Loading...
Please wait, while we are loading the content...
Similar Documents
Analytical investigation of the dynamics of tethered constellations in earth orbit, phase 2 (Document No: 19870002382)
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Grossi, M. D. Lorenzini, E. C. Arnold, D. A. Cosmo, M. |
| Copyright Year | 1986 |
| Description | The following topics related to the dynamics of the 4-mass tethered system are addressed: (1) the development of damping algorithms for damping the out-of-plane libration of the system and the interaction of the out-of-plane control with the other degrees of freedom; and (2) the development of environmental models to be added to the dynamics simulation computer code. The environmental models are specifically a new drag routine based on the Jacchia's 1977 model, a J(2) model and an accurate thermal model of the wire. Regarding topic (1) a survey of various out-of-plane libration control laws was carried out. Consequently a yo-yo control law with amplitude of the tether length variation proportional to the amplitude of the out-of-game libration has been selected. This control law provides good damping when applied to a (theoretical) two-dimensional system. In the actual 3-dimensional 4-mass tethered system, however, energy is transferred to the least damped degrees of freedom (the out-of-plane lateral deflections are still undamped in the present simulations) in such a way as to decrease the effectiveness of the algorithm for out-of-plane libration control. The addition of damping algorithms for the out-of-plane lateral deflections is therefore necessary. |
| File Size | 1666499 |
| Page Count | 58 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19870002382 |
| Archival Resource Key | ark:/13960/t9867d77z |
| Language | English |
| Publisher Date | 1986-10-01 |
| Access Restriction | Open |
| Subject Keyword | Astrodynamics Dynamic Response Damping Earth Orbital Environments Satellite Drag Librational Motion Tetherlines Tethered Satellites Motion Stability Dynamic Control Gravitational Effects Temperature Effects Space Commercialization Control Theory Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
