filter fir Bandstop

Similar Questions

• PtbyPt filter FIR in the Loop Simulation

  Hello

  Currently, I am trying to simulate the power in my engine when I apply a voltage step for 20 MS for that I intend to use a FIR filter in the control and simulation module that simulates the other parts of the engine.

  However, I have found that the FIR filter seems to be strange behavior. When I change the order of Runge-Kutta 1 simulation to 2 of Runge-Kutta it effects the output of the filter FIR PtbyPt VI. The two attached images show how the results of the convolution of the IR and the tension, the FIR outside the simulation loop filter and FIR filter in a loop using Runge-Kutta 1 are the same. However, the second image shows that the FIR filter in the loop simulation Runge-Kutta 2, has a different answer.

  Why does this happen? As I understand it, the type of simulation should have little effect on the application of a FIR filter based on pt by pt. I have not changed the timestep or other parts of the simulation. I want to use a simulation of order higher than for other parts of Runge-Kutta 1 would be insufficient for the simulation.

  I'm using LabVIEW 2011 SP1.

  Thank you

  Rhys

  When you try to use RK-2 or higher order, the screw that dumped you inside the control and the Simulation loop, by default, they will all run in the "minor" time steps too. In your case, 'two times' which means the VI will be executed each time step.

  To properly configure these screws, you must "right click" on the VI and select "Installation of the Sub - VI node. This will bring to a Setup page that the second half you will choose in 'Type of Simulation Subvi execution' to 'remove' the "Include minor steps" box and press OK. When you do this, the Sub - VI will be annotated on the upper right with blue 'C' and when you run, it should provide a similar result as RK-1.

  Note that in this dialog box, you can also select discreet, which, in many cases, it is the right selection for 'discrete' systems

  I hope this helps...

• Savitzky-Golay smoothing filter FIR

  Which version has the FIR Savitzky-Golay smoothing filter?

  Professional or business?

  Mario

  Hi Mario,.

  The FIR Savitzky-Golay smoothing filter is in the Professional and Enterprise.

  Information on what is and is not included is located on the link below:

  http://www.NI.com/analysis/cwtools_analysis.htm

  I also checked using Professional editions and Enterprise functions exist in two versions of assemblies Analysis.

• Low pass FIR Filter on FPGA

  Hey guys,.

  I the DFD Toolbox and already built a few low pass FIR filter. I have a sampling rate of 50 kHz and I decimate it with a CIC filter with rate variable decimation. After the CIC filter, I need a high-grab for the low-pass filter FIR because I do want my DC signal. As I can change my rate of decimation, my FIR filter sampling rate changes also.

  The problem is that the coefficients of the filter cannot be changed during execution as the Butterworth IIR-filter function, including labview has implemented in the mathematics of the fpga function palette section.

  Are there examples how to build FIR filters where I can change the coefficients on the run?

  Think you can build a low pass FIR with the DFD toolkit and simply change the table with the coef. for a control? I could change them on the track...

  Greetz

  Slev1n

  Hi Slev1n,

  just found it in the community, maybe this might help you already:

  Polyphase Interpolation FIR Filter on FPGA with Diabaté and Coregen

  https://decibel.NI.com/content/docs/doc-16650

  Greetings

  Michael

• Filtration of single-point data

  Hello, I'm trying to filter the data of voltage point unique task, but there is an error of frequency... I have set at 120 Hz sampling frequency and I want bandpass filter for example of 30 to 40 Hz...

  

  So, where is problem? I tried to use a timed loop or "align and re - sample" sampling frequency, but this filter still does not work...

  

  You know, how to use this filter with single point task? When I do my own filter FIR with the same settings, the results are not same, this is the reason why I want to use this filter.

  If I use DAQ Assistant, there is no errors, but I can't use for other reasons (1) I can't use single point and all daq assistant, daq assistant 2) can't do pressure)

  

  These images add nothing to the discussion. If you buy a single point at a time, you have NO frequency and cannot use the normal filter function. Do what I said or use multi-sample reading or single reading point and build the table before making a filter. Best is to use the acquisition of data with several samples.

• Bandstop filter

  Is there a way to implement a bandstop filter in the NIVS framework?

  I have a return path to PID loop with oscillations in a very specific frequency range. I want to address in this range of just. The low-pass filter in the calculated channels feature will not help me.

  Thank you

  PatM

  I changed the location of the bandstop filter in my PID loop and that resolved the problem of lag. Everything seems to work fine now.

  Thanks for your help,

  PatM

• Help with bandstop filter

  I built a simple test VI to play with point-by-point bandstop filters.  I use a simple filter point by point the sinusoid to generate the entry.  I can't get any bandstop filter action.

