- #1

michael7777

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I wasnt sure where to post my question. Here goes:

I have a car with 4 wheels and one motor.

The motor drives an axle connected to the back wheels.

The total mass of the car is 1000kg

Each wheel weighs 20kg and is a solid cylinder

The effective frictional force is 0.2

The radius of the wheel is 0.5m

The radius of the axle is 0.05m

If I would like to accelerate at 12m/s from rest:

What is the required torque on each wheel?

What is the required motor torque?

Here is my lame solution which I think is pretty incorrect:

F = ma * m/g + um

Fwheel = (ma * m/g + um) / 4

Twheel =( (ma * m/g + um) / 4 ) * radius

Twheel = ( (1000*12 * 1000/9.8 + 0.2*1000) / 4 ) * 0.5

Twheel = 153086.2 Nm

Tmotor = 4*Twheel = 612344.9 Nm

I think maybe you need Io = (MR^2) / 2

But i don't know

I have a car with 4 wheels and one motor.

The motor drives an axle connected to the back wheels.

The total mass of the car is 1000kg

Each wheel weighs 20kg and is a solid cylinder

The effective frictional force is 0.2

The radius of the wheel is 0.5m

The radius of the axle is 0.05m

If I would like to accelerate at 12m/s from rest:

What is the required torque on each wheel?

What is the required motor torque?

Here is my lame solution which I think is pretty incorrect:

F = ma * m/g + um

Fwheel = (ma * m/g + um) / 4

Twheel =( (ma * m/g + um) / 4 ) * radius

Twheel = ( (1000*12 * 1000/9.8 + 0.2*1000) / 4 ) * 0.5

Twheel = 153086.2 Nm

Tmotor = 4*Twheel = 612344.9 Nm

I think maybe you need Io = (MR^2) / 2

But i don't know

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