Control design and simulation toolkit

Hello everyone,
Does anybody know if indexing is possible in a Control and Simulation loop in Labview? I need to save in an array all the simulation data.
Thanks,
Ussr123.
Solved!
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Solved: the necessary icon is called: Collector.

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Control design and simulation palette

Hi all
I've recently installed LV 8.2 professional edition on my PC.
Watching the function palette i've seen the sub-palette 'Control design and simulation' empty... Is it normal? Do i need some toolkit to see something in it?
King regards
I love the smell of napalm in the morning

alij wrote:
its because the main labview is install in c:\program files , but when you install the module it will install in programfiles(x86) ,that because the **bleep**ing bug in the installation and programmers , plz fixx this , i think you have to copy paste files into the main NI labview which is in program files not program files (x86)...
If LabVIEW is installed in "c:\program files", it means that you installed LabVIEW 64bit. You should install LabVIEW 32bit, which will go to "c:\program files(x86)" and will be compatible with your toolkit.
There is nothing wrong with the installer. You simply picked the wrong product.
Do NOT copy files between the two mentioned folders. One is for 32bit applications and one is for 64bit applications (assuming you have a 64bit OS).
The toolkit is not compatible with 64bit LabVIEW (Details).
LabVIEW Champion . Do more with less code and in less time .

Control Design and Simulation and DAQ

I'm learning Control Design and Simulations. I have some questions about it.
1. For System Identification use, we can find the transfer function/model of the system by feeding data measurement from the system. But, how long data do we need to be sufficent for Identification System to estimate the model? Until the get saturated value (steady state)? or any other intervals? What if the system is unstable? How will Identification System Toolkit estimate that case?
2. For connecting to hardware, we just connect the clock in the simulation loop to the hardware? And the simulation loop will simulate the blocks inside once it got the trigger/data from the DAQ? what about the step time and solver? Do they follow the timing from hardware? or they will run on their own supplied values/clock?if we use USB DAQ, we can't have any clock from it (as far as I know it's because USB connection is not that stable for clocking since it might be any jitters or delays.) So, how do we configure the timing parameter for USB DAQ?
3. There is possibility to convert model in transfer function to state space, how do we know the states inside that conversion?
Any helps would be great...
Thanks in advance...

