Adams View create own driving cycle

[deepimpact]

Hello everyone,

at first, im an absolute beginner in adams view. I need to work with adams for my bachelor thesis.
Now my question: i have an full vehicle model in adams and a table of many values(speed over time, yaw rate over time). How can the model follow this specify driving cycle? or how can i integrate the values in the model?
There maybe a tutorial or a literature?

thanks and best regards

 

[GregLocock]

I don't understand why you people build vehicle models in View rather than Car, which is designed for the job. However...

If you can reduce your yaw velocity table back to a steering input command, then you need a traction controller, to control the speed, which looks like this

               *******************************
               *                             *
               *     TRACTION CONTROLLER     *
               *                             *
               *******************************

               ARRAY/id
               NUMBERS = p, i, dfid

               where:
                    id   = traction controller gain ARRAY id
                           (must be equal to arytrg in ARRAY/93)
                    p    = proportional gain on error
                    i    = integral gain on error
                    dfid = traction DIF id


ARRAY/50,NUM=0.5,10,50


               ARRAY/id
               NUMBERS = tdel, ont, offt

               where:
                    id   = traction controller time ARRAY id
                           (must be equal to arytrt in ARRAY/93)
                    tdel = time required to turn off (sec)
                    ont  = time at which traction is turned on (sec)
                    offt = time at which traction is completely off (sec)

ARRAY/51,NUM=0.1,0,0.2


               DIF/id, IC=0.0,
               FUNC = USER ( 1102, spid, imot, bm, gm )

               where:
                    id   = traction controller DIF id
                    spid = traction time history SPLINE id
                    imot = type of error in traction SPLINE
                             1 = displacment error  (mm)
                             2 = velocity error     (mm/s)
                             3 = acceleration error (mm/s-s)
                             4 = force error        (N)
                    bm   = sprung mass traction marker
                    gm   = marker on ground


DIF/50, IC=0.0,
,   FUNC=USER(1102,50,2,5150,3)

! Speed Trace from C:/Legacy/Octave/Octave-4.2.1/wigglep5hz.asc
SPLINE/50,
,X=0.000000e+00,1.000000e-02,2.000000e-02,3.000000e-02,4.000000e-02,
,Y=-20833.33,-20833.33,-20833.33,-20833.33,-20833.33,

and a steering controller, which in this case rotates a steering wheel

MOTION/735,JOINT=10,ROT
,   FUNC=VARVAL(735)


MOTION/740,JOINT=740,ROT                                             MOTION FOR AUXILLARY JOINT
,    FUNC=0.0

VARIABLE/735
,   FUNC=DTOR*AKISPL(TIME, 0, 510)                                  ! USER DEFINED SPLINE



ARRAY/1530, SIZE = 1
, NUM = 0.0                                                          !STEERING WHEEL ANGLE FROM SSC CONSTANT RADIUS

! Steering Wheel Angle Trace from C:/Legacy/Octave/Octave-4.2.1/wigglep5hz.asc
SPLINE/510,
,X=0,0.01,0.02,0.03,0.04,
,Y=

I can't say whether this works as this is from an old version, but it looks OK to me. There may be a simpler way to do this directly in View, but you are just as good at reading Help documentation as I am.

Cheers

Greg Locock


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