# Sam Chak

Last seen: Today Attivo dal 2020

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Risposto
Plotting Phase Portrait of Duffing Equation
Hi @Athanasios Paraskevopoulos This method utilizes the 'arrow()' function, which was created by Professor @Erik Johnson. You c...

3 giorni fa | 3

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The solution to the delayed differential equations using the code dde23 represents the solution by the third order Runge-Kutta method or what?
Hi @mohammed, Your guess is correct. If you click on the link to the dde23's Algorithm section, you will find that it states "d...

3 giorni fa | 0

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Error using FuzzyInferenceSystem/addOutput (line 866) Upper range value for variable must be greater than lower range value. Error in rulepruning (line 24) fis = addOutput(fi
Hi @Michael Bamidele The syntax to add output membership functions is incorrect. Use 'addMF()' instead. However, it is highly r...

3 giorni fa | 0

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Using state space in simulink
Hi @Marina Since you know the initial output value, the idea is to convert the Identified State-Space to an equivalent Canonica...

5 giorni fa | 0

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PID controller tuning for time-varying input
Hi @AleF Without more context about the specific system you are trying to control, it is difficult for us to provide targeted r...

6 giorni fa | 0

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How can I divide by the function variable in a Simulink equation?
Hi @Louis In the 2nd-order ODE, the independent variable 'r' can represent the radius of the system or another relevant paramet...

6 giorni fa | 0

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In this work, I am trying to connect two systems by injecting a delayed wave of the first system into the second system. In this system, there are several problems, including:
Hi @mohammed Both @Torsten and I have been trying to understand the problem you are attempting to solve. However, it appears th...

6 giorni fa | 0

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エンジントルクの求め方
Dear @雄祐 三浦-san The formula to calculate the torque produced by the engine in this specific example, is given in Equation 4, as...

6 giorni fa | 0

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In this work, I am trying to connect two systems by injecting a delayed wave of the first system into the second system. In this system, there are several problems, including:
Hi @mohammed Based on the information you have provided, it appears the two systems could potentially be combined and then solv...

7 giorni fa | 0

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Enforce Kinematic Constraint in Initial Value Problem ode45()
Hi @Jonathan Frutschy Visualizing a system with 600 masses can be challenging. However, I believe the kinematic constraint for ...

7 giorni fa | 0

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tuning model predictive controller
Hi @Mounira This is often a problem where designers begin with what they are trying to end with. Similar to some LQR practition...

7 giorni fa | 0

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I'm trying to solve two separate systems using ODE23 while controlling the number of indexes so that the indexes are equal for both systems, but I couldn't. Can you help? Than
Hi @mohammed Please review if this approach is accceptable. tspan = linspace(0, 5, 251); opt = odeset('RelTol',1e-3);...

8 giorni fa | 0

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Solve an ODE with the parameters defined in the function changing in a for loop in the main script
Hi @Paolo Trenta Let me know if the looping approach I provided is helpful. By the way, your original proportional-only control...

8 giorni fa | 1

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How i use break in continues data in couple differential? it is possible?
Hi @cindyawati cindyawati Please review the plots and verify if the microglia and the drugs are correctly injected in your Drug...

9 giorni fa | 0

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Ziegler Nichols PID Method
Hi @LORIS IACOBAN I revisit your problem. I'm unsure if you are looking for something like this: %% original system (marginall...

10 giorni fa | 0

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HOW TO CREATE TSUNAMI MODEL
Hi @Fadilla Neisa Looking for this? %% Tsunami model syms L H depthratio g positive syms x t w T R U(x) L1 =...

10 giorni fa | 0

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Fuzzy control problem:(1)input 2 expects a value in range [-1.5 1.5], but has a value of 4.36559e+24;
Hi @柯 This following issue does not affect the original "derivative kick" problem described in this thread. So, it should be tr...

11 giorni fa | 0

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Transfer function derviation for a system
Hi @DP From the differential equation, it can be rearranged to have the control term and the disturbance term. In state-...

11 giorni fa | 0

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Keep underscore symbol using latex as interpreter
plot(0, 0, 'o', 'markersize', 20), grid on legend('{\$03 \textunderscore\$May\$\textunderscore 2024 \textunderscore\$NoHS\$\textunde...

11 giorni fa | 0

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Find natural equation w with 5 dof
Hi @Trong Nhan Tran Based on the diagram and your equations, the natural frequencies of the system can be computed as follows: ...

11 giorni fa | 0

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Fuzzy control problem:(1)input 2 expects a value in range [-1.5 1.5], but has a value of 4.36559e+24;
Hi @柯 If there is no other way to directly measure the time derivative signal from the system, the proposed configuration with ...

12 giorni fa | 0

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Matlab file to fis file
I believe you can use the writeFIS() function "to convert" a MATLAB m-file to a .fis file.

12 giorni fa | 1

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Hey, how can i import and replace PCM model by trained neural state-space model in EV system level model
Hi @kavya If you're referring to the performance of the PCM controller in the EV system, it depends on what you mean by 'workin...

13 giorni fa | 0

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How to do I get the standard deviation from an eeg input signal in SImulink?
Hi @Tania Akhtar Since you're able to extract the EEG signal from the CHB-MIT Dataset and load it into the Workspace, it would ...

13 giorni fa | 1

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Error when using if-else statement in MATLAB function block. How can I fix this error described below?
Hi @Delika Weragoda Try using the Abs block to return the absolute value of the input.

13 giorni fa | 0

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How to solve a highly non-linear ODE containing multiple powers?
Hi @Sean You mentioned that c1, c2, c3, and c4 are all positive known constants. Now, let's consider a special case of your dif...

13 giorni fa | 0

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sat(s/ε) implementation in Sliding Mode Control of DC-link voltage ?
Hi @Shahinur Rahman You can try this approach:

14 giorni fa | 0

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find frequency eqaution and then compute for the non zero natural frequencies
Hi @DP A 5-coupled mass-spring-damper network constitutes a 10th-order system. If you are referring to the 'frequency equation'...

14 giorni fa | 0

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Matlab tool to plot 3d phase portrait
Hi @Shreshtha Chaturvedi If you want to use multiple slider widgets for alpha and beta to visualize the interactive 3D phase po...

15 giorni fa | 0

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How to solve nonlinear equation?
Hi @Semiha I'm afraid that the nonlinear differential equation may not have an analytical solution. In such cases, you can util...

16 giorni fa | 0