I am wondering , why sensors have a difficulty to measure linear velocity online?
traction force is the result of motor torque.
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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...
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,
does " mass moment of inertia" of flexible body such as tire change during the motion?
Assuming the tire runs on soft ground without any deformation then goes on hard surface which cause deformation.
Can we use the maximum normal stress (at maximum wheel sinkage) which applies to a wheel surface (contact area between soil and wheel) as a cone index (CI)?
I need an amount of slip which is function of tractive force.
tractive force is a force that the terrain can support before slip happens.
Slip equals to s= 1-(actual speed of tire/theorical speed of tire). i have got the theorical speed but is very difficult to calculate the actual speed...
a vehicle moving on a sandy slope.
Is there any method to calculate the amount of soil slip on a slope?
I knew, we can find 100% slip (when vehicle sliding down) by friction force. But I want to know the amount of slip during vehicle movement.
many thanks,
I found that,,,,CNCHECK ....is initial information in contact tool?
if it is:
rough wheel-ground... contact side>>>>" contact" and status>>>closed
rough wheel-ground.....contact side "target" and status>>>Inactive.
I have done simulations for "frictional" as well.
with the same initial...
I am working on workbench ,,,where can I find CNCHECK and RID?
should I use "Rough connection" for initial contact as well?
or must be another connection option?
Thanks alot Drej for your very helpful advice.
It worked for rigid wheel at the hard ground perfectly.
but for flexible wheel (which has deformation) gave me this error massage"The solver engine was unable to converge on a solution for the nonlinear problem as constrained. Please see the...
there is a ground which wheel can moving on it. the connection between wheel and ground is "Rough".
In flexible dynamic set up, there are standard earth gravity, rotational velocity and fixed support( for the bottom face of ground).
in solution, i want to find out what is the reaction force...
I am simulating a wheel in workbench in flexible dynamic analysis, I applyed a rotational velocity to the wheel axis, But the wheel is not moving forward!!!
Is there other set up I must do to make the wheel going forward?
Thanks
I got the same problem and changed workspace and database size memory as much as I could in every method describe above, but still got error.
finally I changed the mesh size and problem solved!!!