SHED: A program for three-dimensional, rigid body, shroud ejection dynamics
Abstract
The computer program SHED (for SHroud Ejection Dynamics) which calculates the exoatmospheric trajectory of a missile shroud is described. This rigid body dynamics program follows the motion of the shroud as its motors accelerate it ahead and away form the missile. Of particular interest is the ability of SHED to accommodate the forces produced by the motors which are fixed to the body in the sense that they both translate and rotate along with the body. The resulting program can accommodate an arbitrary number of motors, arranged in an arbitrary manner on the shroud, and each imposing an arbitrary schedule of thrust. The shroud may have any arbitrary shape. Guides can be accommodated which protect the payload by preventing shroud rotation or lateral motion until the shroud has passed over the guide. Limitations are that all bodies are assumed to be rigid and aerodynamic loads are not included. SHED has proven itself sufficiently robust and versatile to permit a critical comparison of a large range of shroud separation strategies in selecting a separation strategy for the Strategic TARgeting System (STARS) funded by the Army SDI Office.
- Publication:
-
NASA STI/Recon Technical Report N
- Pub Date:
- March 1988
- Bibcode:
- 1988STIN...8910927S
- Keywords:
-
- Dynamic Characteristics;
- Launching;
- Rocket Engines;
- Cartesian Coordinates;
- Equations Of Motion;
- Nose Cones;
- Launch Vehicles and Space Vehicles