Model of level control design

can anybody help me in making the model of water level control in the labview platform.
THANKS
ranita
Solved!
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Thank you sir,can any other hint on making the model of level control you can suggest.
With regards
ranita

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Manual Audio Level Controls! - Sony Alpha DSLRS (A65)

Dear Sony -I absolutely love your DSLRs. However, to use the camera as an acceptable tool for amateur/indie/professional film, manual audio level controls in video mode are a must-have. Equal Canon competitors all feature this simple leveling option for managing audio.Currently, the automatic gain control is the only option for audio recording capabilities on Sony Alpha DSLRS in video recording. While in theory OK, AGC leads to terrible problems such as unnecessarily high and distracting background noise/hiss. Filmmakers desire crisp, clear audio!For quality results using an external microhpone, manual audio levels are the only way for filmmakers to achieve decent in-camera audio to compete with Canon users. Many amateur and professional videographers are in desperate need of this function! Audio is often MORE important than the image quality of your film, although Sony seems to increasingly neglect its video DSLR users by not implementing this ability and falling short on video options (Auto-focus in Manual Mode, audio levels on HUD etc.).To keep my Sony A65 a viable option for video work - please see if anything can be done! (Should be able to be added with a firmware update to all current and existing Alpha DSLRS) Thanks!!! - Love, a filmmaker who would desperately like to keep their A65 for professional video work! (Also from "Join The Inspiration")

Though a great idea, you also have to understand that the a65 isn't as film oriented camera like other cameras.
DSLR cameras with the audio controls are designed with film making in mind, thus they have that option.
Most DSLRs (at least, back in the days) was simply a camera to take photos. If you wanted to do film, you'd buy a dedicated film recorder for that. Having video capabilities in a DSLR was a bonus.
Nowadays, it's merging, bang for buck, reaching to a boarder audience, one size fits all, etc, and unfortunately, the a65 wasn't part of that 'nowadays' era.
The a99 and a77ii, if I remember correctly, has audio controls.
A lot of the newer Sony models (mirrorless) also have audio controls, that is, the ones that a targeted towards film making and not just great photos with the bonus of great video.
Also, I would presume that a lot of 'professional' videographers will either use external mics such as on a pole, a lapel mic, etc, to capture perfect audio, or if not, at least a shotgun/boom mic attached to the camera.
When doing such, there technically shouldn't be a lot of problems with the audio quality. Of course, if those external mics are still recorded into the camera, then yeah... but if they're recorded separately and slapped on during post processing... shouldn't be any problems...
If you're relying purely on the a65 and it's AGC, then there definitely will be shortcomings here and there unfortunately.
I recently filmed my niece-in-law's wedding. I didn't have any fancy mic setups (can't afford it at this stage), and this wasn't any sort of 'professional' work, more of just something for the family (free), but the audio came out excellent. Yes, it caught ambient noise (obviously), but I don't hear any cutoffs or badly pitched noises, or anything. The loud music and people cheering on and such all came through very clearly. Sure, it's no 'professional' bitrate or anything, but at 192kbps, it did the job.
Anyways, that was off topic, but all I'm saying is, you can't expect much from a photo taking centred camera which has been slapped on with nice video capabilities unfortunately. Also, due to the a65's age, I don't think Sony's bringing out anymore updates. My advice is either get an a77ii for it's awesome AF, or if full frame is a desire, then the a99 or a mirrorless (up to you).The a99 has a controllable focus range which is something I like, that way, if you're using autofocus (yeah... what 'professional' videographer would use autofocus aye?), you won't lose focus on subjects if something goes in front/behind it.Also, the little wheel at the front really helps in allowing you to make adjustments without disrupting video or causing too much movement in the camera. Right now, I am planning on getting a RX10ii. Though I'd love to get something from the mirrorless range, it's just way out of my budget (even the RX10ii is, so there's a lot of saving to do right now also...). Anyways, good luck with your videos.

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).

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

Help obtaining physical model dim level column name please

I admit I haven't read all scripting posts (yet), nonetheless someone may be gracious enough to help me with understanding the object property structure involving physical model dimension level column names.
I imported the following from an 11g instance using a dictionary import (not a DDL file import) into a virgin 3.1.1 data modeler:
create table a_dim as select 1 key, 1 payload from dual;
create dimension a_dim
level level_1 is a_dim.key
The following Transformer Rhino Javascript succinctly exhibits my ignorance:
importPackage(Packages.javax.swing);
function test_get_dim_level_column_name(o)
JOptionPane.showMessageDialog(null, model.getDesign().getRelationalDesign().getSorageDesigns().toArray()[0].getDimensionSet().toArray()[0].getLevelSet()[0]);
JOptionPane.showMessageDialog(null, model.getDesign().getRelationalDesign().getSorageDesigns().toArray()[0].getDimensionSet().toArray()[0].getLevelSet()[0].getColumnSet());
JOptionPane.showMessageDialog(null, model.getDesign().getRelationalDesign().getSorageDesigns().toArray()[0].getDimensionSet().toArray()[0].getLevelSet()[0].getColumnSet().toArray()[0]);
The first result is LEVEL_1 as one would expect but the next two results are: B1ECDFB1-FE64-F728-8AB4-A5E7F098D02D rather than KEY.
I tried prosaic attacks such as getName() and I tried the abstruse things including determining that the class of this hex stringified result is: oracle.dbtools.crest.model.design.storage.oracle.LevelOracle$InlineList
My object inspection of this thingy left me clueless.

