The dynamics and control of the Space Station polar platformThe Space Station polar platform will carry a variety of earth observation instruments for NASA and the National Oceanic and Atmospheric Administration. In this paper, the asymmetrical platform is modeled as three connected rigid bodies. A generalized angular momentum equation is employed to derive the rotational equations of motion. These equations are linearized and used for preliminary sizing of control devices using a classical control approach. Two control systems are considered to stabilize the platform and satisfy the pointing requirements. The first system is composed of a single variable-speed, double-gimbaled momentum wheel and the second consists of three-reaction wheels. The performance of each system is assessed using a linear optimal control approach.
Document ID
19870063288
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Wahbah, M. M. (McDonnell Douglas Astronautics Co. Houston, TX, United States)
Andersen, G. C. (NASA Goddard Space Flight Center; Lockheed Missiles and Space Co., Inc. Greenbelt, MD, United States)