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Analyzing and developing PID control for a 5th order system
Hi @Niel The characteristic polynomial of the 5th-order plant has zero coefficients for the terms , , and . The configuration o...

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QFT ( Quantitative Feedback Theory) Controller
Hi @osama If you are referring to the original QFT Toolbox developed by Craig Borghesani, the founder of Terasoft, and previous...

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How can I place a linear regression line (line of best fit) through both plots in this code, but only from the halfway point to the end?
Hi @ryan In purely math terms, do you mean to find the tangent line at the midpoint of the decaying beta curve? If so, I used m...

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How to design the MPC controller based on the plant model. I want to use it for the adaptive control for motor control. How it will react?
Hi @Ancy Princia There are numerous codes available in the documentation of the Model Predictive Control Toolbox. You should fi...

10 meses hace | 1

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S curve ramp function
Hi @David Cole In addition to your user inputs (Vin, accel, and jerk), you also need to provide the "Jerk On" time. You can u...

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S curve ramp function
This might not be what PLC users like to do. %% 99% Math-free Jerk-based Velocity % parameter c = 1e-3; ...

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Break in and break away points on Root Locus
Hi @Niel Previously in this post, it was shown that we must at least place a compensating pole at the origin so that the root l...

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Break in and break away points on Root Locus
Hi @Niel The reason is simply that the locus never intersects the 0.59 damping ratio grid line, regardless of how the feedback ...

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I want to build a double pendulum system in Simulink but am getting errors relating to the tolerance and step size
Hi @Jishnu After reviewing the block diagram, if you feed the signals and (before the integrators) back into their respectiv...

10 meses hace | 1

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Constraints to a Second Order Curve Fit
This is merely a workaround that involves manually forcing the sign of the leading coefficient to be smallest positive. It does ...

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Please help to identify this Simscape component
Since the block is connected to the scope with the label 'Output Current', it is certainly related to the measurement of the cur...

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Rotary Inverted Pendulum State Space Model PID Cascade Control
Hi @Davide If you examine the transfer function from control input to θ, you will observe that it is a 4th-order function, wit...

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Can I use "place" function to adaptively update controller gain K when running model in Simulink?
Hi @Quang Manh If the place() function is not supported for code generation, you will need to program the computation manually....

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What are the signs that my parameter estimator is on the right track before convergence?
Hi @YASSER In MATLAB, a 'NaN' result is primarily produced when there are indeterminate operations, such as Inf/Inf or 0/0. A s...

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Understanding continuous integrator blocks in Simulink
Hi @C I don't what is the mathematical 'C' function in your differential equation. If the derivative function is unavailable, b...

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Problem with ramp change in waveforms
You can force the signal to 'jump' instantly at the point of discontinuity by using the sign function.

11 meses hace | 0

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I am trying to incorporate multiple IF statements in my ODE to generate a single output.
Hi @Christopher Based on your definitions of the four cases in this comment and @Walter Roberson's input, we can run the simula...

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I haven't defined syms x but solve function gives me values depend on x
Hi @Cahit Semih Do you have any updates regarding your optimization efforts? The following solution is derived from your eigen...

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how to repeat a code until a certain input has been recieved
Hi @zach Here is a simple example estimate the value of using the while loop to infinitely repeat the execution of instruction...

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How does the expfit function... functions
This is most likely because the expfit() function does not belong to the Curve Fitting Toolbox. Furthermore, the function is mor...

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Fuzzy Logic Controller Block in Simulink Doesn't Show Two Inputs
Hi @ali If there is more than one input, you need to use the Mux block to combine the input signals into a virtual signal vecto...

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Can MATLAB handle Fuzzy Derivatives and plotting in Fuzzy Logic contexts?
Hi @salim You can certainly recommend the Fuzzy Logic Toolbox to your friend. However, the toolbox is primarily focused on the ...

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Tips for solving Matrix/Linear Algebra Problems with matlab
Hi @Annie RLC Circuit analysis typically involves a dynamic system. Thus, you will need to model it in the form of a differenti...

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given the function f(x)=X^3 - 6X^2+9X. Find the first derivative of the function of f(x)
You can use the first derivative formula from Larson/Edwards Calculus of a Single Variable textbook. For more info, please look...

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How to create .fis file with 2042 numerical values as input for a fuzzy system
Hi @karthika gurusamy A FIS file (*.fis) can only be created when saving the fuzzy inference system (FIS) object to the current...

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What should I do if I get "Error: Invalid FIS. PARAMS field of constant output MF must contain a scalar"
Hi @Nithya Kancherla and @Iman Ansari The conclusion part of the Sugeno If–Then inference does not have the typical output memb...

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What should I do if I get "Error: Specified FIS file contains invalid type-1 membership function"
Hi @alper demir This error most likely indicates that your FIS file may have been corrupted for an unknown reason when the modi...

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What should I do if I get "Error in ruleview"
This error most likely indicates that your fuzzy system is either incorrectly designed or may have been corrupted due to incorre...

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How to design a Fuzzy System for the Fuzzy Relation (A∪C)∩(B∪D)
Hi @Johnson Obari The response is a bit late, but this is an interesting problem. If you use three fuzzy sets for each of the f...

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I am having trouble getting the engine speed to 0 rpm when simulating a series hybrid vehicle controller.
Hi @Thang The Simulink file contains many components, including blocks from Stateflow and Simscape. Could you provide the same ...

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