Questions tagged [matlab]

MATLAB is a commercial numerical computer algebra system

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843 views

How can i create a dead time between two signals in Matlab/Simulink?

I have a curcuit which outputs two different pulse signals from two different "PWM generator(DC-DC)" block. I will apply these signals to two different mosfets. Thus I need to create a dead time to ...
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1answer
340 views

Root locus for an open loop transfer function?

The function, rlocus(), in MATLAB is used for closed loop system roots for variation in gain K. However, I am curious if there is a similar function for variation ...
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75 views

how to edit the signal name of scope?

I used the Using the PLECS Scope to edit the scope but when it comes to the name of the signal I could not change even though I double-click on it and tries many times, is there any way to change the ...
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1answer
190 views

Create repeated pole/zero in transfer function---Octave

Say I have such a transfer function with a repeated zero $$ \frac{s^2}{s+2} $$ How do I enter this in Octave as a transfer function? Perhaps this question applies to Matlab as well. If the zero was ...
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0answers
119 views

Phase Locked Loop Gain Design- FM Demodulation

Say I am trying to demodulate a message up to 25kHz in frequency, with a peak frequency deviation of 75kHz and a carrier of 1MHz, implying a 200kHz bandwidth using carsons rule. Would I design the ...
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1answer
430 views

Triggering the thyristor for the single phase AC voltage controller in MATLAB

I have been trying to study the output characteristics of a thyristor based single phase AC voltage controller through the model in the picture attached. Could anyone tell me what I could do to ...
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1answer
556 views

How to increase the size of value of X/Y axes in Simulink scope?

I want to increase the size of the value shown in the X and Y axes so it can be seen in the report. If you look at this figure, we barely see the value:
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0answers
445 views

Matlab Phase Locked Loop Design : FM Demodulation

EDIT: It seems I've asked too much at once here. I'll do some more studying and come back if I have more specific questions. I'm trying to design an analog phase locked loop in Matlab. I've read ...
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4answers
90 views

How do I integrate a function and plot the result on Matlab?

I need to plot a function that has an integrate inside, but I don't know how to do this on Matlab. Function: \$ SOC(t)= SOC(0) - \dfrac{1}{Q}\int_{0}^{t}i_2(t)dt \$ time is in hours, current is in ...
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1answer
91 views

How determinate parameters for thermal-model battery (Advanced question about battery modelling)

I'm trying to simulate an electrical model based on Ceraolo battery model for lead-acid battery. The challenge in this model is to determine the parameters that describe it. I can understand and ...
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1answer
1k views

how to obtain the parameters of the step response within matlab in open loop?

I have step response in open loop of my model that i stored in workspace and I want to use Matlab to obtain the: T time constant, L dead time and A (see figure below).is there a command for that like ...
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1answer
527 views

step response data extraction from response data of a model(simulink)?

I want to design a PID controller with the step response method, so I needed to save the step response of my model in simulink in workspace (Vout) with saved format :structure wih time, I exctracted ...
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1answer
199 views

Solution for a set of non-linear equations

I am trying to solve the following equations for \$\delta\$ and \$K\$. I have tried Matlab function fsolve, but unsuccessfully. I also tried Wolfram Alpha and, ...
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2answers
2k views

shifting signal in simulink

I would like to know how to shift a signal in Simulink. The case is I am using PWM generator(DC-DC) and the input D is from a lookup table,a sine wave. From the PWM generator block i am taking the ...
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69 views

Constructing a reactive lighting system?

I've recently written a Matlab script to develop/simulate PWM output for RGB lights based on sampled audio input. I made this script with plans to actually construct a device that can run the ...
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1answer
588 views

What is the correct way to measure DC power at the output of a boost converter in a Simulink simulation?

I modeled a DCDC boost converter, and I would like to measure the power at the output of the converter, I do not understand much about simulation times, sampling, and this sort of thing, so I do not ...
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85 views

Pole-placement problem

I was following this example of implementing a pole-placement with an Integral controller. Matrices A_star=[-5 -3 0;1 0 0;0 -1 0] B_star=[1;0;0] desired poles -100,-8+i*11,-8-i*11 I know the ...
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0answers
285 views

Circuit Breaker Simulation in Matlab with Mayr and Cassie Equations

I'm trying to understand how to model arc circuit breaker. There is a simulation example as called Mayr and Cassie Circuit in Matlab&Simulink. I have examined Mayr and Cassie Differential ...
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1answer
778 views

Why simulink step response differs from matlab's step function?

step response is different in simulink showing oscillatory behavior unlike in matlab step function Transfer function Step response Block diagram in simulink Simulink scope
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1answer
93 views

Rayleigh distribution

Why do we have to multiple the complex uniformly distributed random variables by \$\frac{1}{\sqrt{2}}\$, for a Rayleigh distribution. In terms of when we want to transmit data across a Rayleigh ...
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0answers
32 views

Calculating cell resistance in dependence from cell temperature from CAN bus logs

I'm part of a formula student team. When we go testing we are logging the CAN bus data the car produces to further understand what the car is doing. We log all the battery cell temperatures/voltages ...
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1answer
62 views

Fourier Series, Transfer Function, Unexpected output

I am working on a project where I am trying to graph the output of input various functions represented by fourier series, applied to a transfer function of a bandreject filter. I am getting my ...
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0answers
147 views

Bluetooth System in MATLAB

There is a Bluetooth model in MATLAB that can be accessed using this command : commbluetoothfduplex Here its Link : https://www.mathworks.com/help/comm/...
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0answers
61 views

Struggling to figure out why this capacitor voltage is huge

As you can see in this image from simulations on Matlab-Simulink: I'm tracking the blue signal (reference current) using this circuit Which is in this 400 kV HVDC link as "Snubber". So basically ...
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2answers
382 views

MATLAB Code to calculate intermodulation and Third Order Intercept (of an Amplifier)

My well annotated MATLAB code and plot is attempting to calculate the third order intercept of an amplifier. I have raw data of a non linear transfer curve, Voltage in (array) and the amplified ...
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1answer
53 views

PD compensator matlab

I have a little problem which I cannot understand, control theory is not my specialty but I have been reading on it lately. I have a buck-boost converter which I modeled on matlab and I am trying to ...
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1answer
550 views

Sawtooth Wave Fourier Series - General derivation and Matlab issue

I am working on one of my first Matlab projects. I am trying to graph a sawtooth wave with 10-V Pk-Pk, 0-V average value. 50% duty cycle, 2.5 khz. I first attempted to find a general equation for ...
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1answer
73 views

MATLAB - Allowing only numeric input using Exception Handling [closed]

I am trying to handle exceptions gracefully such that when a user enters a character, when a number is expected, he is notified with a custom warning/message. I know that the try, catch has the ...
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1answer
494 views

Ltspice2matlab error: Bad tag name found!

Hi I want to convert the raw data generated from LTspiceXVII to variables in Matlab. I am using the LTSpice2Matlab function....
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2answers
786 views

Sine Function on Simulink

I'm trying to add the following function on my Simulink model. where C, B, and N are already variables in my file. Is the correct way to multiply omega by the gains 3N and N/2 an input that into the ...
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1answer
98 views

I2C Communication to the Matlab from Sensor board(8051 µC)

I like to connect my board to Matlab through I2C communication(I2C-USB cable). Is there any library or example scripts in matlab to do it? What are the procedure to do it. for example, I connected ...
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0answers
146 views

Why if I change the sample time in Matlab/Simulink modifies results in a huge way?

