# Birdman

Someone who is interested in Mathematics, Control and Engineering. Also, music as a hobby.

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**Content Feed**

Plotting a discrete impulse in Simulink

Try the attached model. See if it works for you. You can modify it.

3 years ago | 0

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how to change a variable value in the middle of simulation in simulink

Try the attached model. Copy the structure and replace it with the pulse generation block. It should work. Instead of writing p ...

3 years ago | 0

How can I save and plot all values of x and y for each value of C? x and y values are in the vertical axis and C in the horizontal axis in the graphic. I need to use the function "solve"

Try the following code: clear;clc; V=[1 2 3 4]; A=3; for i=1:numel(V) C(i)=A*V(i); syms x y eqn1=C(i)*x+y==2;...

3 years ago | 0

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finding an equation of the tangent line to a curve at the given point in MATLAB

Actually, it is quite simple to do. For instance, let's define the equation symbolically in MATLAB: syms y(x) y(x)=4*x-3*x^2; ...

3 years ago | 2

Solving differential equations with Simulink

If you consider the ramp imput as a function r(t)=t; then the equation becomes If you code this in MATLAB: syms x(t) eq=...

3 years ago | 0

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External Mode Error in Simulink - Using TI Piccolo F2803x

The main thing about External Mode is that you need to make sure that the code is running on the hardware before you try to run ...

3 years ago | 0

Simulink stateflow condition for single pulse input

Try the attached model. Note how the inside of Stateflow is built.

3 years ago | 0

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Square approximation with a second degree polynomial, function determine.

Simply, you need to use Curve Fitting app for this purpose. Define your Xi and f(Xi) vectors in MATLAB workspace. Then open Curv...

3 years ago | 1

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How to have a implicit function of a symbolic variable in our expressions and calculations

Simply, you can define symbolic functions just like symbolic variables: syms x y z f(x) A=(3*x+5*y+3*z+5)*(f(x)+z); diff(A,x)...

3 years ago | 0

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How to Find Kp,Ki for PI controller from Gain and Time Constant value Given

Simply, the conversion is as follows(Let K denote gain and Ti denote time constant): K*(1+1/(Ti*s)) is equal to Kp+Ki/s If y...

3 years ago | 2

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computing a sequence of vectors

Try the following code: n=1;L=1;d=1;q=1;%randomly given syms alpha C=0.5*q*sin(alpha)*[L+d]; D=0.5*q*sin(alpha)*[L^2/d]; ...

3 years ago | 0

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How to analyze signal and make proper filter?

If you want to have a starting point, following code basically takes the psd of the signal, so that you will be able to obtain t...

3 years ago | 0

How to put max function in symbolic function

Why would you try to name it as max? Simply, piecewise function in Symbolic toolbox would help you: syms x f(x)=piecewise(x<0,...

3 years ago | 1

Question

Receive Raw Ethernet Packet via Simulink

Hello, My question is simple: I would like to use Simulink, just like Wireshark, to capture and display raw ethernet packets. I...

3 years ago | 1 answer | 0

### 1

answerDerivate a function with two variable dependent of time

The following might help: syms r(t) theta(t) f(r,theta) f=r^2+0.2*cos(theta)-0.03 To take partial derivative, use functionalD...

4 years ago | 0

define tau in transfer function

The following might help: syms s t tau Cs=(1/s)*(1/(tau*s+1)); c(t,tau)=ilaplace(Cs) T=0:0.01:1; plot(T,c(T,0.1))

4 years ago | 0

Question

Capabilities of Building Standalone Simulation Applications in App Designer with Simulink Compiler

Hello everyone, For those who do not know, MATLAB released Simulink Compiler with 20a release which helps to build and deploy s...

4 years ago | 0 answers | 0

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answersHow is derivative made in Matlab ?

syms v(t) v(t)=t.^3-6t.^2+7; a(t)=diff(v); result=a(3.5)

4 years ago | 0

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Replacing characters in a string

One example(use regexprep): s="Yao Ming"; regexprep(s,{'Y','M'},{'J','Q'})

4 years ago | 0

How to update a variable in a function after every 5 seconds?

Run the attached model and see the results. You can change the Ramp block's Slope value and store different numbers. Output of t...

4 years ago | 0

Function like "find" but for lines

B=reshape(A.',1,[]); C=(1:numel(A)).*(B~=0); C=C(C~=0)

4 years ago | 0

Matrix with numeric values

N=4 A=1:N; B=char(64+A) 'ABCD' B(1) 'A' B(2) 'B' . . and so on. Change N and observe the results.

4 years ago | 0

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Solving non linear 2nd order differential equation

Try this: clear syms t Y0= input('wave amplitude ') ; %Wave ampli...

4 years ago | 0

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y[n] = x[n] - x[n-1] x[n-2] I need to find a) Find the transfer function. b) Give the impulse response. d) Sketch the frequency respo

Try this: z=tf('z',0.001); Gz=1-z^-1+z^-2; %%transfer function Gs=d2c(Gz,'tustin') %%impulse response figure(1); impulse(...

4 years ago | 0

How can I remove identical cell entries containing small arrays

The following code should simply do the job for you: unique(cell2mat(connect_group),'rows') After this, you can regroup the ar...

4 years ago | 0

Simulink-Sawtooth Decrease Counter

Try the attached model. Note that I didn't use Pulse Generator or Detect Decrease or Sum or Memory block. The model is very simp...

4 years ago | 0

how can I do this in mat lab

syms u(t) x(t) h(t) u(t)=piecewise(t>=0,1,0); x(t)=cos(pi*t)*(u(t)-u(t-1)); h(t)=1.5*(u(t)-u(t-1.5)); %%plot t=0:0.001:5; ...

4 years ago | 0

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Plotting the derivative of an "switch-funktion"

You may use Symbolic Toolbox and its beauties for this case :) Here is the code: syms y1(t) y2(t) y3(t) y4(t) y1(t)=piecewise(...

4 years ago | 0

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How can i fix the error 'Index exceeds the number of array elements (51)'

You need to apply elementwise division: x = [0:0.1:5]; y = sin(x)./x; plot(x, y), xlabel('xi'), ylabel('Theta'), title('Solut...

4 years ago | 1

| accepted