MATLAB is a commercial numerical computer algebra system

learn more… | top users | synonyms

0
votes
1answer
36 views

2nd order Sallen-Key Bandpass filter design in Matlab

I'm trying to design a Sallen-Key BPF within Matlab. With the documentation found on ti: http://www.ti.com/lit/ml/sloa088/sloa088.pdf, I studied and understood the basic. As for the design: The ...
0
votes
1answer
28 views

Feedback Control: Unexpected result for block diagram simplifications using matlab

I made some simple calculations regarding block diagram algebra. The problem is that I don't get the same result using matlab. Here is the system with it's corresponding blocks: $$H_1 = z+2$$ $$H_2 ...
-4
votes
1answer
45 views

Depth estimation in live video with a camera [closed]

How can I estimate depth and distance with a single camera in a project using live video in python or matlab ?(I haven't access to computer vision system toolbox in latest version of Matlab)
0
votes
0answers
35 views

How to determine continuous-time delta-sigma loop filter coefficients?

I want to design a 3rd order CT delta-sigma CIFB modulator having determined a noise transfer function, but I can't grasp details how to do this. I am using the popular Delta-Sigma Toolbox by R. ...
0
votes
1answer
43 views

designing PID controller using Ziegler Nichols algorithm

I'm trying to use Ziegler Nichols algorithm to design PID controller for the following transfer function: G=w^2/(2*xws+w^2), w=1 , x=0.2. so since the step response for this function is a second ...
0
votes
1answer
78 views

Setting up a PID controller in Simulink for an Arduino example project

On the internet I found this "Arduino PID Example Lab" as an introduction to PID-contole. I set up the hardware and it is working like it is diskribed in the document. Since it is possible to connect ...
0
votes
2answers
54 views

How to perform a \$\dfrac{1}{s+a}\$ type integration in MATLAB?

Currently, I am integrating an ODE of the form \$\dot x = f(x,t)\$ in MATLAB using the function ode45 This is equivalent (in block diagram form) as passing \$\dot x\$ through an integrator ...
0
votes
1answer
42 views

Sampling frequency and FFT

I have tried this example code for sampling and FFT in MATLAB, but I have noticed that when the signal frequency becomes closer to nyquist frequency , some errors ( small frequency components near the ...
0
votes
0answers
47 views

Phasor notation of a strange complex number

I'm asked to find the phasor of this signal: $$ x_1[n] = 3\sin\left(\frac{\pi n}{7}\right) + j\cdot4\cdot\cos\left(\frac{\pi n}{7}\right) \quad,\quad(0 \le n \le 20) $$. The phasor is defined as: $$ ...
1
vote
1answer
44 views

Controls: Getting the feedback transfer function of a Plant and Controller

I'm designing a function in Python similar to MATLAB's 'feedback(T)' command. I know modules already exist, but it's something I want to do for myself for fun. However, I am running into issues. Let's ...
0
votes
0answers
60 views

I cant get more than 30 degree difference with acceloremeter

I want to get output from adxl350 acceloremeter as degree. However when I rotate acceloremeter 90 degree it gives 30 degree difference in total as output. I am using matlab with arduino for getting ...
1
vote
0answers
29 views

Why does Simulink only allow you to linearize parts of your model that contain arrows?

I created a Boost converter but can't get its open loop transfer function because Simulink won't let me linearize. Here it allows me to linearize the input to the scope (I don't know what purpose ...
0
votes
0answers
49 views

Pulse for IGBT Rectifier in simulink

I have connected a Permanent Magnet Synchronous Machine(PMSM) to use as a generator(mechanical torque input -> 3phase output) to a IGBT bridge rectifier and I use PWM generator for the gate pulses. I ...
0
votes
0answers
88 views

How to study temperature influence on Li-Ion Batteries?

I would like to study and simulate the influence of the ambient temperature on a given Lithium Ion Cell. Behavior while charging or discharging for both internal Resistance and capacity. My ...
2
votes
1answer
134 views

How to calculate poles of overdamped, 2nd order system if only given experimental data?

