Author Topic: Amazing fact to ask you when designing robot (pls ans)  (Read 671 times)

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Offline wise318Topic starter

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Amazing fact to ask you when designing robot (pls ans)
« on: November 15, 2011, 02:24:24 AM »
1.How does having different weight distribution affect driving torque ?

2. Though 4 wheel drive provide better acceleration than 2 wd , what are tg
The drawback ?

3. Will powerful motor always guarantee faster acceleration ?
« Last Edit: November 15, 2011, 02:25:46 AM by wise318 »

Offline newInRobotics

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Re: Amazing fact to ask you when designing robot (pls ans)
« Reply #1 on: November 15, 2011, 04:21:46 AM »
1.How does having different weight distribution affect driving torque ?
Torque is a measure of force coming from the motor, so it won't be affected, in other words, if stall torque of the motor is 3N.m, it will be the same no mater how disbalanced Your bot will be. However, it will have affect RPM of each motor, so if right side of the bot is heavier than left, right side motors will have to work harder and hence at lower RPM, that is, if there's no feedback system in place, Your bot will drift to the right. Other thing to consider is traction, heavier side will have more traction than the lighter one, again, that might cause drifting.

2. Though 4 wheel drive provide better acceleration than 2 wd , what are tg
The drawback ?
Higher power consumption, hence shorter battery life Price, as 4 motors and feedback circuits will cost twice as much as for 2 motors and their circuitry. Bot being heavier.

3. Will powerful motor always guarantee faster acceleration ?
[...] faster acceleration than what, less powerfull motors? If You have Corsa with 1.3 CDTI and other same size Corsa with 1.7 CDTI, which will have more torque and higher acceleration?   ;)

Note: I have 1.3 Corsa  ;D
« Last Edit: November 15, 2011, 03:05:22 PM by newInRobotics »
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Offline Soeren

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Re: Amazing fact to ask you when designing robot (pls ans)
« Reply #2 on: November 15, 2011, 02:40:01 PM »
Hi,

1.How does having different weight distribution affect driving torque ?
Well, less weight on the driving wheels may mean a loss of traction, hence less torque is transferred to the ground.
This sounds a bit like school work, so do some Googling!


2. Though 4 wheel drive provide better acceleration than 2 wd , what are tg
The drawback ?
More Googling!


3. Will powerful motor always guarantee faster acceleration ?
No, the motor is only part of the equation.
Yet another Google opportunity.
Regards,
Søren

A rather fast and fairly heavy robot with quite large wheels needs what? A lot of power?
Please remember...
Engineering is based on numbers - not adjectives

 


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