Questions on the use of Mathematica to analyze, design, and simulate continuous- and discrete-time control systems.
4
votes
1answer
84 views
Problems with RootLocusPlot
I am having some trouble to understand how the RootLocusPlot works (options, drawing and etc.)
Here is an example
...
0
votes
0answers
71 views
Why is PhaseMargins going nuts? [closed]
I have a transfer function:
Gs = TransferFunctionModel[10/((s + 1) (s - 1) (s + 9)), s]
I made a Nyquist plot and it looks like what I expect.
Gain margin ...
10
votes
1answer
183 views
Simulating discrete time stochastic dynamic systems
What is the canonical way of simulating discrete time stochastic dynamical systems in Mathematica using the new functionality of Random processes?
To take a concrete example, lets consider the ...
2
votes
0answers
109 views
Kalman filter by hand
I am now learning the Kalman filter and wants to implement it by hand to understand it better. To be specific I want to first simulate a sequence of data by
$$
\dot x=Ax+Bw\\
y=Cx+Dv,\\
...
2
votes
2answers
192 views
Using transfer function model to generate state space model
I am trying to generate the state space model for the following system:
However, the following code does not generate the state space model I expect:
...
5
votes
1answer
290 views
Does Mathematica solve transfer functions differently to Matlab?
Please note this is an edit to the same question posed a few weeks back:
I'm using Mathematica to derive the transfer functions for a three phase AC/DC inverter.
Given below is the code for the ...
4
votes
1answer
161 views
Using the LQGRegulator to build a human operator model
I'm trying to build a human operator model using an optimal control model in Mathematica:
The vehicle dynamics are given by
...
1
vote
1answer
230 views
BodePlot Phase disagrees with convention. How do I make it agree? [closed]
This question is similar to a previous question, but I did not find an adequate answer there.
If I type in the command BodePlot[1/(s^2)] I get a horizontal line ...
2
votes
3answers
184 views
Strange behaviour of OutputResponse
I am having some trouble when using OutputResponse. For instance consider the following command
...
3
votes
1answer
165 views
How to adjust the parameters on a Nyquist Plot?
In order to see some details on a Nyquist Diagram I have used the function NyquistPlot that comes with Mathematica v8 and v9.
...
6
votes
1answer
160 views
How to convert a transfer function model to a zero-pole-gain model?
Mathematica has a function to convert TransferFunctionModels to StateSpaceModels:
...
7
votes
1answer
147 views
How do you use SystemsModelFeedbackConnect?
I'm trying to grasp the new control system functions in Mathematica 8. I'd like to connect a controller model to a model of a plant to simulate the behavior of the system.
I define a simple servo ...