I'm having trouble with the circuit I'm studying but in order to modify some values, I want to get out this question of my mind. * Example 50e-6 * Example 50e-7 * Example 50e-8 I use a S-Function ...
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1answer
2k views

Issue with “Simulink does not support code generation”

I have something similar to this simplified following block diagram on Simulink. It looks rather messy. I want to replace a 3-point summing block with a function block, while keeping the same ...
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0answers
152 views

Design and simulation of snubber and hysteresis current control

I want to do an hysteresis current control with this circuit: that have three operation modes: in order to make the output current to follow a triangle wave as reference. I made a simple C code to ...
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1answer
117 views

Gyrator in matlab

I am new to matlab , i am trying to simulate a simple circuit to check my calculation I have done on paper. The circuit is the following, it has a gyrator and couple resistors.1 amp is flowing into ...
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1answer
202 views

Unable to verify Superposition Principle via Matlab

I am dealing with this problem where I want to verify the Superposition Principle via Matlab. I have a DC source of 100V, an AC source of 50V, 60Hz and three resistances, R1=10 ohms, R2=20 ohms and ...
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2answers
283 views

short pulse suppression

I'm looking to build a component (simulink) that cuts off short pulses in a digital signal (that has a varying pulse length). Does anyone have an idea? I thought about using an integrator and ...
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1answer
39 views

Matlab AWGN() function

How would do I add additive white guassian noise for an input SNR, without using the awgn() function on mat-lab? Are there any resources available that can help me to solve my problem?
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1answer
217 views

Transfer Function Conversion

I am working on a system which comprises an inverter with output LC filter feeding an induction motor Its trivial to calculate the resonant frequency of an LC filter, when the filter is loaded with ...
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0answers
304 views

Rolling shutter effect simulation on matlab

Hi I'm doing a simulation of the rolling shutter effect on matlab, in this case the image of the propeller is distorted, and I tried use a DC motor to simulate the plane's engine at home and filmed ...
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1answer
598 views

how to import data from MATLAB to ISE XILINX testbench

For a project, i need to take sine samples in MATLAB and somehow i need to call it in Xilinx ISE testbench, so that i can use them for further operations. Please tell me how to do it?
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2answers
1k views

ltspice matlab optimization

Has anybody used ltspiceIV in a optimization process using Matlab? I need feedback because I am running my circuit in transient analysis, and when I found the optimal point of my optimization, I ran ...
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2answers
449 views

Pole/Zero plot is the same for passive and active (w/ gain) bandpass filter, why?

I have designed an active inverting bandpass filter, and when comparing its pole zero plot to a passive bandpass fitler with the same cutoff frequencys, the pole zero plot is exactly the same, even ...
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5answers
208 views

Why is MATLAB a worthwhile investment in electrical design? [closed]

Is MATLAB a worthwhile investment when developing semi-standard circuit designs? such as fitlering, DSP, power supplies, usual things we all encounter. From what I have read and used, it provides ...
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2answers
3k views

Using of matrices in simulink block diagrams

All simulations I've done in simulink as yet have not matrix in their block diagram like the following picture : and they have block diagram structure like : for simulating a system that has ...
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1answer
180 views

Signal Processing of a raw EMG signal

I am a student. I acquired EMG signal (sampled at 1KHz) by using dry electrodes. At first, it was all noisy. I then applied a Notch Filter (@50Hz) and the signal looks better but still not great. Any ...
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1answer
89 views

Manipulating Amplitude and Axis of symmetry of BUBBA oscillator in Simulink

So far i have a bubba ocsillator that can produce smooth sinusoidal waves, but the output waveform is asymmetric about the y-axis and the amplitude is not 1. What exactly do i need to do to :- Make ...
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0answers
187 views

Configuring Arduino to use external ADC reference for Analog inputs through MATLAB support package

I am using the MATLAB support package for Arduino. However, I need to configure the ADC reference to external. MATLAB documentation doesn't really explain how to do this? Is there any way I can use ...
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0answers
82 views

Measuring sensor noise on analog channels of common single board computers

Using the "MATLAB support package for Arduino" package, I am trying to characterise the analog input channels on an Arduino Uno board. The underlying assumption is that all sensors are inherently ...
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1answer
359 views

Analog Phase Locked Loop Design

I am trying to design a phase locked loop in MATLAB's Simulink. For this, I am following this basic block diagram design: My original message signal is ~12 seconds long, has a bandwidth of ...

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