate of change in volume. As its a...
Hello all,
I've decided to post my question on here as it seems to be a more active forum over Matlab's one.
So what I am after is help when with modelling, now, when I model in Solidworks have assemblies within the main assembly, but the issue with this is that it's not detecting the joint...
I am new to Simulink and I wanted to start practicing using a spring mass damper system. My first tutorial was this:
Later, I wanted to model a spring system where a mass moving at a known velocity hits the spring. The governing equation and a similar modeling method given in the previous...
I'm trying to get saturation characteristic of current transformer in simulink...
In simulink, there was an example of a current transformer : https://www.mathworks.com/help/physmod/sps/examples/currenttransformersaturation.html
And in this document, it said : the CT is assumed to saturate...
I'm reading this Document : https://www.mathworks.com/help/physmod/sps/examples/currenttransformersaturation.html#d117e16073
In this document, it said : "Open the CT dialog box and observe how the CT parameters are specified"
How to open CT dialog box in simulink ? Thanks for your help
Hi, I'm learning Electrical engineering, and I'm trying to Simulate distance protection, using matlab/simulink
I searched google and it has many documents about this problem, but those only show the result, and also i can't find any simulation file
So i have many questions :
1. how to calculate...
Homework Statement
Homework Equations

The Attempt at a Solution
Here's my work :
When I add the DC current source , it shows a red dotted line and won't connect to other elements .
Any help would be greatly appreciated !
Hello,
I want to develop a pressure regulator model in simscape. The model will be the springloaded direct acting system and the aim is to target outlet pressure, temperature and flow rate by giving input parameters as pressure, temperature, spring stiffness, length and preload, lever(it is...
greetings.
I designed a system on simulink.
it is missing a pmsm.
I found a block on simpowersystems in simulink nde matlab.
I hope that this engine provides a nominal power of 96kw and maximum of 100kw.
so how to test it? to verify that this engine can deliver these two powers?
cordially. said.
I have a system that I have built in Simulink with a step input and scope output. I would like to measure the peak overshoot, settling time etc. In Matlab this can be done using the 'step' command and generating the characteristics from the Figure window. Is there a way of getting the same...
Consider, I have a dynamic system model for air compressor. Which means I have modeled the system by including its physics. Does this means I also included the transients of the system?
What I think is, when i modeled any system with equations, I think that includes the transients. Is it...
Dear Forumers,Given a simulink model:
http://www.femm.info/Archives/contrib/images/TransientLoudspeaker/SimulinkOverview.png
I would like to implement fast code for it.I have no access to matlib or simulink at all, so I tried to implement the simulation in C code.
Code for the block...
Hi,
I have designed a variablebased observer analytically on paper. Now it's time to implement it in Simulink/matlab.
Suppose we have followings in a tire model. The EOM says:
J\dot{\omega} = TR_eF_x
m\dot{v}_x = F_x
where J is the inertia of the wheel, \omega is the angular velocity , m is...
Hi,
I've had obtained a mathematical model for the slip controller issue.
As you see I have the diffequation for the slip. and the input that force the system to zero error is provided as well. Now it's time to implement it in simulink or matlab.
I took a look at the example provided on...
Greetings,
For the past 5 days i have been learning how to use simulink.I decided to try and model a mechanical system described by the equations in the picture below.I provide a second picture with my work so far.A couple of questions that i have are: a)How do i include the first equation? and...
Hey all,
I've been trying to debug a model I've created of a 4DOF geared system within Simulink by reproducing the results in MATLAB going from a 2DOF upwards to verify the dynamics are acting correctly.
At the moment I am purely trying to model the stiffness between two gears, my equations...
Hi there,
I am modelling a four degree of freedom system which is the dynamics of two spur gears in mesh, having two rotational and two translation degrees of freedom, respectively, a diagram exhibiting the system can be seen below.
I have derived the equations of motion (EOM) and...
Hello everyone, I would like if someone could help me with a little excersie here.
1. Homework Statement
I am trying to simulate a mechanical system from a differential equations in simulink, but I don't know If I am doing it right.
I've made the model as you can see in the 2nd picture...
greetings, here I found a Simulink model on mathswork, I want to replace the battery with a fuel cell, so I'm stuck at the level of the energy management block.
here is the link of the model:
https://www.mathworks.com/matlabcentral/fileexchange/28441hybridelectricvehiclemodelinsimulink...
Hi
I am trying to simulate a boost converter in Simulink, but I have a problem. When I measure the inductor current it shows as a triangular waveform instead of an exponential waveform like I would expect, does anyone know why? Does simulink do some simplification I am not aware of...
hi all...am trying to generate sinusoidal pulse width modulation using arduinosimulink for my inverter board...I simulated the SPWM logic in simulink, then installed the required support package for arduinosimulink...but i am facing some problems...I started from basic...like linking arduino...
