Answered
design optimization Simulink model parameter estimation to fit measured curvedata
Please start by taking a look at <http://www.mathworks.com/videos/estimating-dc-motor-parameters-97057.html the video> and readi...

8 years ago | 1

Answered
Updates of Matlab toolboxes based on latest Academic Research findings (Sys Id Toolbox)
Hi, As pointed out in the previous answer, each release we publish information about new features added to each of our products...

8 years ago | 0

Answered
How to do stability analysis of a MIMO simulink model?
You can use Linear Analysis tool in Simulink Control Design to compute a transfer function of a model (linearize the model). Tak...

8 years ago | 0

Answered
How do I tune all the 4 PI controllers of a STATCOM?
You can try using <http://www.mathworks.com/help/robust/tuning-with-control-system-tuner-app.html Control System Tuner> which ca...

8 years ago | 1

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Answered
I want to know the region of PID tuner
The PID Tuner considers as the plant all blocks in the loop between the PID Controller block output and input. See <http://w...

8 years ago | 0

Answered
How to tune PID using PID tuner app if output data are n
Can you try resampling your data at one sample rate?

8 years ago | 0

Answered
How can i exract transfer fuction of my nonlinear real system?
Can you "break" the control system and put some test signals through your motor - steps, chirps, sine waves, etc? If you can ...

8 years ago | 0

Answered
Linearization error in PID controller block
Please do not post the same question multiple times. Also, can you be more specific about the error you are getting. hard to hel...

8 years ago | 0

Answered
How would you design a PID controller to stabilize a 4th order system?
Some plants just cannot be controlled with a PID controller. In that case you need to look at other types of control. You can ...

8 years ago | 0

Answered
Auto tuning PID algorithm in Simulink
See the doc <http://www.mathworks.com/help/slcontrol/ug/pid-tuning-algorithm.html here> .

8 years ago | 0

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Answered
transfer function=1/2s^3+3s^2+s,draw the nyquist plot .i have not get the same plot which i have studied.
In your plot the half circle (from -0 to +0) has infinite magnitude, because your system has a pole at zero. nyquist plot cre...

9 years ago | 1

Solved

Produce a cosine wave
Produce the following signal: <<http://blogs.mathworks.com/images/seth/cody/cosine-eqn.png>>

9 years ago

Answered
How do I get the DC motor model to match real world
You can try using Simulink Design Optimization to automatically estimate model parameters to match both measured voltage and cur...

9 years ago | 0

Answered
transfer function=1/2s^3+3s^2+s,draw the nyquist plot .i have not get the same plot which i have studied.
Can you attach the plot you expected to see?

9 years ago | 0

Answered
Is it possible to interface flightgear 3.4 with matlab 2013a
Support for interfacing with FlightGear 3.4 was added in 15b, so that's why you are seeing issues in 13a.

9 years ago | 0

Answered
System Identification tool "OE, tfest" question
<http://www.diva-portal.org/smash/get/diva2:316884/FULLTEXT01.pdf This paper by Lennart Ljung> might be helpful.It pretty much a...

9 years ago | 0

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Answered
Neural Network Predictive Controller Design without the plant model but with historical data.
This is applicable to all control design problems in general: if you have plant input-output data and want to create a plant mod...

9 years ago | 0

Answered
Simulink PID controller apparently doing nothing
I cannot reproduce this behavior. When I run your setup, I definitely see closed-loop response getting to 1 in steady-state. May...

9 years ago | 0

Answered
Why is the error of the close loop PID max of 1? File is provided.. please help
The max error is always one because at time 0, when you command the reference to step from 0 to 1, your plant model is initializ...

9 years ago | 0

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Answered
how to apply a pwm signal to dc servo motor using pid controller?
<http://www.mathworks.com/discovery/pulse-width-modulation.html This page with resources on pwm> should be helpful. It includes ...

9 years ago | 0

Answered
Transfert function with System identification toolbox
There are a few issues here. 1. Your data (Amp, Pha) does not agree with closed form transfer function at low frequencies, be...

9 years ago | 1

Answered
Using the Recursive Polynomial Model Estimator for online estimation
I don't think you can expect to get the exact a,b,c,d matrices you start from. The model is estimating system dynamics, and ther...

9 years ago | 0

Answered
Representing controller in z-domain and plant in continuous domain
Simulink model should not be creating any errors if you are combining continuous and discrete blocks. Here is a model with a si...

9 years ago | 1

Question

What is Missing from Fuzzy Logic Toolbox?
What should MathWorks add to Fuzzy Logic Toolbox? What features would be useful to you?

9 years ago | 1 answer | 2

1

answer

Answered
Why cant i tune this simple electrical system? "The plant model in the PID loop linearizes to zero" Please help!!!!!!!!!!!!!!!!!!!!!!!!!!!
See <http://www.mathworks.com/help/slcontrol/ug/troubleshooting-automatic-pid-tuning.html#btt7pgj here> .

9 years ago | 0

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Answered
how to write a matlab coding for position and velocity algorithm for a digital pid controller
http://www.mathworks.com/matlabcentral/answers/6200-tutorial-how-to-ask-a-question-on-answers-and-get-a-fast-answer

9 years ago | 0

Answered
How to tune PID for a Output(t) = k*Input(t) system?
Plant model does not have an integrator in it, so you need an integral term to achieve zero steady-state error. In other words,...

9 years ago | 0

Answered
Tuning PID - I tune the PID the first time and adjust a few things, but when I want to adjust the PID later it says "The plant model in the PID loop linearizes to zero, and therefore cannot be used in PID controller design."
Hi, Here is the <http://www.mathworks.com/help/slcontrol/ug/troubleshooting-automatic-pid-tuning.html#btt7pgj doc section> that...

9 years ago | 0

Answered
Obtaining a transfer function from tfestimate
Hi, If you have access to System Identification Toolbox, you could use it to estimate a transfer function that you can use fo...

9 years ago | 1

Answered
PID GImbal 2 Axis Simulation
I suggest you start by checking out some of the already existing resources, such as <http://www.mathworks.com/discovery/pid-cont...

9 years ago | 0