Re: “what are you trying to do?
- In the small: learn your object model and distill my ignorance into minimalist expositions
- In the large: The current reverse engineering from Oracle physical dimensional models to the MD model level has worked for me en masse but it seems to be unsuited for incremental development. Also subviews are not supported at the MD level. My goal is to create a transformer script to engineer selected Oracle physical model dimensions to multiple blank MD models and then manually add my subject area fact tables of interest. I expect to develop dozens, if not hundreds, of MD models.
Re: “Did you read README.rtf file in xmlmetadata\doc directory?
- No, I didn’t until this morning – it seems to be new with 3.1.1 since I don’t see it in the integrated SQL Developer Data Modeler 3.1.07 – thank you.
Re: “level.getColumns() - String is equal to level.getColumnset.toString() - it should return comma separated values (usually one) representing object ID
then when you get ID you can use model.getStorageDesign().getStorageObject( ID ) to get the object - the last is written in README.rtf file.
- Using your forum remarks and reading the README.rtf I was inspired to find my sought after “KEY” column name using:
var colid = model.getDesign().getRelationalDesign().getSorageDesigns().toArray()[0].getDimensionSet().toArray()[0].getLevelSet()[0].getColumnSet().toArray()[0];
var colname = model.getDesign().getRelationalDesign().getSorageDesigns().toArray()[0].getStorageObject(colid);
JOptionPane.showMessageDialog(null,colname);
- Thank you for helping with this indirection through the object IDs.
Some remarks en passant:
1)     Nit: getSorageDesigns should be getStorageDesigns as you likely have noted
2)     The developer workflow is clumsy – i.e. having to repeatedly open/close “Custom Libraries” slows down my iterative development. It be nice if I could leave it open
3)     In the integrated SQL Developer Data Modeler 3.1.07,: alt-T(ools) / alt-D(ata) Modeler does not allow progress into submenus
Thank you Philip.
- Kevin

GRC 10 -PC - Not showing Regulations for Control Design Assement in Planner

Hi Experts,
I need very urgent help from you guies,
Point 1. I am training to do the Survey for Control Desing Assesment .
     --Created Survey for Control Design
     --Created Questions for Control Design
Then i created planner
Planner under Assessment Planning in the Assessments work center
     created Planner
     Enter Planner Name : ABC
     Select Plan Activity :Perform Control Design Assessment from drop down list
     It display my Survey Templet name and selected the same as previously created one
and then specified Due Date xxxxx
then i click on Next button
Select Regulation screen is displaying ..
hear is the Issue
I am not able to find the Regulations in this screen..
But i checked in SPRO..all regulations are mapped to Perform Control Design Assessment
So what is the path forward for this..please help me.
thanks,
Suresh

Hi Karina,
Thanks for Response ..
Node "Relate Regulation to Plan Usage" in SPRO ?
In this Customizing activity, you assign specific plan usages to specific regulations
--->Already Assign specif plan to usages to specific regulations for Ref Please see the below info
PERF-CDASS--->SOX
PERF-CDASS --->ZINTERNAL_CONTROLS
PERF-CDASS-->ZSOD
As Naveen Discussed on above What Role should required to assign in Org level ,can you please specify the roles,So that i can recheck it.
please let me know for path forward.
thanks
Suresh

Adding Proportional control using NI LabView Control Design Toolkit

I was just wondering is it possible to add a proportional control to your program using the NI Control design toolkit? There is a PID control fuction available, but i just want the P
Thanks

LC87,
A proprotional controller is equivalent to a multiply, so you could just create a transfer function with Numerator=[Kp] and Denominator=[1]. You could also use the CD Create PID Model (Parallel) with zero wired to the Integral Gain (Ki) and Derivative Gain (Kd). If you are going to implement this in a Simulation Loop, then all you need to do is use a multiply primitive.
Chris M

How to improve the query performance in to report level and designer level

How to improve the query performance in to report level and designer level......?
Plz let me know the detail view......

first its all based on the design of the database, universe and the report.
at the universe Level, you have to check your Contexts very well to get the optimal performance of the universe and also your joins, keep your joins with key fields, will give you the best performance.
at the report level, try to make the reports dynamic as much as you can, (Parameters) and so on.
and when you create a paremeter try to get it match with the key fields in the database.
good luck
Amr

No zoom level controls on second monitor!

