USA flag logo/image

An Official Website of the United States Government

Optimal Rendezvous and Docking Simulator for Elliptical Orbits

Award Information

National Aeronautics and Space Administration
Award ID:
Program Year/Program:
2006 / SBIR
Agency Tracking Number:
Solicitation Year:
Solicitation Topic Code:
Solicitation Number:
Small Business Information
Woman-Owned: Yes
Minority-Owned: No
HUBZone-Owned: No
Phase 1
Fiscal Year: 2006
Title: Optimal Rendezvous and Docking Simulator for Elliptical Orbits
Agency: NASA
Contract: NNL06AA56P
Award Amount: $69,280.00


It is proposed to develop and implement a simulation of spacecraft rendezvous and docking guidance, navigation, and control in elliptical orbit. The foundation of the simulation will be an extension of an existing tool for optimal rendezvous and docking simulations for spacecraft in circular orbit. The existing tool architecture functions in two phases. In the first phase, optimal trajectories are obtained for the point mass model of the docking vehicle subject to path constraints, with the assumption that the target vehicle is in a known, circular orbit. In the second phase of the simulation, the vehicle is considered as a rigid body whose attitude and trajectory is controlled such that the docking port is aligned with the target vehicle at the time of docking, and the flight path follows the optimal trajectory. It is proposed to extend the first phase trajectory optimization capability of this tool to the case when the target vehicle is in an elliptical orbit, and to also add the capability to model rendezvous navigation sensors in order to make use of estimated state feedback rather than true state feedback during the second phase of the simulation.

Principal Investigator:

Haijun Shen
Principal Investigator

Business Contact:

Dennis C. Bulgatz
Business Official
Small Business Information at Submission:

Analytical Mechanics Assoc Inc
303 Butler Farm Road, Suite 104A Hampton, VA 23666

EIN/Tax ID: 111999848
Number of Employees:
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No