idevices Posted October 11, 2006 Report Share Posted October 11, 2006 I am currently working on a project to autonomously navigate a manned submarine through a course in a test tank 50' wide x 1/2 mi. long x 22' deep. For the most part, the sub has neutral buoyancy and just needs to navigate a straight line, however, we would still like to monitor the 3rd axis. The problem is that the speed is about 7-8kn. Our calculations are showing that there may be a situation where there can be a sideways drift undetectable by the accelerometers if we do not have a Gyro in the system. If this is the case, at that speed a crash is surly eminent and could be disastrous. Does anyone have any experience that may guide us in this situation? We are also looking at sonar, but we believe the tank may be too small, causing too much noise to be able to adjust for sufficient accurate sensitivity. Our budget for this control is going to be approximately $4000. Thanks in advance... Quote Link to comment Share on other sites More sharing options...
ZomBiE Posted October 12, 2006 Report Share Posted October 12, 2006 We tested similar assembly in our school, and we came into conclusion that gyroscopes are the best solution for this application. Try to study a bit of inertia navigation and you understand why. Quote Link to comment Share on other sites More sharing options...
idevices Posted October 12, 2006 Author Report Share Posted October 12, 2006 I do understand that, however I can't help but think that this can be overcome in programming. Did you get into the programming end to try to correct for this issue and did your accelerometers have enough resolution to detect the drift? I believe that if you can detect it then it can be corrected... Quote Link to comment Share on other sites More sharing options...
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