I use a second monitor to display a loupe view of the photo I have selected in the grid view, which is on the first monitor. I have always had the zoom-level controls (Fit, Fill, etc.) at the bottom of the loupe display on the second moitor, until I replaced my first monitor this week. Everything else is still the same, but I no longer have the zoom controls on the second monitor. This means that I cannot change the zoom levels that are availabel to me. I either have Fit or 100% zoom. Without the zoom controls on the second monitor I can't change the settings. Does anyone know how to get the zoom controls back (or why they might have disappeared)?
Thanks for any help.

Never mind. I found the problem (the second monitor was in full-screen mode). Nothing
to see here. Keep moving.

(Control Design & Simulation) State-Space block doesn't give output

I've tried and tried but can't get the State-Space block module to give me a graph / output.
I have no idea what the problem is and hope that somebody can help me. The numbers and calculations work in Matlab (Simulink) but i can't get it to simulate in labview.
Anybody got any ideas?
Solved!
Go to Solution.
Attachments:
Cavities.vi ‏30 KB
Matrixes.vi ‏27 KB

The problem is that you are assuming that LabVIEW executes left to right. Dataflow doesn't work this way. Your code as this:
does not tell LabVIEW that it has to execute everything from left to right. What is happening is that he is executing the 3 'island' of code in parallel and, in this case, it will have 'empty' values. You have to remove the local variables to make this work and dataflow paradigm will execute your code from left to right, as you want. here is the code:
Also, one more thing. Your input to the "CD Linear Simulation" is all zero. That means that you are trying to input zero input to a linear system, which will give you a zero output to the response. You probably do not want that since zero as input doesn't give you any more information. If you want to see how to system goes to zero after initial conditions, you should use "CD Initial Response". Or you should modify the input signal to the system. Please study this shipping example to understand how to use Linear Simulation and Initial Response:
C:\Program Files (x86)\National Instruments\LabVIEW 2012\examples\Control and Simulation\Control Design\Time Analysis\CDEx Time Domain Analysis.vi
Hope this helps...
Barp - Control and Simulation Group - LabVIEW R&D - National Instruments

Level Control with PID Control & Pulse-Width Modulation

Hi all,
I have attached my program which I'm having trouble wiring up in the block diagram.... I'm fairly new to labview, but basically I have a level control project with an analog input cistern arm turning a pot for my test tank (configured as DAQ assistant voltage analog i/p) and a pump working off a reservoir (configured as DAQ assistant voltage digital o/p). My electrical side of things is working correctly and I have tested both DAQ assistants I/O's successfully off a basic program, minus the PID & PWM... I found a simple PID control subvi which I think I have wired up correctly, apart from the output variable... I also found a bit of code for PWM using the square waveform vi (far right side of the program) which I have tried to include in the program, but I've been unsuccessful with that. The ideal operation i'm looking for with this project is to be able to enter different values for the setpoint, for the PID to kick in to find that setpoint each time using the PWM to drive the pump, which has a flow rate of 13L/min. I have a manual valve to release water from my test tank which I can set accordingly.
My questions are;
- How do I connect the 'output variable' of the PID subvi to my DAQ assistant digital output(both DAQ assistants are set at 1 sample on demand)?
I have a 'number to boolean array' function, but this gives an error saying that the number of tasks generated are not the same...
- How do I wire up the PWM bit of code? Do I need to include the 'error in & out' tabs?
-Am I on the right track with this program or am I way off the mark?!
Any feedback on this would be greatly appreciated. Thanks for your time,
Richie
Attachments:
PID-RichLevelControl.vi ‏91 KB

Rich-MechatronicsStudent wrote:My questions are;
- How do I connect the 'output variable' of the PID subvi to my DAQ assistant digital output(both DAQ assistants are set at 1 sample on demand)?
I have a 'number to boolean array' function, but this gives an error saying that the number of tasks generated are not the same...
- How do I wire up the PWM bit of code? Do I need to include the 'error in & out' tabs?
-Am I on the right track with this program or am I way off the mark?!
You're a bit off track. You need the output of the PID to go into the PWM generator, and the output of the PWM to be written to the digital output. Right now you have the output of the PID connected directly to the Digital Output in a way that won't work, and the PWM generator hanging off the side not really connected to anything. Also, the PWM generator isn't really going to work since you're generating it at the same frequency as your PID loop runs. Try a simpler algorithm such as on/off control first and see if that works for your system.

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 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 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

Model of level control design

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