Peak principal strain in the corpus callosum, a 6DOF FE criteria, was the strongest predictor, followed by two criteria that included rotation measurements, peak rotational acceleration magnitude and Head Impact Power (HIP).
In order to avoid artifacts, the rotational velocity, the sample's distance to the center of rotation, and the rotational acceleration (during velocity transitions) have to be chosen appropriately.
He says "SpinLaunch employs a rotational acceleration method, harnessing angular momentum to gradually accelerate the vehicle to hypersonic speeds.
"The data does support the rotational acceleration hypothesis, but not overwhelmingly.
Primary rotational acceleration frequencies were much larger in drop tests (~100Hz) than field impacts (~10Hz).
Hergenrother, C. W. et al. Operational environment and rotational acceleration of asteroid (101955) Bennu from OSIRIS-REx observations.
For a given translational acceleration level, drop testing underestimated field rotational acceleration by 46% and rotational velocity by 72%.
This is a case for separate examination, by further dissection, of the forces needed to cause rotational acceleration.
"And lo and behold, we found that the hook delivered more than twice the rotational acceleration than anything else.
What's more, when the model replicated a woodpecker's natural alignment, it resulted in very low rotational acceleration.