Dear Chin ho,
After going through your questions I found some documentation which will be useful for you. But I you still have more questions, you can reply me any time.
1- About the data and amount of it I couldn't find any info but maybe you can use the new functions in LV version 2009 and find your answer.
Estimating States of Nonlinear Stochastic State-Space Models with Extended Kalman Filters
In previous versions of the LabVIEW Control Design and Simulation Module, you can use the Discrete Kalman Filter function and the Continuous Kalman Filter function to estimate the states of a linear discrete or linear continuous stochastic state-space model, respectively. In the LabVIEW 2009 Control Design and Simulation Module, you can use the Continuous Extended Kalman Filter function and the Discrete Extended Kalman Filter function to estimate the states of a nonlinear continuous or a nonlinear discrete stochastic state-space model, respectively.
The Continuous Extended Kalman Filter function and the Discrete Extended Kalman Filter function estimate model states of a partially observable plant based on noisy measurements. First, use the SIM Discrete Nonlinear Plant Model template VI or the SIM Continuous Nonlinear Plant Model template VI, located in the labview\templates\Control and Simulation directory, to define the system model. Then use the the Discrete Nonlinear Noisy Plant function or the Continuous Nonlinear Noisy Plant function to simulate the discrete or continuous nonlinear model, respectively, with the addition of noise. Finally, use the Continuous Extended Kalman Filter function or the Discrete Extended Kalman Filter function to estimate the states of your model.
The Continuous Extended Kalman Filter function and the Discrete Extended Kalman Filter function linearize the nonlinear system either by calculating a Jacobian matrix internally or by using an external Jacobian matrix that you define. Use the SIM Continuous Jacobians template VI or the SIM Discrete Jacobians template VI, located in the labview\templates\Control and Simulation directory, to define an external Jacobian matrix.
Refer to the LabVIEW Control Design User Manual, accessible by navigating to the labview\manuals directory and opening CD_User_Manual.pdf, for more information about estimating the states of nonlinear stochastic state-space models with extended Kalman filters.
2- I think that I found a pdf document about this part of your question which will be helpful. If you would like to give your email address, I can send it to you.
3- About this part you can check the help function in LabVIEW when you open the "CD Convert Transfer function To State-space" function in your front panel.
I pasted some info about the mathematic part below.
The LabVIEW Control Design and Simulation Module provides tools to study the dynamics of systems described by linear time-invariant (LTI) continuous and discrete models. You can create deterministic state-space, transfer function, and zero-pole-gain models. You also can create stochastic state-space models and the second-order statistics noise models. You can use these forms to describe both single-input single-output (SISO) and multiple-input multiple-output (MIMO) systems.
Continuous transfer function and zero-pole-gain models use the s variable to define time, whereas discrete transfer function and zero-pole-gain models use the z variable to define time. Continuous state-space models use the t variable to define time, whereas discrete state-space models use the k variable to define time.
Deterministic State-Space Model
Continuous
x(t) = Ax("t) + Bu(t)
y(t) = Cx(t) + Du(t)
Discrete
x(k + 1) = Ax(k) + Bu(k)
y(k) = Cx(k) + Du(k)
Stochastic State-Space Model
Continuous
x(t) = Ax(t) + Bu(t) + Gw(t)
y(t) = Cx(t) + Du(t) + Hw(t) + v(t)
Discrete
x(k + 1) = Ax(k) + Bu(k) + Gw(k)
y(k) = Cx(k) + Du(k) + Hw(k) + v(k)
Second-Order Statistics Noise Model
Q = E{w . wT} – E{w} . ET{w}
R = E{v . vT} – E{v} . ET{v}
N = E{w . vT} – E{w} . ET{v}
where
t is continuous time.
k is the model sampling time multiplied by the discrete time step, where the discrete time step equals 0, 1, 2, …
x is the model state vector.
u is the model input vector.
y is the model output vector.
w is the process noise vector.
v is the measurement noise vector.
A is an n × n state matrix of the given model.
B is an n × m input matrix of the given model.
C is an r × n output matrix of the given model.
D is an r × m direct transmission matrix of the given model.
n is the number of model states.
m is the number of model inputs.
r is the number of model outputs.
G is a matrix relating w to the model states.
H is a matrix relating w to the model outputs.
Q is the auto-covariance matrix of w.
R is the auto-covariance matrix of v.
N is the cross-covariance matrix between w and v.
E{} denotes the expected value or the mean of the enclosed term(s).

Control design and simulation module

Hi,
I am new to Labview and i am trying to work on Control System design. I have downloaded and installed the Evaluation Module of Control Design and Simulation Module. The problem I am facing witht this is its not showing any control fuctions in functions Palette. While installing it said its installing only control design and simulation assistant. Please, can anyone help with this.
I am actually looking at this module to implement Sliding mode control for non linear systems. I would like to know if there are any examples to implement this??
Thank You.

Hello
The problem is the following. The version of LabVIEW that you are using does not match the version of the evaluation version of LabVIEW Control Design and Simulation Module (CD&SIM). If that happens, the installer will not select the support files for your LabVIEW. If you download LabVIEW 2011, then you must install CD&SIM 2011.
Now, the module in the current version does not have an example with sliding mode control. But using this module, you can easily implement the algorithms and simulation its result using the Control and Simulation Loop.
Hope this helps.
Barp - Control and Simulation Group - LabVIEW R&D - National Instruments

Control Design and Simulation Tutorial

Hi
I'm starting off with a coursework which requires use of the Control Design and Simulation functions. Before I ask any silly questions i'd like to see the hand on tutorial, it's referenced in this white paper.
http://www.ni.com/white-paper/5855/en/
However the ftp link to the tutorial doesn't work, does anyone else have an alternative link, or could supply the tutorial directly.
I appreciate any assistance.
Kind Regards
Danny
Solved!
Go to Solution.

Hmm, thanks. It must've been the proxy server in the office. Disabled and it downloaded it via the wifi.
Thanks

Control Design and Simulation palette doesn't appear

I'm using LabVIEW 2009 in Professional License. I've installed Control Design and Simulation Module with its all other required Toolkits. The problem is that Control Design and Simulation palette doesn't appear in the Functions Palette in any VI. Please help me with that.
Adeel Amin
NED University of Engineering & Technology
Solved!
Go to Solution.

