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  • Users: T_M_S
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  1. T_M_S

    Force Moment Method within Full-Vehicle Analysis/Static and Quasi-Static Maneuvers

    Thank you. I will look into exploring those rabbitholes.
  2. T_M_S

    Force Moment Method within Full-Vehicle Analysis/Static and Quasi-Static Maneuvers

    Many thanks Greg. May I ask if there's more efficient way to export a/car results to Matlab other than spreadsheet and manually picking results data? Also - is there a way to find the script (and testrig) used in a/car to execute this simulation? Scrolling through a/car folder didn't help...
  3. T_M_S

    Performing quasi-static simulations. (Simscape/multibody)

    Good day everyone. I would like to model "quasi-static" simulations in Simscape/multibody. I created a vehicle model. Works perfectly well in shaker rig type simulations but I would also like to apply lateral/longitudinal accelerations (using variable gravity/time varying option within...
  4. T_M_S

    Force Moment Method within Full-Vehicle Analysis/Static and Quasi-Static Maneuvers

    Good day everyone, In A/Car there's an option to to do famous (due to Milliken's book) force moment method analysis. While it seem to work as expected, I can't figure out how to get that yaw moment diagram (yaw moment on y-axis and lateral acc on x-axis). Does anyone know how to do it? Also...
  5. T_M_S

    Problem exporting flat pattern (Composites Design) in DXF format.

    Hi All, I'm having a problem with exporting flat pattern (Composites Design) in DXF format. Thing is that everything worked fine but from some point it started exporting "empty" DXF file with no contour (annotations are still there). When I tried checking older parts/files where export was...
  6. T_M_S

    Frequency response in MatLab question

    ...0.23 ] for n=1: 5 [FM,error] = lsqcurvefit('splane2_fit',FM0 ,freq ,heave_gain,[],[],options); heavesys =tf([FM(1:2 )],[FM(3:4) 1 ]) FM0=FM+ .001*rand(1); end I added above code to this live script: [h_az_tf,n]=tfestimate(act_az,heave_az,winsize,overlap,nfft,Fs)...
  7. T_M_S

    Frequency response in MatLab question

    Thanks Cibachrome, Thing is that requests in A/Car are predefined and it is a bit too complicated to redefine them atm. So I set the units/scaling manually as can be seen in DataImport.mlx that I uploaded. Thank you, Ted
  8. T_M_S

    Frequency response in MatLab question

    Here's processing live script. There are also similar live scripts for Pitch, CPLV and tire deflection. Thank you, Tedhttps://files.engineering.com/getfile.aspx?folder=89060b77-7edd-4c02-a54d-d9872c6e00fd&file=Heave_AccCompare.mlx
  9. T_M_S

    Frequency response in MatLab question

    And here's live script files.https://files.engineering.com/getfile.aspx?folder=2a66db9e-54b7-4e22-9d45-95f26902237c&file=DataImport.mlx
  10. T_M_S

    Frequency response in MatLab question

    ...FRF Ratio") xlabel('Frequency (Hz)') ylabel('Magnitude') legend('d1',"d2") Heave_ Chassis Acceleration Response Phase plot(n,angle(h_az_tf)*57.3,'r') xlim(l) ylim([-200 200]) hold on plot(n,angle(h_az_tf2)*57.3,'b') hold off title("Heave Chassis Displacement FRF PHASE") xlabel('Frequency...
  11. T_M_S

    Frequency response in MatLab question

    Thanks for great post Cibachrome, I’m traveling right now but will reply as soon as I’m back home. Thank you, Ted
  12. T_M_S

    Frequency response in MatLab question

    In fact I was doing it differently: tfout=tfestimate(usual stiff in here) tfMag=abs(tfout) tfPhase=angle(tfout)*57.3 to approximate phase in deg. Then plot the above as two separate plots. After rescaling Adams signals this gives me reasonable results with heave. Doing it the way you...
  13. T_M_S

    Frequency response in MatLab question

    Thank you Greg, That's what I'm doing now and with some fiddling with signal(exported from Adams) scaling things are starting to make sense. Thank you, Ted
  14. T_M_S

    Frequency response in MatLab question

    Thank you Greg, There's definately a scaling mess which I have to fix first. Regarding your 2nd reply - do you mean plotting abs of tfestimate? I didn't find any other way. May be it's my English playing tricks with me but I couldn't find any other way of plotting other than Db on y axis...
  15. T_M_S

    Frequency response in MatLab question

    Thank you, IRstuff, Problem is that this is my 7th day with MatLab and I know very little at this point. It seems to me that conversion to Db is sort of imbedded in tfestimate MatLab function and I can't figure out how to undo the logarithm in the result plot of this function. When I write the...
  16. T_M_S

    Frequency response in MatLab question

    ...didn't allow me to express my question properly. As far as I understand (please correct me if I'm wrong). Db is a ratio of magnitude of two signals expressed as 20*Log(A2/A1). Is there a way that I can get the results of tfestimate function to be expressed on linear scale? Thank you, Ted
  17. T_M_S

    Frequency response in MatLab question

    Thank you, IRstuff. Would you mind if I ask you to provide a little more detail regarding finding reference level? Thank you, Ted
  18. T_M_S

    Frequency response in MatLab question

    Here's live script file Thank you, Tedhttps://files.engineering.com/getfile.aspx?folder=0c1e6bde-f717-44ca-ae20-337d537dfc6c&file=Question.mlx
  19. T_M_S

    Frequency response in MatLab question

    Here's .mat file illustrating above question. Thank you, Tedhttps://files.engineering.com/getfile.aspx?folder=6f250554-8b7d-48fa-8723-7ab0a7a3af77&file=Question.mat
  20. T_M_S

    Frequency response in MatLab question

    I’m doing my very first steps in MatLab (5 days since I had a first look at it). I’d like to ask for a bit of help: A bit of pretext: I’m trying to learn about vehicle ride dynamics using Adams car/ride 4 post shaker rig. I created a model representing amg gt4 car and excite the car with chirp...

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