Research of Person-Parachute System Motion in Free-Fall Phase
Firstly, the characteristics of person-parachute sys-tem (PPS) in free-fall phase are analyzed. Then, the particle motion equations of PPS are built up. The motion law of PPS in free-fall phase is found by computing. Fall synthesis velocity decreases firstly, then gradually increases, so there is a minimum value of synthesis velocity when is favorable parachute opening moment. Results and actual test show good agreement, which provides an evidence for determining parachute opening moment.
Y. X. Yu and Y. F. Wang, "Research of Person-Parachute System Motion in Free-Fall Phase", Advanced Materials Research, Vols. 383-390, pp. 916-919, 2012