If you run NI License Manager, Expand LabVIEW2009>Modules>Control Design and Simulation.Can you verify that you have that directory and what is the color of the cube right next to it?
Andy Chang
National Instruments
LabVIEW Control Design and Simulation

Control, design and simulation

Hello everybody,
I am trying to run a simulation in Control Design and Simulation module. My simulation consists of various simulation systems. The subsystems are working as desired when run as separate units, but when I run the complete system, the subsystems fail to produce the output values.
I have not used any local variables or any discrete function vi inside a subsystem.
Where am I wrong ? Any help would be much appreciated.

I mean the indicators connected to various subsystems are inactive and don't produce any output values. I tried to find the error using the Error Cluster, but it didn't show any error. I am using LabVIEW 2011. I have attached the complete system including the subsystems. The individual systems are working fine. I changed the solver too, but the problem persisted. Please try to identify the error.
Barp wrote:
When you say: Fail to produce a output, what do you mean?
On the right side of the Control and Simulation loop you have the 'Error Out' cluster. Create a control from it and see if you have an error. Also, which version of LabVIEW are you using?
If this is not producing an error, then try to change the solver you are using. It would help if you could post your code (or at least pictures) of it.
Attachments:
Wind Turbine Integrated.7z ‏2240 KB

No lo puedo instalar labview 2011 Control Design and Simulation

no e podido encontrar la verision para instalarlo agradezco si alguien me puede ayudar y guiar en la instalacion

Hola, [email protected]
Gracias por utilizar los foros de discusión, en el siguiente link puedes descargar el módulo LabVIEW Control Design and Simulation 2011.
www.ni.com/download/labview-control-design-and-simulation-module-2011/2554/en/
¡Saludos!
David P.
National Instruments
Ingeniería de Aplicaciones
www.ni.com/soporte
David P.
National Instruments
Applications Engineer
www.ni.com/soporte

LabVIEW Control Design and Simulation Module version 2013

I have had Labview downloaded for quite some time now. Downloaded control design and simulation module. Installed it. When i go to use it in the
functions menu, only the window appears. Opening it shows an empty window. I have attached a screenshot of the issue. Could someone please explain to me what the problem is and how I can go about fixing it?
Attachments:
Labview screenshot.docx ‏998 KB

As Altenback said, It is very possible it expired or it needs activation. To see for sure, go to your "NI License Manager" and expand the Modules. you should see:
If not green then you have to fix the license.
Barp - Control and Simulation Group - LabVIEW R&D - National Instruments

How to reset indicators in a control design and simulation loop before each run?

Hi,
I am new to Labview. I have tried using property node to reset indicators before each run. But since it is in a simulation loop, it gets resetted many times. I am primarily interested in resetting only before each run.
Any hint will be of great help.
Thank you!
Regards,
Divya

Hi Divya,
This KnowledgeBase article describes 2 methods for resetting your Front Panel programmatically:
http://digital.ni.com/public.nsf/allkb/08E7DDAE66A7D02C86256DDA00630E75
However if you have tried these methods, and are still not getting the behaviour you want, it would be easier to help if you could post your code (or even a screen shot of the section of code where you're trying to reset your values)

Control and Simulation toolkit

Hi everyone,
I added a few screenshots of a simple PID feedback system. I programmed it twice with different blocks but I am not getting the same results. Can anyone spot the cause?
Thanks in advance
Attachments:
labview1.JPG ‏66 KB
labview2.JPG ‏174 KB

Hello KF2,
First:
I had indeed overlooked the link between front panel and block diagram.
I was a bit too fast and that's my fault..
I always find it difficult to troubleshoot code without the code.
For completeness:
I did see the "teller" and the "noemer" you specified (I'm Dutch speaking so that part seems "normal" to me).
But what still stumbles me is that all the PID parameters seem to be 1.
I don't directly see any practical case where this would be like that.
How did you define/calculate Ti,Td,Kd,Ki,Kp ?
If you can share the VI, then I'll do some tests at my side.
It's always easier to test code when you have it available
Also, the utmost right part seems to be missing in the screenshot of the BD.
I'm especially curious to see which discrete TF you have at the output of the Academic PID VI and .
I thought (at first glance) that you had shown that comparison in the block diagram/FP.
My first guess would be that something has gone wrong in the crossing between different "domains" (eg. Laplace TF vs discrete TF),
but I would need to test the code to be sure about this.
Kind Regards,
Thierry C - Applications Engineering Specialist Northern European Region - National Instruments
CLD, CTA
If someone helped you, let them know. Mark as solved and/or give a kudo.