I have been looking about how to calculate poles if I have experimental result of a step response in Matlab that looks like an overdamped system. So far I only found information (through internet or ...
0
votes
1answer
57 views

Step response of feedback system

We have a feedback system F(s) as in this figure: and this is the step response of G(s): and H=10. F(s): We got the root locus of the system F(s) as this: then we determined the gain ...
1
vote
2answers
74 views

Application to solve for Fourier series coefficients?

Does anyone know a way to solve for Fourier series coefficients using Matlab, WolframAlpha, random web app, etc.? For example if I wanted to solve for and plot the Fourier series coefficients for the ...
0
votes
0answers
28 views

Full scale range(FSR) of DAC

I have to implement quantizer block of DAC with resolution( effective number of bits) of 8 in MATLAB. However, the full scale range(FSR) of the converter isn't provided to me. Does anyone have any ...
-1
votes
1answer
56 views

solve a problem with simulink

I have this problem which i want to solve using simulation. How i think it shall work in Simulink( i am not sure this is the way to do it) : -measure power and then decrease the voltage and increase R ...
0
votes
1answer
52 views

Matlab: Channel coding and modulation [closed]

This is a beginner level question on understanding modulation and channel coding. The confusion arises when I am trying to implement the concepts. Let's say I have the information bits as ...
0
votes
1answer
50 views

Matlab simscape component modification.

I am new to Matlab. I wanted to use Simscape resistor element and want to make it Temperature dependent. However i open the code of the component by view source code. I modify the code but couldn't ...
1
vote
2answers
75 views

Reduce the impact of gaussian noise on DTMF decoder

I have a Matlab code to decode digits from a given DTMF audio file (wav format). Considering the input signal to be in the form of x(n)+αv(n) where x(n) is the noise-free signal (i.e. the given DTMF ...
-3
votes
2answers
65 views

Simulink Capacitor doesnt load in simulation

I have a capacitor connected to a Voltage source in Simulink and it doesn't load with Voltage ....The voltage remains constant...3V What did I do wrong ? The Simulation says the voltage across ...
1
vote
1answer
57 views

Function to Simulate Realistic Waveform

I need to simulate a realistic signal voltage triangle waveform in Mathematica. I know that a real waveform won't have sharp corners, but I don't remember exactly what a real triangle wave looks ...
0
votes
1answer
42 views

Get distance covered by a wheel using a gyroscope placed on it

I have to calculate the distance covered by a wheelchiar using data gathered from a gyroscope that was placed on one of the driving wheels. I know the total length of the corridor we used for the ...
0
votes
0answers
64 views

To find the MISO(multiinput single output)transfer function for boost converter in matlan

I have modeled the boost converter as circuit modelling(matlab) and found the steady state and dynamic response. now i want to replace the boost converter by single block as transfer function. so its ...
1
vote
2answers
45 views

How to find the transfer function of a frequency counter?

I am designing a mathematical model for my control systems project and in that there is this block which measures the frequency of the wave. For the practical application I fed this wave into a micro ...
0
votes
3answers
192 views

Transmitting data from MATLAB to FPGA

This is about design of a JPEG compression/decompression scheme on an Altera FPGA. It is possible to have camera or SD card for image input and TV or SD card for image output. However, these ...
0
votes
0answers
89 views

How to separate three phase signal in positive dq axis and negative dq axis in MATLAB/Simulink

I want to separate three-phase voltage into two groups positive and negative dq components (ie positive-direct voltage "Vd+", positive-quadrature voltage "Vq+", negative-direct Voltage "Vd-", and ...
1
vote
0answers
75 views

Fly-back converter

I'm trying to get 2 isolated outputs (5V and 3V from 12V DC supply) using a single flyback converter by adding one more secondary winding on the flyback transformer. Following is the Simulink model ...
-3
votes
1answer
190 views

PID controller DC motor Design using simulink [closed]

After playing the circuit, this circuit is showing the error. Tell me what is error in this circuit and what should be the P, I and D values for PID. ??? in block is not any error. It showing because ...
-3
votes
1answer
96 views

Voice controlled robot [closed]

Suggest me book name or link to study for voice controlled robot (DSP on matlab for voice recognition). What is the hardware module/ sensor for voice recongnition?
0
votes
0answers
30 views

Modelling Phase noise

I am trying to model phase noise. However, when i apply the fft and see the noisy signal, frequency peak location is changing however the spectrum is not broadening. Can anyone enlighten me what is ...
1
vote
2answers
84 views

applying for loop [closed]

I want to apply for loop. Below is my code. I have applied the for loop which is wrong. Here Length(t) is sample numbers. Here I want to create 'for' loop for a sample number 5 in particular. so how ...
1
vote
2answers
164 views

How to model Phase noise?