Hello Everyone,
I am designing Simulink model for HIL testing. Basic concept:
Input: Throttle angle > Injection timing from that I have calculated requested torque (% of max torque)(chekced and correct)
Real torque follows requested torque with delay. (long list of conditions depending on...
Hi I would ask someone that is pratical with Simulink in particular of Simscape about a problem which involve my simulation in MatlabSimulink of a permanent magnet synchronous machine that is connected, by a rectifier, to a DC current source.
all the blocks of the simuation are included into...
Homework Statement
Hello, long story short: I need to create a model of LiIon battery and I'm stuck on calculating the battery equivalent internal impedance. The thing is, I don't know the equation or even how to make one. However, I have a circuit drawing:
Homework Equations
Values in...
Homework Statement
I would like to know a way to design an impulse input in a Matlab Simulink model. I know there are step input and ramp input blocks but there is no impulse input block.
Homework Equations
The Attempt at a Solution
If any working is needed please let me know
Homework Statement
I was asked to draw a Simulink Model for the above (car suspension) system.
m = 250kg
k, spring constant = 70000N/m
c, damping coefficient = 3000N/m/s
Homework Equations
If any equations are needed please let me know
The Attempt at a Solution
The question says to draw...
Hello guys, I found this forum using google because I need help with simulating bungee jump model.
I've already done that with zero initial values and it looks good but I want it more realistic :
Let's say L is the length of rope so elasticity force starts acting when y=L so logically time...
i am given an equation which i have to solve in simulink. the equation is quite veered to me. some one help me in understanding what kind of equation it is so that i can solve it in MATLAB simulink.
(2+x^2)theta'' + (2xx' +1)theta' + 9.8(xcosthetasinthetha)x''=T
Homework Statement
Homework EquationsThe Attempt at a Solution
Part (a)
Starting with the formula
$$ g_{c} = \frac {g_{CL}}{g_{p}(1g_{CL})} $$
The controller transfer function is determined,
$$ g_{c} = \frac { \frac {1}{\lambda s + 1}}{\frac {k_{p}}{(\tau_{p1}s+1)(\tau_{p2}s+1)}
 \frac...
Homework Statement
Homework EquationsThe Attempt at a Solution
Hello,
I am trying to construct the model, but I don't know how to incorporate 3 steps. I tried making 3 step blocks, but the input for the transfer function will only take one line. Then I tried to use one step block and make a...
<< Thread moved to the HH forums from the technical engineering forums, so no HH Template is shown >>
The model:
The goal:
1. Create a three phase voltage
2. Do a alphabeta transformation
3. Do a Cartesian to Polar transformation
4 Check the output angle
The expected result:
Since the space...
Ok,here is the problem. The block holds and delays the input signal for some time but what is a major integration step?Where is the integration?And if we choose inherit sample time,from where does the block inherit sample time?
hello people,
I have MATLAB R2014a installed in my system, i would like to do some electrical simulations. Unfortunately I am unable to find SIMSCAPE in my library. Can anyone suggest me how to get it.
thanks in advance.
I have a model of car, my aim is to make a simple model of adaptive cruise control. The only input to this model is a user set distance (range 2 to 50 meters), this is the distance that our vehicle should maintain between itself and the leading vehicle. I plan to control this using throttle and...
Hi there,
I'm trying to simulate savonius and Darrieus rotors in simulink.
below is brief summary of how much i have done:
1. I found Darrieus model
2. Darrieus MATLAB code done.
3. the simulation was great and successful
but...
1. I couldn't find Savonius model
2. I tried with a difficult one...
Homework Statement
Upthrow simulation Conditions: initial velocity v=10m/s, initial height h=0m when t=0. Gravity acceleration g=10m/s2 .
Using Simulink to simulate the variation of height with time when t≥0.
Homework Equations
I figured that the governing equation should be:
Height =...
Ok, say I have a sine wave block that has a frequency of 60Hz. What can I do to get that frequency as a number so I can use it as an input to another block? I've tried various things such as a "sign" block that counts when it switches from positive to negative and then a counter that resets...
hi , i am designing a data scrambler block in simulink. it is for wimax system so i have designed one using delay units, XOR gates.i used the specification specified for the initial condition of delay elements and feedback connection according to wimax forum specifications, but i am not able to...
< Mentor Note  thread moved to HH from the technical engineering forums, so no HH Template is shown >
\frac{d^2 \theta}{dx^2}=\frac{x}{10}\cos \theta  \frac{9.8}{10}\sin \theta
I'm supposed to draw a simulink diagram for this equation and find the response to a unit step function
This is...