Grid control design and agent deployment

To give you a brief overview of the setup here, it is currently an agent per instance instead of an agent per host. This was done to allow an agent to be moved along with an instance to another host in a cluster (we are using IBM AIX LPAR, and Sun Clustering) thereby allowing a seamless transition between hosts and history retention for the instance. We would like to change this to an agent per host, however, we need to keep the historical information of the instance should it change hosts. So my questions are:
1. Is it possible using some sort of script or process to have an instance/target move between hosts and retain its previous historical information?
2. Is it possible to have a single, summarized availability report for all instances? The report per instance works, however, doing a single summary report for all instances does not display the correct information (it only shows PIT, i.e. the current state of the instances not historical over x period of time).
Any help is appreciated.
Thanks.

Let me provide some details as to the environment as to the deployment which I am doing in a HA environment:
- There is a physical 'myhost1' with virtual hosts names oradev1, oratst1. Note I am not referring to virtual machines, just virtual host names, or virtual IP.
- Each VIP hosts a listener and database instance. For example, oradev1 -> lsnr-oradev1 + orad1, and oratst1 -> lsnr-oratst1 + orat1
In this design each database and listener can be moved to another physical host separate from the other, say the entire oradev1 stack moves to 'myhost2'.
How would the agents be deployed in such a design? I think an agent per physical host, with the VIP used to monitor the virtual stacks, such has as each virtual host containing the listener and database instance. This way when a virtual stack moves we can just switch the agent monitoring that stack to the new host and retain the history of the targets.
Is my thinking correct? Is there a better way to retain the history when moving the virtual stacks perhaps doing an agent per instance instead of physical target?
I hope this provides more details. Thanks.

No icon in the control and simulation palette, toolkit is instaled

only question marks on the palette

Hi Adj;
Do you have more information on the LabVIEW and the control design and simulation toolkit you are using?
Here is a document that solves that issue for LabVIEW 8.2 and Control Design and Simulation Toolkit 2.1.1:
http://digital.ni.com/public.nsf/allkb/57E03AEB671A6D9F8625725A0079E37F?OpenDocument
I hope the information is useful
Good Luck!
Francisco Arellano
National Instruments Mexico
Field Systems Engineer - Energy Segment
www.ni.com/soporte

Mimo simulation in Control Design & simulation toolbox

Hi,
I am running is simulation with MIMO system represented as state space in control design and simulation toolkit. I see that I am not able to give vector with 2 inputs to the MIMO model. By default state space is represented by a SISO model. Can anybody guide how can one give two inputs to the state space model and run it as a MIMO system.
Thanks and best regards,
Amit Kalyani

You should be able to double click on the State-Space VI which will bring up State-Space Configuration Dialog Window. You will be able to use the drop down Polymorphic instance to selec a MIMO system. Or another way of doing this is to change the parameter source to Terminal, then wire in your MIMO model directly.
Andy Chang
National Instruments
LabVIEW Control Design and Simulation

Can't install Control and Simulation Module in LABVIEW2009

HI all,
I m using LABVIEW2009 x64 and wanted to update control module in it.
when ever I try to install the Control DEsign and Simulation module, the setup won't proceed.
IT shows the following error message :
NI LabVIEW 2009 Control Design and Simulation Module
The Control Design and Simulation Module requires LabVIEW 2009 Full or Professional Development System to be installed.
however, I have already installed and reinstalled once as well. Please help me.

Hi Rishabh,
Unfortunately, we do not have a version of Control Design and Simulation for x64. You can try to install the 32-bit version of LabVIEW instead on a 64-bit OS. This should allow you to install CD&SIM.
Please let me know if can help any further.
Barp - Control and Simulation Group - LabVIEW R&D - National Instruments

Control design and simulation toolkit

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