I want to model phase noise. Code below shows how I am adding phase noise in the signal. However, i am not getting correct output. That means, the signal sprectrum shoud be spreading in the frequency ...
0
votes
2answers
168 views

Matlab low pass filter design -removing noise

I am designing a low pass filter in matlab to remove the noises shown in the image. The original signal of interest lasts only for about 80 ms and rest of the signal are noises from probe tip. In ...
0
votes
1answer
114 views

Calculating Data rate function of bandwidth and SNR

I plotted BER vs SNR for BPSK modulation in Matlab and I am given bandwidth of channel (bandlimited channel). lets say it is BW1. I would like to find the data rate based on this information. I am ...
0
votes
0answers
30 views

Commands and data exchanged between the NI driver and Matlab data acquisition toolbox

I used Bronkhorst’s own openDDE to control part of the mass flow meters/controllers in my experimental setup, while one other was operated from a LabView interface. My supervisor now wants me to stick ...
1
vote
1answer
59 views

Voltage Drift on an Open Circuit (and how to get rid of it)

I'm trying to create a custom lick-port to detect mouse licking behavior. I am following a design published here that uses the junction potential between the mouse's tongue and the metal water spout ...
0
votes
0answers
49 views

I've got way too high voltage after the transfer function. Why?

I want to control a simple control system with Raspberry Pi and Matlab. The charactheristic of the system : -Control system’s output voltage range: -12V – 12V -Analog-to-Digital converter’s input ...
0
votes
1answer
65 views

Is it possible to transfrom a transfer function into voltage?

So I have a control system which I'd like to control externally. I have the error signal from the system and I use an ADC to convert the signal to number. I have the transfer function of the system ...
0
votes
2answers
637 views

Thyristor voltage regulator with different fireing angle for each period with simulink

First of all I'm really low with EE so please, go easy on me. As home assigment we have to design Thyristor voltage regulator in simulink. It should run for 5 periods with different thyristor fireing ...
2
votes
0answers
470 views

How to write optimal power flow constraints in MATLAB?

I am writing an optimal power flow (OPF) program. OPF is an optimization problem in which some decision variables like Generation, Load dispatch are adjusted in power flow program so as to minimize ...
-1
votes
1answer
83 views

Filters responses

I got a filter and I want to examine whether it is stable or not. My system has the following TF $$H(s) = \frac{0,0001s^4 + 10s^2}{0,0001s^4+0,05s^3+10s^2+s+1}$$ So after plotting the zpmap (shown ...
2
votes
1answer
438 views

State space modeling with disturbances using Matlab

I am doing a project which involves modeling a quadcopter in state space form using matlab. I first had to linearize the quadcopter equations of motion, and now have to implement them in a matlab ...
1
vote
1answer
148 views

MATLAB function fixdt() question

MATLAB has a function fixdt() that creates objects describing fixed-point or floating-point data type. So if we write ...
0
votes
1answer
490 views

MATLAB error: “acker” function not returning the same thing as ackermann's formula

I have a discrete time system Suppose I have the following AB matrix of my system $$A = \begin{bmatrix} 0 & 1 \\ 1 & 1.5 \\ \end{bmatrix} $$ $$B = \begin{bmatrix} 0 \\ 1 \\ ...
0
votes
2answers
56 views

How to achieve a block of Z^(-0.5) in Simulink?

I'm doing simulation in Simulink of Matlab, but don't know how to get a Z^(-0.5) cell like this:
0
votes
1answer
133 views

Why does my bandpass RF filter complain about Ts in Simulink?

I am doing a basic amplitude modulator, and I'm using as input signal for now a Gaussian noise generator, then I modulate it with a carrier fc=2e9Hz. When using Simulink along with a RF bandpass ...
0
votes
1answer
155 views

read and write error in matlab

I am trying to send a data=40 from matlab gui to pic16f877A via serial communication. To crosscheck value is properly transmitted to pic i also transmitted back that data from pic to matlab and ...