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Hover Test Follow-Up

A project log for GimbalBot

Gimbaled thrusters, aerospace-grade adhesives, carbon-fiber-reinforced polymers, and inertial measurement units. This is a space project!

zakqwyzakqwy 02/25/2015 at 23:320 Comments

Okay, I was pretty excited when I posted the last video. First tethered hover test! Yay!

Lots of stuff to figure out prior to the next hover test(s):

  1. Power: Enough with the damn LiPo setup and the 4-minute test limitation. I need shore power that will let me do sustained tests.
  2. Control: The USB mouse setup was hilarious but less than ideal. It may be time to bite the bullet and buy the RC gear (transmitter and receiver). Or spend another ten frustrating hours trying to get a damn Xbox360 dongle to talk to my Due.
  3. Safety: Thicker tethers that can't break, and (most importantly) a bit more distance between me and GimbalBot. I wasn't concerned with the previous test; while I did snap one cable, I still had the other, and the camera angle made it seem closer than it was. Even so--GimbalBot is scary and needs to be treated with respect.
  4. Data: Time to start gathering massive amounts of it. At the very least, I want throttle position, X/Y gimbal position, and IMU data at a fairly high rate. That means, most likely, serial datalogging via USB. My desktop PC isn't terribly mobile so I'll need to come up with another setup--maybe an old laptop, of which I have several.

Thus far, I've made significant progress towards solving (1) by purchasing this today:

Yup, it was time to step up my power supply game: 0-20 VDC, 0-50 A. I'll be able to comfortably emulate the 4S LiPo (16ish VDC) and provide plenty of current for both motors. I've been needing an excuse to install a 220 VAC drop in my basement, so... this will do. Shipping was more expensive than the actual power supply; either way, it should be here next week.

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