how to define a request for specifying the wheel angle in MSC Adams/car?

[Fariborz90808888]

hi

i intend to find out the wheel angle of the vehicle model in Adams/Car while steering in a subsystem assembly and a full vehilcle assembly, by defining a request...

how can i do that ? what parameters do i need for defining that request? what is the best way to do that?

appreciate your help.

 

[GregLocock]

Any particular wheel angle? If you mean steer angle or toe then there are already requests for that.

Cheers

Greg Locock


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[Fariborz90808888]

hi Greg Locock

thanks for replying

No particular wheel angles needed... i just need front wheel angles ... i could not find it in all the result sets, requests and objects...

the tuv_front/tuv_rear request gives the toe angle but it shows peculiar results in some tests and i can't consider it as the wheel angle... i don't know if i have chosen the right toe angle request that signifies for the wheel angle...

for instance the tuv_front gives the following result in a step steer test:

that's why i'm trying to define a request that gives the wheel front angle with respect to the chassis longitudinal axis...(usual wheel angle)

appreciate your help as always

 

[GregLocock]

Let me guess that is at roughly 30 m/s?

Cheers

Greg Locock


New here? Try reading these, they might help FAQ731-376

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[Fariborz90808888]

do you mean the vehicle longitudinal velocity?

nearly correct ... that is actually 22.22 m/s...

 

[GregLocock]

I think you are just measuring wheel rotation as it rolls down the road. Look in the adm for the request, find what marker it is using. animate that.



Cheers

Greg Locock


New here? Try reading these, they might help FAQ731-376

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[Fariborz90808888]

thanks a lot Greg Locock

but would you please elaborate on that... how can i do that? how can i find that marker? do you mean i should modify the request tuv_front/rear?

 

[GregLocock]

Look in the adm file. text search for the request

You'll find this

REQUEST/3032
, TITLE = tuv_front
, COMMENT = front suspension TUV toe and camber
, CUNITS = "no_units", "no_units", "no_units", "no_units", "no_units"
, "no_units", "no_units", "no_units"
, CNAMES = "", "Average_Camber", "Left_Camber", "Right_Camber", ""
, "Average_Toe", "Left_Toe", "Right_Toe"
, RESULTS_NAME = tuv_front
, FUNCTION = USER(1122, 979, 998, 616, 0)

so markers of interest are bolded . Those are the inputs to resqub 1122. animate those markers, read the help on the reqsub, see if you can figure out what is wrong.

Cheers

Greg Locock


New here? Try reading these, they might help FAQ731-376

http://eng-tips.com/market.cfm?

 

[Fariborz90808888]

thanks a lot Greg Locock

sure i will do that...thnak you for elaborating... i will keep you apprised...

 

[GregLocock]

The short answer is that MA/979 should steer with the wheel, but not rotate around the obvious axis.

Cheers

Greg Locock


New here? Try reading these, they might help FAQ731-376

http://eng-tips.com/market.cfm?