Society of Robots - Robot Forum

Mechanics and Construction => Mechanics and Construction => Topic started by: thisisweak on January 05, 2009, 12:12:36 PM

Title: Two thruster underwater ROV propusion
Post by: thisisweak on January 05, 2009, 12:12:36 PM

Hi,

I am part of a team in college building a Rov for the MATE ROV competition.  My team is discussing using two thrusters (Brushed DC motors without feedback).  A thruster would be on each side.  To turn one would be off or reversed and the other would be forward.  We are talking about using dimmer switch control.  Here is my question

Are two brushed DC motors of the same make and model the same?  I am worried that without any type of feedback may not be possible to go in a straight line easily.

thanx,

Matt

Title: Re: Two thruster underwater ROV propusion
Post by: Admin on January 27, 2009, 12:14:39 AM

Quote

Are two brushed DC motors of the same make and model the same?

not quite sure what you are asking . . .

Quote

I am worried that without any type of feedback may not be possible to go in a straight line easily.

For an ROV you don't want feedback on the motors, you want feedback on the vehicle itself. For example gyros, accelerometer, etc.

Feedback on the motor would keep the motor spinning at a defined speed. Feedback on the vehicle would keep the vehicle going straight.

Title: Re: Two thruster underwater ROV propusion
Post by: cooldog on January 27, 2009, 04:35:46 PM

try moding bilge pumps

http://www.homebuiltrovs.com/