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Unread 03-03-2012, 01:16
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Matt Krass Matt Krass is offline
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FRC #0263 (Sachem Aftershock)
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Re: Control System Design Contest Proposal

Quote:
Originally Posted by techhelpbb View Post
I'm suggesting this system wide basically. So that everything with control logic (including the Jaguars and Victors) can have that logic powered up from a separate source from the one that powers the motors.
Aha, I see, it makes sense, but I'm not sure it is really weight feasible to add a secondary power source like that, and I'm not sure what advantage it would really get you?

Quote:
Originally Posted by techhelpbb View Post
Actually I'd just like packet statistics for the control system. Especially if there's a laptop on the robot it's quite doable. You don't need to go quite to the point of a whole WireShark packet sniffer, but you could at least tag the types and quantities of packets sent and received that would be a great help.

Speaking of which I'd like a real time clock in the control system please, regardless of the presence of the laptop (epoch time is fine and it doesn't need to be from 1970 like in Unix).
I think the current FMS software tracks that data, you might be able to get your hands on it if you ask the right person, perhaps Mark McLeod? He seems to have a lot of background info on what's going on there. An RTC is a nice feature, but for the 3 minute bursts of activity is it really necessary?

Quote:
Originally Posted by techhelpbb View Post
Really would like to have confirmation of the magnitude of the current that did the tripping. I realize this adds weight, so as I originally planned and did these could be modular. I think they are most important on drive systems and other places where occasional overloads might happen and get misdiagnosed.

In point of fact someone will point out that a DMM can do this (but slower) or an oscilloscope with a current probe can do this, faster but much heavier. I'm looking for the compromise. Something light enough for competition, approved for competition, but removable for those that don't want it. Like the suggestion I gave for reverse voltage protection on the Jaguars.
Since the over-current protection in Jaguars is software based, it would easy enough to save the value when the shutdown activates. For the breakers, it would have to be another solution obviously.

Matt
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Matt Krass
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I'm a FIRST relic of sorts, I remember when we used PBASIC and we got CH Flightsticks in the KoP. In my day we didn't have motorized carts, we pushed our robots uphill, both ways! (Houston 2003!)
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