Answered
PID Tune: Plant cannot be linearized
Hi @Arash Most likely your PV system has components that contain discontinuities. Thus, the Plant cannot be linearized. Howeve...

3 years ago | 1

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Answered
State-Space Matrices
Hi @Aysel Alimirzayeva I added a simple example to show you. If you like this example, consider voting 👍 the Answer. Thanks! S...

3 years ago | 2

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Plot step response of transfer function
Hi @Ye Ken Kok It is a input-output difference equation. Thus, you cannot use the continuous-time Laplace transform. Since the...

3 years ago | 1

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tuning PID controller in simulink with actual hardware equipments
Hi @aakash dewangan If the transfer function is unknown, and the system is relatively simple, perhap the model-free extremum-se...

3 years ago | 1

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Answered
Help with formulating conditional logic.
Hi @Jeffrey Lewis There are a few ways to do it. But since you have written the data into the code, I think probably the simple...

3 years ago | 1

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Answered
State-Space Matrices
Hi @Aysel Alimirzayeva It's because of negative feedback. The LQR function only computes . Making a substitution

3 years ago | 2

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Answered
runge kutta for 2 order ODE
Hi @Rio Bratasena Assuming that the symbol is the Dirac impulse. please check if the following responses are expected wh...

3 years ago | 0

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Calculating system bandwidth using Function "bandwidth"
Hi @Alireza Aghdaei The function can distinguish from the input type. One requires a Dynamic System Model, the other requires a...

3 years ago | 1

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Answered
how does matlab simulate electric field
Hi @abdullah Typically, the quiver() function can be used. You can also find a very good example on the simulation of Electri...

3 years ago | 3

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Solve system of equations graphically
Alternatively, you can also do like this: Solve or plot this polynomial: x = -2:0.01:2; y = x.^4 - 6; plot(x, y), gr...

3 years ago | 0

Answered
What block is hydraulic/liquid on/off valve in Simulink?
Hi @Busuyi 2nd Edit: Based on your sketch, it should be a Gate Valve. https://www.mathworks.com/help/hydro/ref/gatevalve.html...

3 years ago | 0

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i need help to find impulse response of system h(t) at time t
Hi @Rushit Bhavsar I used the impulse() method. but you can try using the expm() method. Look up the example and verify with th...

3 years ago | 0

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Does the fuzzy inference system (Mamdani) use Forward Chaining or Backward ?
Hi @Sarah IF you understand that the Fuzzy System provides means of reasoning by inference in order to decide the truthness of ...

3 years ago | 0

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Can anybody give me the idea for implementing PID control for dc motor using state space equations through ode45 solver?
@MOHAMED ASWER Not sure how your DI/dc motor system, but I think the following example should give you the basic idea. tspan ...

3 years ago | 0

Answered
Find AIC, AICc, BIC for ODE system
Hi @TrevorR You can try using this command [aic, bic] = aicbic(). For more info, please check: https://www.mathworks.com/help/...

3 years ago | 0

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How can I obtain the State space from the Mass,stiffness,damping matrices
Hi @aiman If the matrices are known, then you can apply these formulas: A = [zeros(n) eye(n); M\K M\C]; % to get the State...

3 years ago | 1

Answered
How to tune PID controller from time constant and static gain?
@Bruno Araujo, Not sure if you are looking for some manipulations like this: Kp = 72.402; Tp = 639.24; Gc = pid(Kp) Gf = tf(...

3 years ago | 0

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Cost function to minimize variance of error
@Rishabh Pachchhao, Since you didn't provide info about your system. here is an example that you can study. However, I don't t...

4 years ago | 0

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How to solve this equation
@Raef, you are a good son and took up a filial duty to help your father. n = 1; y0 = 1; % intial value F = @(t, y) - (1...

4 years ago | 2

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Answered
Can anyone help understand what the blocks in this figure are and where to find them in Simulink library?
Hi @Busuyi If you compare with the generic symbols in a Piping and Instrumentation Diagram (P&ID), they are manual-operated Gat...

4 years ago | 0

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Find the local and global maxima and minima for the function (x+1)^2/(1+x^2) x belongs to [-5,5].Showing local min value something different than zero and how get local values
@Aashay, your code works. So, what exactly is the question for the math problem? syms x f(x)=(x+1)^2/(1+x^2); I=[-5,5]; fl(x...

4 years ago | 0

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Fossen's dynamic AUV model implementation
Hi @John Terry You can follow a few examples on this link and apply the [V, S] = odeToVectorField(eqns) command. https://www.m...

4 years ago | 0

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Solving a State Space Model using Runge Kutta method, Mid Point or Heun Method to view system response
Hi @Anas Rehman If you still keep the old versions of MATLAB (R2012 and older), you can find the requested ODE solvers in the l...

4 years ago | 0

Answered
Using fminsearch and then using the output of fminsearch in cost and ode function.
Maybe like this: [lambdas, cost] = fminsearch(@Q1_cost, -100) [interval, sol] = ode45(@Q1_ode, [0 10], [0.5 lambdas]); plot(i...

4 years ago | 1

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Answered
How can I obtain a equation from my fuzzy or ANFIS model done using tool box?
Hi @Lilly Mercy and @Tony Castillo Not sure if this simple example really answer the queries for a 5-input, 1-output system. He...

4 years ago | 1

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having trouble optimizing a NPV
Hi @jxl The function tsk(r) seems to be converging asymptotically to zero as . r = linspace(0, 1000, 10001); plot(r, tsk(r)),...

4 years ago | 0

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how to plot a periodic function fro negative to positive?
Hi @Daniel Niu Are you looking for this? Edit: Made changes as per shown in your diagram. Because the amplitude is unknown, th...

4 years ago | 1

Answered
How to plot function f(x,y,z)=c ?
@Duong Nguyen Not how it looks. Are you expecting something like this? c = pi/2; z = @(x, y) acos(c - cos(x) + cos(y)); fsur...

4 years ago | 0

Answered
I'm not getting the correct result for the u, i want it in degree but the ans is not right, the plot is not smooth.
To understand why it is not smooth, you need to see what causes the singularity (division-by-zero) at around . ni = 1; nt = 1....

4 years ago | 0

Answered
function that applies the parabolic interpolation method
Hi @Miftahul Jannah, Can you provide the parabolicmin.m file? help parabolicmin By the way, you should be able to visually de...

4 years ago | 1

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