×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

wheel velocity

wheel velocity

wheel velocity

(OP)
Assume a vehicle with four independently driven in-wheel motors on slope.


How can I calculate each wheel velocity? By knowing, the vehicle velocity, slope angle and each wheel torque.

thanks,

RE: wheel velocity

Since you have give slope angle and torque as a condition, is there any slippage?

rmw

RE: wheel velocity

(OP)
I have the vehicle and wheels dimensions and I calculated the normal force acting on each wheel.
 There is a slippage for each wheel on the slope.


(Wheel Traction force – wheel resistance force – wheel mass * g* sine (slope angle))/ Wheel mass= wheel acceleration

So I can find wheel velocity by integration of acceleration.

Is there more to consider?
 

RE: wheel velocity

(OP)


I am wondering , why sensors have a difficulty to measure linear velocity online?

 traction force is the result of motor torque.

if you think the question is too easy and don't want to answer it, plz dont write spam.

 

RE: wheel velocity

"There is a slippage for each wheel on the slope.


(Wheel Traction force – wheel resistance force – wheel mass * g* sine (slope angle))/ Wheel mass= wheel acceleration

So I can find wheel velocity by integration of acceleration."

Really?

I get infinity for the speed of the slippig wheels and you can't get vehicle speed from slipping wheel speed.

This sounds like a ridiculous homework problem. Ask your professor what he thinks the answer should be.

 

RE: wheel velocity

(OP)
I want to measure the wheel slippage on the soil.and I knew the vehicle velocity!, I need the each wheel linear velocity.

RE: wheel velocity

(OP)
I have tried that, haven't got right number! looks very easy but I am struggling with this.

RE: wheel velocity

(OP)
it is not match with tractive force V.s slip ratio for this particular soil type.

RE: wheel velocity

Quote:

I have tried that, haven't got right number! looks very easy but I am struggling with this.

How do you know you don't have the right number? What have you tried?  What resources have you used to arrive at your answer?

When I check calculations, I frequently ask for the source of any equations used -- so that I can verify that they're being used correctly.  I'd have a hard time with "someone on this free internet site told me that this was the way to calculate wheel velocity." (I'd also question anyone using wikipedia as their source, even if it was correct ...)

Patricia Lougheed

******

Please see FAQ731-376: Eng-Tips.com Forum Policies: Eng-Tips.com Forum Policies for tips on how to make the best use of the Eng-Tips Forums.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources