User's Guide to BIODYN-80; An Interactive Software Package for Modeling Biodynamic Feedthrough to a Pilot's Hands, Head, and Eyes

摘要

BIODYN-80 is an interactive computer program for solving the dynamic motion response of seated aircrew (pilots or equipment operators) working in a biodynamic environment (such as vibration or changing levels of acceleration in aircraft, surface vehicles, or motion simulators). The multi-degree-of-freedom, lumped-parameter model includes elements for: pelvis, torso, neck, head, eyes, upper and lower arms, hand-grip and control stick (center-stick with arm rest). An active 21-parameter neuromuscular system is operable with either the limb or head control. The eye's image motion dynamics include a 13-parameter model for the fixation and vestibuloocular reflexes. The nonlinear equations of motion of the body's main elements are linearized about a general set of body-limb-head postures, ranging from prone, to erect, to supine. Inputs are vertical or fore-aft accelerations of the seat, while a wide variety of outputs are available, including motions of the shoulder, head, eyes, arm, hand, or control stick. Typical parameter ranges and sources are given, along with two 'typical' sets: a seated-pilot with center-stick, and a seated crewman with hands in lap. The program can be run in a mode interactive with the user, or in a batch mode. The program helps the user load the necessary parameters, and offers a 'quick-look' printer plot of the resulting frequency responses, in standard Bode-plot forms. The program also can produce biomechanical transmissability files needed for use in the Air Force's PIVIB program for tracking performance estimation. Procedures and examples are given for both a Cyber 175 version and a PDP-10 version.