Task Manual Crew Override of Vehicle Landings following G-transitions - ISS (Wood)
Last Published:  07/29/22 01:33:24 PM (Central)
Short Title: Manual Crew Override
Responsible HRP Element: Human Health Countermeasures
Collaborating Org(s):
Funding Status: Active - Currently funded and in progress
Procurement Mechanism(s):
Our first specific aim is to examine adaptive changes in manual landing performance following g-transitions during a lunar landing simulation. This assessment will be based on changes between pre-flight to post-flight performance during manual crew override tasks. Participants will be recruited from both short duration (< 30-day, private astronaut missions) and long duration (~6-month) missions to the ISS. We will examine two types of piloting tasks that will enable postflight measures as early as possible. The first task involves a flight performed at the rally airport within hours of landing. Pre- and post-flight comparisons will be made in the participant’s ability to takeover controls following a mild perturbation to re-establish straight and level flight and initiate a landing approach through altitude “minimums” short of touchdown. The second task involves a simulated lunar landing on a 6DOF motion base in which participants manually takeover attitude and rate-of-descent to the nominal or re-designated landing aimpoints during the approach phase. Since the lunar landing task will be more novel, we will include ground control cohorts using the same test schedule to characterize learning and recency effects independent of spaceflight.

Our second specific aim will be to examine how spaceflight adaptive changes in vestibular, fine motor and cognitive function relate to changes in manual control performance. The test battery will include measures of motion sickness and sensitivity, vestibular thresholds, dual tasking and eye-hand coordination. In addition to helping characterize how changes in sensorimotor impairment contributes to manual control performance, we anticipate this task will contribute toward the development of sensorimotor standards that relate to landing performance.

Our third specific aim is to compare performance during “just-in-time” training on the aircraft and lunar landing tasks conducted late in-flight with post-flight crew performance. We hypothesize that proficiency on the “just-in-time” laptop trainer late in mission will be positively correlated with early postflight proficiency on the same task. This hypothesis will be tested by comparing the percent time maintaining actual vehicle states within recommended guidance during the landing approach between the JIT training and actual post-flight measures. The Modified Bedford Pilot Workload Scale measurement technique will also be used by participants to subjectively rate their workload for both  piloting tasks.