  Can anyone help?

  

  I don't understand why you're not increment time linearly.  You just 0.001 * iteration.  You add the opposite of stage time to your time.

  In addition, use ms to wait rather than wait until the next multiple for your time of loop.

  

• In Matlab FIR filter for bandpass sampling and 250 to 700kHz frequency 250MSPS

  Hi all
  I want to design filter implemented on FPGA with a settings mentioned in the question but when I start to design it on matlab fdatool, it gives very high order filter result, when I decrease or set myself up to 10 order its impulse response is not good, as I hear it.

  I use high-speed ADC with the 250MSPS.
  Any idea will be very appreciable.
  Kind regards
  Umair

  Umair salvation,

  You can theoretically designated any filter you want in an FPGA. If you can implement the filter on a FPGA target is another story.

  There is usually some limitations on an FPGA, that one must take into account:

  -Number of flip flops, READ...

  -Maximum fare of lines

  -Number of available multipliers

  It is almost impossible to tell you, if you can implement your filter on a given target FPGA. The only way to get the right answer is to try it. A filter with the command = 50 could be really large and maybee does not fit on the FPGA or does not respect the loop rate you need.

  I do not use the FDATOOL, if I can't give you an answer to your second question.

  Stephan

• Why? I can't use the fire Filter (render)?

  Why can't I use light Filter (render)?

  I always get this msgs, when I use FILTERS = RENDER = > FLAMES

  THE SAME WITH the OTHER MAKE the FILTERS (TREES & FRAME)

  "CANNOT OPEN THE MODEL SCRIPTED DIALOG BOX. DEFAULT VALUES WILL BE USED"

  

  I'm looking at this topic,

  It seems that this has to do with EDITING > complete

  BUT when I click on fill I don't see script models

  the picture below comes from youtube (Photoshop CC: models scripted and fillings - YouTube)

  

  This is what mine looks like...

  

  Help, please...

  How can I fix?

  Your graphics driver seems obsolete. We will be updating that.

  Download, install and run their drivers update utility and drivers no matter what they you there are updates for say, to update all the.

  For the Intel® driver update utility

• CAN´t set up a low-pass filter properly

  Hello everyone,

  First of all, sorry for my bad English!

  Before asking this question, I ve tried to seek answers in the forum and couldn t find a useful for my case.

  I m new to LabView and I m test for the analysis of the signals.  I m using an Agilent signal generator and a NI USB 4431 to acquire the signal.

  OK, here´s my problem. I can´t use of a Butterworth or a Chebyshev filter (or any type) to create a low-pass filter filter. I Don t know if I didn t understand it s parameters correctly or if I m set something wrong. When I use the ExpressVI filter, I get the result I want to, but when I use the function of Butterworth, it doesn´t work.

  Can someone help me please?

  I m sending the project I ve designed, so that you guys can see what I ve done.

  Here some explanations: the "puro" labeled graph is the pure I m signal generation.

  The labeled graph "Spec. PURO"is the power spectrum of the signal current

  The graph "filtrado" is the signal after going through a low pass filter in the express VI (which works fine) and the graphic "filtrado Spec" is the power of it s spectrum.

  In the upper part of the loop is the function of Butterworth filter. I ve wired the pure data to its input signal and expect one out everything as the express VI creates, but he's not even conspire anything in the chart.

  

  The windowed FIR filter VI generates the error-20023, which constitutes a violation of Nyquist. Because this VI returns only an error code and not the cluster of standard error, you must connect explicitly an indicator or manipulation to the error output.

  The cause is that you have the frequency to zero.  OR use a somewhat confusing nomenclature for the inputs of the filter frequency screw these detailed help says:

  high cut-off frequency: fh is the high frequency in Hz. The default value is 0.45 Hz. The VI ignores this parameter when the type of filter (low pass) 0 or 1 (high-pass). When the filter type is 2 (bandpass) or 3 (Bandstop), high cut-off frequency: fh must be superior to low cut-off frequency: fl and respect theNyquist criterion.

  Thus, for the high pass filters and both low-pass cut-off frequency is the value wired to low cut-off frequency: fl. I regularly get this error. When I get strange results, I read the help and fix it. As soon as I wired 5000 to fl, the output looks like this:

  

  The differences in amplitude and transitory initial are likely due to different specifications of filter.

  The way I start it is to convert the flag to a Pure control, do default to the current value, and then put all the DAQmx screws in schema structures disable. I have disable placing the pure control (or a copy of it) in a case to permit the schema structure which has the DAQmx Read. Since you have only one data channel I added the Index table to get a unique waveform of the table. Then all the code signal analysis works.

