Community Profile # Sam Chak

Last seen: Today Actif depuis 2020

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Wind turbine model block, cp(lambda, beta) function syntax error
Hi @Rajagurunathan P The error clearly tells you that the math expression has a syntax error, which is a common error when prog...

environ 14 heures il y a | 0

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Matlab 'pidtune()' function Algorithm
Hi @Ann-Christin Schlupek The PID Tuning Algorithm is described on this page. In slightly technical terms, pidtune() contains ...

1 jour il y a | 0

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how to model stairs in simscape multibody?
Hi @Nayla Are you looking some kind of "staircase-shaped function" that is generated by a mathematical function? Or, you are l...

2 jours il y a | 0

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im trying to model the drive train model of wind turbine, i need to get oscillation and the steady state waveform
Hi @peddada sandhya rani In the absence of the effects of the constants and in the original math model, then the system is st...

3 jours il y a | 0

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How to input exponentials in transfer functions using Simulink?
Hi @Milca Munguia You can insert the Transport Delay block (found in the Library of Continuous function blocks) after the trans...

5 jours il y a | 0

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LQR regulator doesn't regulate the system
Hi @DoctorCrow Your selection of and results in the closed-loop eigenvalues having negative real parts very close to zero. Co...

5 jours il y a | 1

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Fuzzy logic rule for out of range
Hi @Luca Ferro, Thanks for the sketch. I don't know your desired intervals, but linsmf should be the one that looks like your ...

5 jours il y a | 1

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how to give speed in quarter car model/
Hi @Vikas I'm no expert but I think the speed of the car is somewhat related to the Road Surface Profile. If the car stops tra...

6 jours il y a | 1

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Why is the ODE45 producing NaN values for all the set of solutions?
Hi @Udaya Kiran S This is how I checked. It is because some parameters in produce Inf and NaN, where your ODEs depend on. Yo...

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ControlSystemDesigner displays empty graphs
Hi @Fernando Lopez Update: The Control System Designer App can be opened. The Toolbox and the function have no issue. Have you ...

7 jours il y a | 0

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ode45 for sinc function
Hi @Muhammad Although your system is highly nonlinear, the ode45 can evaluate the sinc() function. However, your choice of init...

7 jours il y a | 0

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How to solve three coupled partial differential equations using matlab code?
Hi @Shreya There is an article on Solving Partial Differential Equations. The corresponding article is linked. https://www.ma...

9 jours il y a | 0

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LQR controller tuning in a closed loop system problem
HI @Junhwi The LQR in this example is designed in continuous-time. Can you obtain the discretized control system? % LQR DC mot...

9 jours il y a | 1

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Simulink error: Time-Varying State Space block
Hi @John If you want to get the state vector , then you can consider this approach because the output vector can be constructe...

10 jours il y a | 1

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eig(a,b) matlab symbolic
Hi @mohamdi mohamed Are you looking for the analytical solution like this? syms k1 k2 kx m1 m2 K = [k1+kx -kx 0; -k...

10 jours il y a | 0

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how can i use the genetic algorithm in order to optimization the pid controller in quadruple-tank system
Hi @aseel mohammed Here are the steps to use the genetic algorithm (GA) to optimize the PID controller in the quadruple-tank sy...

10 jours il y a | 0

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Which requirements and Tuning Methods in Control System Designer are needed to tune PID parameters in a cascaded loop when intput is an oscillating signal
Hi @Iaroslav Gryshchuk The 2nd-order plant is non-minimum phase. I'm unable to track the relatively fast 1 Hz sinusoidal signal...

12 jours il y a | 1

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Plotting a Sine wave in MATLAB
Hi @AluminiumMan The first example of the plot() function doc exactly shows how to plot a sine wave. https://www.mathworks.com...

12 jours il y a | 0

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hello I am using a bat optimization algorithm on an adaptive control and this what happened after running code
Assuming that the system is stabilizable and controllable, if the Bat algorithm works well for other optimization problems, then...

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How do i know the name of these blocks that marked below
Hi @Karam Karas Block in yellow circle looks like a Mask, which is a custom user interface for a block, but can be easily const...

13 jours il y a | 0

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Can you explain P(s) block of simulink model of fuzzy ann controller?
Hi @AJEESH ANTONY P The P(s) block is actually a Proportional Controller block (set from the default PID block) with the extern...

15 jours il y a | 0

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Does anyone have a plant Transfer Function for a Tubular Heater? Or does anyone know how to mathematically model a tubular heater?
Hi @Chelsea Kaye Vergara You will find probably find this article useful for modeling the dynamics of the tubular heater. The ...

15 jours il y a | 0

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how to convert tranfer function into a polynomial function?
Hi @H I think you use the minreal() and tfdata() function. s = tf('s'); ncp = 1.656e09*s^4 + 2.751e12*s^3 + 1.196e15*s^2 + 4....

15 jours il y a | 0

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Hi @Prasad Joshi Initialize a vector for y will solve the issue. Else, you can also use the Matrix Concatenate block. function...

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I have solved a set of three coupled odes in MATLAB. I have to plot another function which is a function of one of these odes. How this can be done?
Hi @Rakhi Two methods are shown in the example. The 1st method is by logical intuition. If deln depends dy(3), and the equation...

23 jours il y a | 0

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Rewrite the compensator formula for a pd controller into the general formula.
Hi @Joris Bogaerts The PD compensator from your lecture note appears to have the same structure as the standard form of the PD ...

24 jours il y a | 0

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Can't find control system tuner in simulink
Hi @relue Not exactly sure what happened. While waiting for the solution from the Staffs or other Users, you can use this trick...

24 jours il y a | 0

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how to add a perturbation while solving ode using ode45? can i use the analytical approximation of Heaviside function for it if yes how?
Hi @SOUVIK DARIPA If the perturbation looks like a step disturbance, then you can try using the Logictic function instead, whic...

25 jours il y a | 0

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Simulink PID Controller not behaving Properly
Hi @Nick Update: The reason behind the instablity is caused by the Fixed-step size solver. If you want to let (by default), ...

25 jours il y a | 1

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How can I define the error function and use a Maclaurin series to approximate a value?
Hi @codeconstructo Are you looking for something like this? syms x T1 = taylor(erf(x))

25 jours il y a | 0