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**Feeds**

Inverse model for feedforward control

Hi @Martin In my previous Answer, I used to Transfer Function (frequency version) to describe the process plant. I have revisit...

3 days ago | 0

| accepted

Inverse model for feedforward control

Hi @Martin Thanks for your feedback in the comment. The provided first-order ODE: , suggests that the "pure" feedforward cont...

3 days ago | 0

how can I get the transfer function of this equation using Matlab: dy/dx + K*sqrt(y)-C =0

Hi @Reuel The square root is a nonlinear term in the system, making the Coupled Tank System nonlinear. Consequently, the transf...

5 days ago | 0

| accepted

Inverse model for feedforward control

Hi @Martin As the target trajectory contains frequency components, a factor of 600, rather than 6, must be employed in this sec...

5 days ago | 0

Simulink model doesn't oscillate

Hi @Andrei Rotaru According to the principle of Occam's Razor, the most likely explanation for the lack of oscillation in the a...

6 days ago | 1

| accepted

Cannot solve algebraic loop involving

% Derivative of state '1' in block 'NAM_Mo_phong_xe/Equation1_ddgama1/Integrator' at time % 0.0030900000000000003 is not finit...

6 days ago | 0

Edit poles and zeros in root locus design editor or bode editor

Hi @Nandhini I prefer mathematical model-based design by formulas that satisfies certain stability properties and achieves spec...

6 days ago | 0

Inverse model for feedforward control

Hi @Martin Transfer function: Math model in continuous-time: This linear 1st-order ODE is 100% solvable and the ideal fee...

6 days ago | 1

One function is greater than other

Hi @Fatima Majeed The search below covers this range . z = linspace(0, exp(1), 3001); fun = @(z) z - 8.02*log(z) - (3.359/2...

6 days ago | 0

Attempt to plot an piecewise function

S = @(x) ( (x <= -2) ) .* 0 + ... ( (x > -2) & (x <= -1) ) .* (1/4 * (2 + x).^3) + ... ( (x > -1) & (x <= 0...

8 days ago | 0

| accepted

How to solve a system of nonlinear differential equation that follows some pattern

Hi @MADHAN The looping approach is given as follows: %% for-loop approach function dx = ode1(t, x, n) dx = zeros(n,...

10 days ago | 0

Fuzzy control problem: input 2 expects a value in range [-50 50], but has a value of 1035.94

Hi Rafi, Based on your Simulink model, Input 2 refers to the time derivative of the error signal. In the fuzzy system, you ha...

15 days ago | 0

Plotting Phase Portrait of Duffing Equation

Hi @Athanasios Paraskevopoulos This method utilizes the 'arrow()' function, which was created by Professor @Erik Johnson. You c...

23 days ago | 3

| accepted

The solution to the delayed differential equations using the code dde23 represents the solution by the third order Runge-Kutta method or what?

Hi @mohammed, Your guess is correct. If you click on the link to the dde23's Algorithm section, you will find that it states "d...

23 days ago | 0

| accepted

Error using FuzzyInferenceSystem/addOutput (line 866) Upper range value for variable must be greater than lower range value. Error in rulepruning (line 24) fis = addOutput(fi

Hi @Michael Bamidele The syntax to add output membership functions is incorrect. Use 'addMF()' instead. However, it is highly r...

24 days ago | 1

| accepted

Using state space in simulink

Hi @Marina Since you know the initial output value, the idea is to convert the Identified State-Space to an equivalent Canonica...

25 days ago | 0

PID controller tuning for time-varying input

Hi @AleF Without more context about the specific system you are trying to control, it is difficult for us to provide targeted r...

26 days ago | 0

How can I divide by the function variable in a Simulink equation?

Hi @Louis In the 2nd-order ODE, the independent variable 'r' can represent the radius of the system or another relevant paramet...

26 days ago | 0

| accepted

In this work, I am trying to connect two systems by injecting a delayed wave of the first system into the second system. In this system, there are several problems, including:

Hi @mohammed Both @Torsten and I have been trying to understand the problem you are attempting to solve. However, it appears th...

27 days ago | 0

エンジントルクの求め方

Dear @雄祐 三浦-san The formula to calculate the torque produced by the engine in this specific example, is given in Equation 4, as...

27 days ago | 0

In this work, I am trying to connect two systems by injecting a delayed wave of the first system into the second system. In this system, there are several problems, including:

Hi @mohammed Based on the information you have provided, it appears the two systems could potentially be combined and then solv...

27 days ago | 0

| accepted

Enforce Kinematic Constraint in Initial Value Problem ode45()

Hi @Jonathan Frutschy Visualizing a system with 600 masses can be challenging. However, I believe the kinematic constraint for ...

27 days ago | 0

| accepted

tuning model predictive controller

Hi @Mounira This is often a problem where designers begin with what they are trying to end with. Similar to some LQR practition...

28 days ago | 0

| accepted

I'm trying to solve two separate systems using ODE23 while controlling the number of indexes so that the indexes are equal for both systems, but I couldn't. Can you help? Than

Hi @mohammed Please review if this approach is accceptable. tspan = linspace(0, 5, 251); opt = odeset('RelTol',1e-3);...

29 days ago | 0

| accepted

Solve an ODE with the parameters defined in the function changing in a for loop in the main script

Hi @Paolo Trenta Let me know if the looping approach I provided is helpful. By the way, your original proportional-only control...

29 days ago | 1

| accepted

How i use break in continues data in couple differential? it is possible?

Hi @cindyawati cindyawati Please review the plots and verify if the microglia and the drugs are correctly injected in your Drug...

29 days ago | 0

| accepted

Ziegler Nichols PID Method

Hi @LORIS IACOBAN I revisit your problem. I'm unsure if you are looking for something like this: %% original system (marginall...

30 days ago | 0

HOW TO CREATE TSUNAMI MODEL

Hi @Fadilla Neisa Looking for this? %% Tsunami model syms L H depthratio g positive syms x t w T R U(x) L1 =...

1 month ago | 0

Fuzzy control problem:(1)input 2 expects a value in range [-1.5 1.5], but has a value of 4.36559e+24;

Hi @柯 This following issue does not affect the original "derivative kick" problem described in this thread. So, it should be tr...

1 month ago | 0

Transfer function derviation for a system

Hi @DP From the differential equation, it can be rearranged to have the control term and the disturbance term. In state-...

1 month ago | 0