- Fri Apr 07, 2006 1:22 pm
#12006
I was wondering if there is a gyro accelrometer combo board that would work on high G applications like in rocketry?
The MEMS sensors are rated to minimum 1500G's so they'll take the shock. Now, the right angle boards... there is a way, but you're not going to like it. Multi-planar boards can be hardened to high G and high frequency loads, but they require you to put the unit in a box and fill it with parafin (candlemaking) wax. Thermal flow may become an issue this way. This is a standard engineering practice for vibration isolation of prototypes, with pre-production and production usually going for an epoxy fill.
Now, given most HPR rockets top out at 20G's of acceleration, you could risk a launch with the standard design (soldered together for rigidity and support them well and they might survive), but you'd peak the accelerometers on the first go, so you'd have to attempt to reorient while airborne, possibly in freefall. You'll at least need a custom V1 board with ADXL 321's (18G) or ADXL 278's (35 or 50G). Unfortunately the V2 board just doesn't have anything pin-compatible that goes above 10G's.
Just noticed that the 6 DOF IMU V1 doesn't mention WHICH accelerometers they're using... so you can't tell if it's the 5G models or the 2G.