Answered
How to make a phase diagram plot?
Hi @Wing Nam If the analytical solution exists, then you can solve the ODE symbolically using the dsolve() command. From the re...

2 years ago | 0

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step response comparison of linear and non linear model
Hi @kruthika u To compare the results, you need to solve the linear system and generate the linear outputs, just as you would f...

2 years ago | 0

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how can I keep track of last n sec of data at each time step in Simulink model itself?
Hi @Sowmya Payyavula You can test out this Tapped Delay block. It can store data for the specified number of delay steps.

2 years ago | 0

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Answered
Can you share a thesis example about modelling of Unmanned Aircraft Vehicle for Simulink ?
Hi Tahsin, For modeling, reference books are usually very detailed in explaining the derivations of the governing state-space...

2 years ago | 0

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I am looking for advice on the best way to learn matlab. I am a second year PhD student trying to familiarize myself with problems or projects. Any advice?
Hi @Mac Kenzie Some prefer to read books, and some learn faster by watching videos. If you are a beginner, I suggest you should...

2 years ago | 0

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Error in pole placement
Hi @Ho Pui Sum That is the limitation of the place() command, and it is documentated here. In your case, the rank of the input ...

2 years ago | 0

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How to find the Transfer function of a Simulink output plot?
Hi @Atefeh Given the piecewise function defined for I propose a more intuitively understandable Heaviside-based formula, whi...

2 years ago | 1

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Help using fsolve (theta beta mach)
Hi @Evan Gehret If you have all the information on the right-hand side of the equation, then I think applying the inverse tange...

2 years ago | 1

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Need help to make a ode function asign a value
Hi @Lucas Resende As mentioned by others, we cannot directly test your code because some information about the parameters is no...

2 years ago | 0

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I need a help to plots pressure vs. Temp at equilibrium from the attached paper and in the same graph another plot using Peng Robinson model.
I'm not an expert in gas laws, but when the data is available (for example, in the fictional dataset below), you can plot the gr...

2 years ago | 0

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Answered
step response of non linear model
Hi @kruthika u Alternatively, you can describe the ODEs and the Outputs in a nonlinear State-Space System: In other words, y...

2 years ago | 1

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Answered
step response of non linear model
Hi @kruthika u For general nonlinear ODEs, you can refer to some examples in the ode45 documentation. To plot the state-depende...

2 years ago | 1

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Trying to enter a transfer function in simulink (tauD s + 1)
Hi @Wouter Mathematically, is equivalent to in continuous-time domain. As a simple test, if we inject a signal, , which is al...

2 years ago | 0

Answered
adding noise to the solution obtained from ode45/dde23
Hi @Muhammad, Does it work if you execute the following? [t, y] = ode45(@odefun, tspan, y0); noise = mynoise(t); % user-...

2 years ago | 0

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Answered
Struggling to Solve 2nd Order ODE with Multiple Initial Values
Hi @David Bloom I'm not an expert in self-trapped optical spatial solitons, but I'm attempting to reproduce the graph shown in ...

2 years ago | 0

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How can I fix the error message : Each rule must have a consequent pointing to a different output membership function.
Hi @Ahmad As requested, Stage 1 is tuned using PSO, and Stage 2 is tuned using Simulated Annealing. %% Sam's Data for 2 inputs...

2 years ago | 1

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How can I fix the error message : Each rule must have a consequent pointing to a different output membership function.
Hi @Ahmad The tunefis() command enables the tuning of fuzzy systems by specifying one of the five optimization methods and thei...

2 years ago | 1

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State space system gives incorrect plot
Hi @Julian Thank you for sharing the code. I didn't simulate this in Simulink but in MATLAB using the lsim() command. I plotted...

2 years ago | 0

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Cannot find a suitable controller for my state space system
Hi @Ethan Nobre The performance requirements are not clearly specified, other than addressing unwanted oscillations. Furthermor...

2 years ago | 0

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How to use a global variable when using ode45()?
Hi @David Before delving into the technical aspects of constructing the time-based event-triggered control signal, there are a ...

2 years ago | 0

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How can i connect this plot line
Hi @Near Fiern It seems that the endpoint of LxAB is not the same as the starting point of LxCB. You can perform a logical test...

2 years ago | 0

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Why my graphic always on straight line?
Hi @Nugroho Wisnumurti Although you haven't provided the Simulink file 'simulasi.slx', I believe your result indicates that the...

2 years ago | 0

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How can I get a time response from FRD model
Hi @Bentolila Yedidia There isn't a direct function called 'frd2ss()' for the conversion you're looking for. However, you can e...

2 years ago | 0

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Answered
How do I create a transfer function using the zp2tf function with following poles and zeros
Hi @Matthew I didn't know what code you have tried. But you just need to specify the zeros, poles, and the gain correctly, and ...

2 years ago | 0

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I am attempting to code a function with a differential (temperature with respect to time) and i am unsure how to do so
Hi @tyler You probably won't post a question here if you're searching on Google for "how to solve an ordinary differential equa...

2 years ago | 0

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6DOF joint accelerating without a force present
Hi @Nils van der Gaag In the absence of force, if the initial velocities are non-zero (or start from non-equilibrium states), t...

2 years ago | 0

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How can I define this differential equation in matlab syntax to solve it using ode45 ?
Hi @Namit Dayal Depending on the values of , this is one way to solve the differential equations using the 'ode45()' solver. He...

2 years ago | 0

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Answered
How to build a plot differential equations
Hi @Maria Please check your second state equation. It does not produce a circle in the phase portrait. However, I will show you...

2 years ago | 0

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Answered
Matlab cant find the inverse of my function
Hi @Muhammad Adillah The main issue is caused by the product term because it lacks a functional inverse: . Perhaps you will g...

2 years ago | 0

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Answered
Tune FIS with Training Data
Hi @Ahmad, You have the option to select one of the five tuning algorithms as shown below: "ga" — genetic algorithm "particle...

2 years ago | 2