Accession Number : AD0622443


Title :   AN ANALYSIS OF THE INERTIAL PROPERTIES AND PERFORMANCE OF THE ASTRONAUT MANEUVERING SYSTEM.


Descriptive Note : Master's thesis,


Corporate Author : AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OHIO SCHOOL OF ENGINEERING


Personal Author(s) : Tieber,Julius Anthony ; Lindemuth,Robert Walter


Report Date : Aug 1965


Pagination or Media Count : 250


Abstract : To predict the system performance in space, the inertial properties of the Astronaut Maneuvering System (AMS) were determined. An existing mathematical model of the human body was revised and improved on the basis of improved regression equations and additional anthropometric dimensions. A mathematical model of a space suit was designed on the basis of measurements of suited subjects and suit weight regression equations. These models were combined into a model of a suited body. A computer program calculated the inertial properties of this model and compared them with experimental data. Results indicated the following: (1) Horizontal accelerations are more efficient than vertical accelerations; (2) The effects of inertial cross-coupling cause considerable loss of efficiency in roll and yaw maneuvers; (3) System performance is better with smaller astronauts, not just because of inherently higher accelerations, but also higher efficiency factors; (4) Variations in attitude deadband width have no significant effect on performance; (5) Inertial cross-coupling and center of gravity and line-of-thrust misalignment will make attitude control difficult while performing maneuvers in the manual control mode. (Author)


Descriptors :   *PROPULSION SYSTEMS , MANEUVERABILITY , ASTRONAUTS , ANTHROPOMETRY , BIOPHYSICS , PERFORMANCE(HUMAN) , POSTURE(PHYSIOLOGY) , LIFE SUPPORT SYSTEMS , THRUST , ATTITUDE CONTROL SYSTEMS , AUTOMATIC , TABLES(DATA)


Distribution Statement : APPROVED FOR PUBLIC RELEASE