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Change value of parameters in simulink over time
Hi @Hoang Vu Huy If the parameters in the transfer function vary over time, then it is a nonlinear system. Nonlinear systems n...

environ 3 ans il y a | 2

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Surface Fitting of the Markov Modulated Poisson Process
Hi @Ghattas Akkad I have tested an example. If the surface is smooth and has a sufficient number of membership functions, the A...

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High Oscillations in 6DOF Aircraft Dynamic Simulation
Hi @George Given that an F-16 aircraft is capable of achieving a maximum speed of Mach 2, it may induce the aeroelastic flutter...

environ 3 ans il y a | 0

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I need MATLAB code that plots the aerodynamic power generated by a wind turbine vs the generator rotation speed for different wind speeds
Hi @itouchene You can clearly identify the relationship here: If the aerodynamic power is , the rotation speed is , and this...

environ 3 ans il y a | 0

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Simulink Constant Ramp Controller
Hi @Alexander Reiter I didn't check the Simulink model. However, the desired response can be achieved with a nonlinear controll...

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fitting data with a combination of exponential and linear form ( a*exp(-x/b)+c*x+d )
Hi @Md Shariful Islam The data seems to exhibit the pattern of an nth-root function (a form of the power function), given by ...

environ 3 ans il y a | 1

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Solving a system of 9 coupled equations, among which 6 are 2nd order and 3 are 1st order differential equations for realistic projectile flight.
Hi @Muhammad Areeb Khan Generally, we use ode solvers to numerically solve differential equations. You have probably heard abou...

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How do i add a changing input over a interval using ODE45?
Hi @Dirk te Brake I am unsure if I understand your 4-state differential equations. However, a speed bump can be mathematically ...

environ 3 ans il y a | 0

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I want to correct the trajectory of the double pendulum model.
Hi @KM, I can see the image, but I'm unsure if I can visualize the swing motion that you described. Perhaps you can try compar...

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How to plot a linear piecewise function on matlab?
Might as well... but this approach requires the fuzzy logic toolbox. https://www.mathworks.com/help/fuzzy/linzmf.html https:/...

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by changing input of fuzzy system the output does not change
Hi @arash rad The outputs change in the two tests below. More importantly, please check if the decision surfaces are expected a...

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LQR with variable matrices
Hi @Matteo Cazzetta The computation of the Linear Quadratic Regulator (LQR) requires solving the algebraic Riccati equation. In...

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Hello, please can anyone help me write the following functions in matlab?
Hi @Paolo I show you one example. You can learn it in 10 seconds. syms f(y) % create a symbolic function...

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How do I start modelling a liquid handling robot in Matlab?
Hi @John Smith Start by defining the coordinate frame. The Cartesian grid seems to fit in this application. Next, define the ...

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How can I change the symbol z to w in this figure?
Hi @Aisha Mohamed It is possible to labels of the data tips. Please refer to this example. https://www.mathworks.com/help/matl...

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Can anyone explain me what this symbol signifies?
Hi @Sarthak Mohanty The blocks are definitely not from Simulink. However, from the knowledge of this equation , it is probably ...

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ODE 45() equation problem, in the output screen, there are dozens of ans = 0 and ans = 1.
Hi @Sarah Millikin An example is shown below: tspan = [0 10]; x0 = 0; [t, x] = ode45(@odefcn, tspan, x0); % Solution...

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How to design a fractional order pid controller?
Hi @mohammad sh Unsure if you are asking about the math or the code. If math, then you should learn about the fractional-order ...

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My Pole Placement is giving an error
Hi @johannes, For SISO systems (as in your example), it is possible to manually determine the gain matrix such that the multipl...

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I wonder why the following code is not able to give a valid output? My objective is to solve a system of simultaneous ODEs with dirac comb func.
Hi @Mridupawan Deka I'm unsure if you expect the solutions like in these plots. Please check the functions of . The Dirac del...

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How can I find equilibrium points in a non linear ODE
Hi @Karl-JR If you unsure of how to analytically find the equilibrium point for the unforced case, then try look for "how to fi...

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how can I get ABS Control/Simulation Toolbox?
Hi @Daniel Atomsa If you have Simscape, then take a look at this example of modeling the Anti-Lock Braking System (ABS). https...

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Using problem based optimization to control a system
Hi @2Lindsay2, I'm unsure of what your expectation is. However, if the final position is changed to the origin, then the conver...

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Runge-Kutta-4th-order solution of 3 ODEs
Hi @Turgut Ataseven Fix the code as indicated below: tspan = [0 20]; % Time interval y0 = [5 5 5]; % Initial conditions...

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how to to make model on simulink to check rise time ,overshoot ,steady state error of tf ?
Hi @Muhammad Since you can use tf() function, I presume you have the Control System Toolbox. In the Simulink model, you can se...

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Solution Plot of the Constant Harvesting Function with Directional Field
Hi @Gith I'm unsure, but I think that it was the quiver scaling issue when the carrying capacity is too large (on the Y-axis),...

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How to normalize surf plots?
Hi @Athira T Das Are you looking for a plot with normalized output? syms x y x0 = -.5:0.001:.5; y0 = x0; w0 ...

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PID altitude control of quadcopter
Hi @Dhruvilkumar Chavada The following example is based on the pure math analysis on the contineous-time equations of motion gi...

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Predicting the value at y(t=8) using my model
Hi @Matt Boyles You can try something like the following to estimate the output. However, there is no guarantee that the estima...

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State-Space Matrix Closed Loop System C Matrix issue
Hi @Pablo Graale The output of the state-space system is . Your Ackermann's controller is full state-feedback, not output-feedb...

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