how to make a car move on a swept surface

Here is another question of mine, please go to the websites and have a look at the models, I can make a car move on a flat surface, but if it is a curved surface, then my simulation fails.


http://cid-9c8e01c1b0a827b5.spaces.live.com/photos/cns!9C8E0 1C1B0A827B5!110/


For a car on a flat surface, I've used the mates below:


*tangent mates between wheel's cylinderal surfaces and the road surface;


*parallel mate between the bottom surface of the body and the road surface;


BUT if the surface is a curved surface, then no mate is applicable between the body surface and the road surface, and also it seems impossible to give the proper x-axis direction for the translation of the body.


How to solve this problem? please give me a hint. Many many thanks!!

Evidently the link is bad. There's nothing there. Try again.

Joe L

I think that the mate PARALLEL is not necesary. For the swept surface, try to mate cyrcleS TANGENT to surface. The wheel's cylinderal surface has two cyrcles. Or... You can define a sketch CYRCLE in the middle of the wheel's cylinderal surfaces . Hope you understand my idea because my english is... Good luck !

the parallel mate is necessary to keep the body in balance, without it the car still moves but the body swings.


Sorry for the link, I've changed the permission of the space ,so try it again.


http://cid-9c8e01c1b0a827b5.spaces.live.com/default.aspx


Cheers

sorry, the parallel is definitely not necessary is I add two wheels to the vehicle since balance is no longer a problem. A four-wheeled car can move on a flat surface with two tangent mates ( each on one wheel on one side), but it CAN'T on a curved surface. Could anyone show me how to define the constraints on the curved surface?


Many thanks

I have a car !!!!


Wen you say A CAR, I understand 4 wheeles, not 2.


I think that your problem is not the car and is not the mates. Your problem is the road. In your pictures the road is not a SINGLE surface. I use the SPLINE to define the surface of the road, I mate my car as you say and I simulate gravitation in the movement direction. My car work fine in this conditions but I can not solve enother problem: the wheeles NOT rotate when the car move. If you contact me at [email protected] I send you my car (There are only 860 Kb). Good luck !

now it works, cheers you all



Edited by: swstudy