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How to use harmonic fitting method
Hi @TTA, I'm interpreting your 'Harmonic' model as the 'Sum of Sine' model. If this is not the case, then you will need to crea...

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Simulation step size in simulink is very small and takes really long to run. Unable to solve it
Hi @Suhas Raghavendra Kulkarni, It's not bad for a beginner in Simulink to create a rather sophisticated model using mostly use...

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MATLAB code for fuzzy logic based battery scheduling for 24 hours in microgrid to minimize cost and grid dependency
Hi @REENA There are many syntax errors because the name and behavior of some functions in Fuzzy Logic Toolbox have changed sinc...

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Solving system of odes with a power using ode45
Hi @Thomas TJOCK-MBAGA I presume that Xinit is not equal to , and . I tested this with the ode45 solver, and it also works with...

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Need Help with MATLAB Fuzzy Clustering - Trouble Implementing Example
Hi @Baptiste Please take a look at this example. The data set is specified as a matrix with 9 rows, each representing a data po...

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How to open simulink example in matlab?
Hi @Jagadish Babu If you cannot find the example file in the MATLAB examples directory, then it is most likely that this exampl...

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I don't know why my code makes odeToVectorField error
Hi @Student, The highest-order derivative is embedded in or D2s. Notably, one of the terms in this context is nonlinear, as d...

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How do you solve equations with multiple variables?
Hi @Ilan, some multiplication operators (*) are missing. It is working now. % List of Parameters E1f = 233; v12f = 0.200; E...

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Application of any numerical root finding method (secant, bisection, etc.)
Hi @ABDALLA AL KHALEDI Take pride in the fact that your Bisection method yields the same result as fzero(). Cs = 0; d = 0.5; ...

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How do I solve an equation with an unknown variable?
Hi @TC Yes, there is a useful function called 'isolate()' in Symbolic Math Toolbox. If you want to do this iteratively, please ...

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Element Wise Matrix multiplication issue (.*)
Hi @Yuvraaj Pasumarthy, Update: With the values of zeta, beta, and mu provided, you can plot something. You can try experimenti...

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How can I show the stability graph?
Hi @Can Yilmaz, The transfer function can be rewritten as where where the characteristic equation defines the behavi...

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Solving symbolic third order polynomial
Hi @Axel Degrande The trajectory position is chosen to be a cubic polynomial. From this cubic polynomial, the velocity can be...

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How to simulate the forced response of a transfer function
Hi @Ali Almakhmari The 'lsim()' command is great when the Control System Toolbox is available. Here is an alternative approach ...

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How do I do a regress like this?
Hi @Leon I'm not exactly sure what you want. If you're looking to find the exact percentage drop, as @Image Analyst has shown y...

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How to find kp, ki, kd values from transfer function
The question (in the title) about finding PID gain values {, , } from an unspecified transfer function is not exactly clear. Giv...

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slow simulation because of integrator
Hi @Magda Since no details are provided to describe why the simulation is slow, I can only guess that the system is stiff. To a...

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How can i solve this.
@Nia, You can look up some examples here: https://www.mathworks.com/help/signal/examples.html More importantly, could you pl...

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how to find stable and unstable spiral point?
@Yixuan Qi, This is actually the Rayleigh Differential Equation. I assume you would like to utilize a graphical approach, as the...

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Integral MPC in Simulink
Hi @Ale_798 Thank you for clarifying the problem. I'm not an expert in MPC, but after reviewing your comment, I believe you can...

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LMIterm problem: Error using lmiterm, Complex number, NaN or Inf not allowed in A, B.
Hi @Syue-Cian The code looks okay. Can you show the matrix A_F? Performing Test #1: % Test #1 A_F = eye(2) setlmis([...

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wheeled mobile robot dynamic equation
HI @BINOY I don't see any specific question. Perhaps this is your first time asking a question in this forum. If you are not hi...

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Queries regarding PID Tuner app?
Hi @ABTJ The PID Tuner app assists designers in automatically tuning the PID control gains for a SISO plant to achieve a balanc...

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How to detect data that does not follow a bell curve?
Hi @Miguel Not sure if you can try it this way to compare the R-square value. Data that follows the bell curve tends to have a ...

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why my “pid” parameters(Kp,Ki and Kd) values are not showing up in pidtuner tool?
Hi @ABTJ, The command pidtool(B, 'pid') launches the PID Tuner app and designs a PID controller for plant B. However, plant B i...

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watching PID controller output value at perticular point
@rathod ujjval rameshbhai, Since no performance requirements are specified, the pidtune() command can be used to automatically s...

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I need Ant lion Optimization Matlab code for controller design for Four Tank System to contimue my research work.
@Praveen Kumar, You can find the Ant Lion Optimization (ALO) algorithm implemented in MATLAB on File Exchange. However, please ...

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Please help me solve this material balance
Hi @Rachael @Torsten has shown you how to solve PDEs in MATLAB. From the PDEs, you need to rearrange and rewrite the equa...

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solve ode with ode45
Hi @Lan If I'm not mistaken, 'dr' stands for 'damping ratio.' You probably want to observe how the response dampens over time. ...

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How to simulate multiple doses and generate only one plot?
Hi @Lo Are you looking to plot something like this? m1 = sbiomodel('onecomp'); r1 = addreaction(m1,'drug -> null'); k1 = a...

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