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Joshua Levin Kurniawan


Last seen: Today |  Active since 2022

Followers: 4   Following: 0

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Hello, my name is Levin, I am a Flight Mechanics Engineer and a final year Aerospace Engineer student who specialized in MATLAB, Simulink, and C programming. Currently, I am interested in control, unmanned aerial vehicles, and their application topics.

Programming Languages:
C
Spoken Languages:
English
Pronouns:
He/him
Professional Interests:
Control Design, Control Systems, Aerospace Engineering, Aerospace and Defense

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Answered
How to validate that one datetime is greater than another
You can use traditional logical operator for datatime. Operator "<", if true, means that the first datatime will occurs sooner t...

6 months ago | 0

Question


Using fmincon to optimize Simulink model for optimal trajectory
Hello, so i want to search for optimal trajectory (by defining spline) position input to the Simulink Simscape Multibody model t...

7 months ago | 1 answer | 0

1

answer

Answered
How to use operations in for loop problems
For this task, you can use for loop as follows A = zeros(3,20); for ii = 1:60 if ii<=20 A(1,ii) = ii^2; %first o...

7 months ago | 1

| accepted

Answered
How to use LQR for setpoint tracking?
Hello Pedro. Regarding the LQR controller it has a unique properties. In this case, without an integral action, the controller o...

7 months ago | 1

Answered
Issue with contour plot due to different size
Here, the issue is that the size for using "contour" function is MATLAB must be comply as follows: t0 must be equal to size(H0I...

7 months ago | 1

| accepted

Answered
Rewriting in columns of Excel sheet
Hello, you can add this lines of code to create 3 loops by simply using for loop with defined matrix below. % Parameter combi...

7 months ago | 2

Answered
Does Matlabappdesigner support webmaps?
Unfortunately, it's not. However, you can utize the built-in Geoplot function from MATLAB. Hereby I attach the documentation for...

7 months ago | 2

| accepted

Answered
i want to solve 3 non linear equations in matlab
Hello, you can use the following code syms x y e1 e2 e3 eq1 = 72.25 + 23.29*x - 25.79*y - 6.592*x*y - 27.98*y^2 - 7.255*x*y^...

7 months ago | 2

Answered
What is the critical gain and critical period in twin rotor MIMO system? How to calculate critical gain in twin rotor MIMO system?
To check the critical gain and period for MIMO system, you can check the link below: Stability Margin using Control System Tool...

7 months ago | 1

Answered
I am trying to solve the system of two linear differential equations and create a phase diagram to asses the stability of the system.
First, you can define the ODE function function dydt = myODE(t, y, gamma, beta, yn, delta, lambda, pt, alpha) y1 = y(1); ...

7 months ago | 2

Answered
simulation of a rov in simscape
Have you already put gravitational acceleration value in Mechanism Configuration Block? To enables the gravitational effect to y...

7 months ago | 3

| accepted

Answered
Simulink rocket simulation, the scope is not working
What is your stop time? it seems like that the scope time scale is to big. In the top-right corner, you can click Scale X & Y (s...

7 months ago | 1

Answered
how to resolve that error?
In StateFlow, you need to define all of the variables. From what I see from the figure, you seems like to forgot assign variable...

7 months ago | 2

Answered
I am getting error:Warning: Failure at t=0.000000e+00. Unable to meet integration tolerances without reducing the step size below the smallest value allowed (7.905050e-323)
Error "Unable to meet integration tolerances without reducing the step size below the smallest value allowed " usually appears w...

7 months ago | 2