  

  Lynn

• How can I activate the Tablet mode for kindle fire

  I loaded Firefox on my Kindle fire from an FTP site and seems to work.
  Firefox site indicates that the Kindle fire uses the default mobile mode and to have a Tablet mode by default see below but nothing is there.

  You can type about: config in the address bar and use the filter to find browser.ui.layout.tablet. Select it and use the arrow buttons to change the value to 1.

  This is an unsupported configuration and may cause an unusable interface.

• I upgraded fire fox several times and it says the my version is out of date and always tells me to upgrade.

  I log on fire fox and it says I need high grade. I update and it still says it it must be upgraded. I update, and he always says that I have to upgrade. I update, and it still says that I have to upgrade...

  Your string UserAgent in Firefox is marred by the addon that you have installed.
  http://en.Wikipedia.org/wiki/USER_AGENT

  Enter about: config in the URL bar and press ENTER.
  If you see the warning, you can confirm that you want to access this page.
  Filter = general.useragent.
  The preferences that are bold, one line at a time, right-click and select Reset.
  Then restart Firefox

• Camileo H10 - jerky video / flash still fires twice / blurry photos

  Hi please can someone help or advise. I recently bought a Toshiba Camileo H10 digital camcorder and have had some problems with it, I hope someone can help me solve them. First of all, let me start by saying I already updated to the latest firmware from a link someone posted on this firmware, it makes no difference to my questions.

  1. the video is very choppy (stuttery?) and it is most obvious when panoramic autour or zoom in and out. It's worse when you run at higher resolution (HD) and even worse when I turn on the image stabilizer. DV to my laptop from my 10 year Sony digital-8 camcorder video that I captured via a cable are much smoother than the video files I get card memory of the Camileo, with not a lot of difference in the quality. I can do to make it smoother?

  2. when I take a picture in normal flash mode (NO red flash mode) the flash fires twice, and he takes the photo on the 2nd flash... as if it was always flash red-eye mode. There is a delay of about 2 seconds between the flashes, i.e. at the point where the 2nd flash occurs, the subject has already taken the photo was taken and leaves. It seems that he is stuck in mode double-flash red-eye. Yes I certainly change it to red-eye flash in "normal" mode. It does automatic flash mode too. How can I make the camera only trigger the flash once, normal flash mode?

  3. I find it almost impossible to take a photo that does not suffer from blur, regardless of the lighting conditions. Trying to get a clear picture inside (flash enabled or disabled) is almost impossible, and most images outdoors in broad daylight are too blurry. It is impossible to try to get a picture of someone ' one/something thing that moves. It is obviously something to do with the length of exposure, I fixed it to automatic and have tried to change, does not have much difference (and I do not accept the duty to play with the settings, whenever I wanted to take a picture anyway...) It should handle and automatically adjust properly). Anyone know how I can get sharp pictures?

  Thank you very much

  Milo

  Hi guys

  I found this thread on Camileo H10 and the new firmware update:
  http://forums.computers.Toshiba-Europe.com/forums/thread.jspa?threadID=40630&TSTART=0

  Please check because the new firmware update brings new features and improve the quality of the picture, too.

  These are improvements that are provided with the new firmware update:

  1 give input MIC (improve the volume of MIC)
  2. set the focus window (improve the AF)
  3 tune AE to avoid exposure
  4 tune matrix color and saturation (performance of color)
  5. set the noise filter (improve the noise level)
  6. grant WB (improve the AWB)
  7 change the string from the user interface in CZ

  Good bye

• LabView parks-McClellan FIR differentiator

  I am trying to create a parks-McClellan differentiating factor in LabView.

  I use the example of Math/optimization/FIR Optimization.vi as starting point.

  However, change the type of filter to differentiation of multiband to differentiator factor gives an error. The Hilbert type also gives an error.

  Any ideas/tips on how to correctly use the factor of differentiation of the parks-McClellan FIR block option?

  As you can see on the screenshot, in LV 2014, the last two parameters you've tried don't give error. Here, I used #taps = 40, but 10 also works.

  

• SMU-5451. digital filter Interpolation

  Hello

  I use the SMU-5451 with FPGA SMU-7966R signal generator. They are related to peer-to-peer technology.

  I want to use the digital filter of Interoplation, but there is a place to errors in the property node. Here is a screen of this error.

  What should I do to fix this?

  Looks like the 5451 doesn't have a digital interpolation filter.  There is only a FIR filter on the device.  You can check that this is the case and that the problem is not the use P2P when trying to run a script example that does not use P2P and setting this property.  You should get the same error.