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# Sam Chak

Last seen: Today Aktiv seit 2020

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Beantwortet
how to solve the equation: Exdot=AX+Bu; with E is a singular matrix ? thank you
Hi @khawla mrad If your system is linear, then try using dss() command. See example below: If the system are nonlinear, then ...

etwa 2 Stunden vor | 0

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ODE response vs CCF response of mass-damper-spring system
Hi @J AI Because the output matrix really means for this output equation where is the output vector and is the state vect...

etwa 13 Stunden vor | 0

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How can i solve this equation?
Hi @Yigit Random numbers may or may not work because the 2D surfaces are trigonometric functions and bounded. If the selected n...

ein Tag vor | 1

Beantwortet
How can I plot this graph in MATLAB?
Hi @Itqan Ismail, search this function on MathWorks. help plot Here is an example: % Type out the line equations, and follow ...

ein Tag vor | 0

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Problem with automatic tuning for PIDs in a Linear Parameter Varying System
Try applying the decoupling mechanism to uncouple the dynamics so that the states behave like SISO systems. With the SISO mat...

2 Tage vor | 0

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explanation of ode45 for constant force
Hi @Ajinkya Analysis shows that the steady-state value of of the linear system is given by . In your case, I guess that the ...

9 Tage vor | 1

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Generate frequency spectrum of original and regenerated signal
Hi @Laveeza You can copy and paste it on the Workspace and hit [Enter] to run it. If you want to edit the code in the future, ...

16 Tage vor | 0

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how to display an output on a plot itself?
Hi @Mohiedin Bagheri Do you want to plot something like this? x = linspace(-5, 2, 701); y = - x - 3; z = 2*x; figure(1) pl...

16 Tage vor | 1

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Beantwortet
I have created a state space model for a pitch and bounce model of a vehicle, and I need help figuring out why one of my bode plots is not working and the other one is.
Hi @Tathva I provided some explanations below based on your queries about sys_2 and sys_3. ks1 = 34500; ks2 = 53400; ms = 1...

17 Tage vor | 0

Beantwortet
6dof joint simulation problem
@Ridhi Bansal Most likely that the simulation ran into one of the singularities. You must identify the singularities and don't...

17 Tage vor | 0

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how to implement fuzzy logic code without using fuzzy Toolbox
Hi @merlin toche Some functions from the fuzzy logic toolbox in your code do not work on the much older R2015a release. The to...

19 Tage vor | 1

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Tune rules in type 2 fuzzy logic
Hi @mona ali You can probably copy and edit the algorithm in tunefis.m edit tunefis so that you can call your desired user-d...

20 Tage vor | 0

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Where can I find Fcn block in simulink in matlab R2022a?
Hi @Adolfo Marro, @Andreas, @Harun GIRGIN You can try if the following blocks from the older release still work in your system....

21 Tage vor | 0

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struggling with plotting slope field of second-order ODE containing sign function
Hi @Kieth Duong, The slope field depends on how the mesh is generated. Denser mesh is more accurate but with quiver, it will pr...

21 Tage vor | 0

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Beantwortet
How to plot the direction field of a system of first-order ODEs using MATLAB?
Hi @Kieth Duong, The basic code looks like the following: [X, Y] = meshgrid(-2:4/14:2, -2:4/14:2); U = 2*X + 9/5*Y; V = -5/...

25 Tage vor | 1

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Beantwortet
Fuzzy Best-Worst Method
Hi @SOURAV MONDAL The Best Worst Method is relatively new, being conceived in 2015 for dealing with multi-criteria decision-mak...

28 Tage vor | 1

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Getting error when building Fuzzy Logic on Simulink
Hi @Ajay My guts tell me that in one of the three fuzzy inputs {Temperature, Humidity, and Wind Speed}, the designed MFs did no...

28 Tage vor | 0

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Beantwortet
Membership Trapezoid function Plot
Hi @Ameri The range for Last Hop is not given. So, you might try something like this: fis = mamfis; % Option #1: using rect...

28 Tage vor | 0

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Why wont the state-space block accept a mux input?
Hi @ymps Your given state-space model is , and you will obviously see that it takes only a SINGLE input after doing the ma...

29 Tage vor | 0

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Beantwortet
Adaptive step size solver for an ODE
Hi @Ali Kiral After fixing the code, you can compare your result with the result by ode45(). A little analysis shows that the ...

29 Tage vor | 1

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Beantwortet
Hi @Bernd I'm not sure if this is what you want because your code doesn't reflect what you described. Anyhow, take a look at th...

etwa ein Monat vor | 0

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Error occurred while running the simulation
Hi Marco, In most cases, the problem is likely caused by the singularity event, something like approaching the division-by-ze...

etwa ein Monat vor | 0

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Is there a way to change the value of the transfer function through MATLAB & Simulink?
Hi @영탁 한 On top of the Paul's proposed solution in Simulink, here is one of few solutions in MATLAB. If you like this solution...

etwa ein Monat vor | 1

Beantwortet
Tuning a PID controller to desired Overshoot, settling time and rise time
Hi @Muhammad This is the Root Locus compensator design approach, first attempt. s = tf('s'); Gp = 20/(s^2 + 4.5*s + 64) c...

etwa ein Monat vor | 0

Beantwortet
Solving system of ODEs with ode45
Hi @shir levi Edit: Previously I've got the same results like you did. However, after thinking about it, those 2 sets of 3 valu...

etwa ein Monat vor | 0

Beantwortet
How quarter car modeling on MATLAB?
Hi @Mustafa Furkan, I prefer the simulation-based numerical solution over the formula-based analytical solution in the example ...

etwa ein Monat vor | 0

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Beantwortet
How to write the feedback command here.
Hi @Hardik These are the basic commands. You can find more examples in the documentations related to commands. Search MathWorks...

etwa ein Monat vor | 1

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Beantwortet
Algorithm for rlocus (internal code of rlocus)
Hi @Pushkar K You can browse through the folders, or you can type the following to view the code: edit rlocus

etwa ein Monat vor | 1

Beantwortet
How to solve nonlinear equation?
Hi @GUANGHE HUO The nonlinear matrix ODE with time-varying stiffness matrix K can be transformed into a nonlinear state-space m...

etwa ein Monat vor | 0

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Beantwortet
How can i calculate the PI controller gains from my plant transfer function
Hi @Mads Olesen It appears that your intuition is right. The P-only controller is sufficient because the steady-state error is ...

etwa ein Monat vor | 0