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14-Alexandrite
July 23, 2020
Solved

Wheel climbing a ramp

  • July 23, 2020
  • 1 reply
  • 9183 views

Hello to all Mathcad professionnals

I need your help again.

 

I need to calculate a drive torque for a wheel climbing a ramp.

i can calculate this,  but my worksheet is not elegant and is heavy 😥 (probably, i'a m using matchad programmation not correctly)

 

Annotation 2020-07-23 135517.jpg

 

Here is now i do

The ramp is cylindrical profil

in first time

Annotation 2020-07-23 114502.jpg

 

now, i dicotomize a ramp ( arc lenght)

Annotation 2020-07-23 114729.jpg

 

In second time. At this step, this is a mechanical problem

I assume the ramp angle is simply a/2 .

In fact, the ramp (red line, on the picture) is the tangent equation at the circle. the first point where we calculate a tangent is calculate with polar coordinates from dicotomized values.

 

Annotation 2020-07-23 115400.jpg

 

I think my result its Ok

but i want more 😁

 

I want calculate all Traction forces and all associated torques for all dicotomized value.

in one program ?

and i want to draw all result

at this moment i am lost, can you help me

thank

 

attacher P6 file

 

Best answer by Werner_E

The maximum is not exactly at 22.5°:

Werner_E_0-1595612802353.png

Good thing that we have functions 🙂

 

1 reply

XDN14-AlexandriteAuthor
14-Alexandrite
July 23, 2020

I wrote a nonsense😓

a/2 🤒  just a is ok

but how to do exit red value

Annotation 2020-07-23 135517.jpg

 

 

 

XDN14-AlexandriteAuthor
14-Alexandrite
July 23, 2020

sorry i make a lot of rookie mistakes

Annotation 2020-07-23 154207.jpg

 good

25-Diamond I
July 23, 2020

Why is your radius R unitless?

Werner_E_0-1595512774580.png