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Re: slingwing1 post# 5235

Monday, 02/18/2013 2:17:37 PM

Monday, February 18, 2013 2:17:37 PM

Post# of 26276
Hiya feller Hillbilly!

Well robotics and electronics are close but not the same. HALB’s airframes have existing flight controls that are electronically controlled. In this case you only need the sensors and some electronics to manipulate the flight controls. There would be no need for massive amounts of weight with robotics when you have existing components that can be manipulated with small electronics.

Rolla taught me otherwise-

The optical sensor systems are big, ugly, heavy and slow things down. Typically WCET (worst case execution time) is 100-120ms or more for calculations only, no sensor abstraction at all. A skilled, trained, experienced ridge runnin' slingwing jet fighter pilot takes 100-120ms from spotting something that needs to be avoided to the time they move the joy stick. Most of the world uses lots of heavy, power hungry, high clock CPU to get that kind of WCET. GOSY, for example, gets WCET of 15-20ms on low clock, low power, light weight solutions due to their proprietary algorithms. But CPU hardware weight is not the biggest problem. It is FOV for the optical systems, and THEIR update rate- Now it really gets messy in small UAV's since essentially no pay load capability for such.

We all all know what happens when you "over drive" your headlights! You hit the deer in the fence row driving from a Neil Diamond in KC while driving through the Ozarks near Warsaw to Springfield, as an example of ignoring WCET.

So now, given the physics taught at Rolla, Columbia, St. Louis, KC, and in virtually all engineering schools one may have some understanding as to my "smoke 'n' mirrors" position regarding HALB's characterizing their "obstacle avoidance" (aks "sense and avoid") as a "done deal."

Nope, not at all. Is very, very difficult!

Just my Branson/Hollister, Lake of the Ozarks, Rolla, West Plains, Birch Tree, Eminence, Houston, Ft. Wood, Waynesville, Current River, Popular Bluff, Ozark hillbilly opinion....

Mech