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Efficient optimization of low-thrust spacecraft trajectories
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Terrile, Richard Fink, Wolfgang vonAllmen, Paul Lee, Seungwon Russell, Ryan Petropoulos Sr., Anastassios |
| Copyright Year | 2007 |
| Description | A paper describes a computationally efficient method of optimizing trajectories of spacecraft driven by propulsion systems that generate low thrusts and, hence, must be operated for long times. A common goal in trajectory-optimization problems is to find minimum-time, minimum-fuel, or Pareto-optimal trajectories (here, Pareto-optimality signifies that no other solutions are superior with respect to both flight time and fuel consumption). The present method utilizes genetic and simulated-annealing algorithms to search for globally Pareto-optimal solutions. These algorithms are implemented in parallel form to reduce computation time. These algorithms are coupled with either of two traditional trajectory- design approaches called "direct" and "indirect." In the direct approach, thrust control is discretized in either arc time or arc length, and the resulting discrete thrust vectors are optimized. The indirect approach involves the primer-vector theory (introduced in 1963), in which the thrust control problem is transformed into a co-state control problem and the initial values of the co-state vector are optimized. In application to two example orbit-transfer problems, this method was found to generate solutions comparable to those of other state-of-the-art trajectory-optimization methods while requiring much less computation time. |
| File Size | 194833 |
| Page Count | 1 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20100002843 |
| Archival Resource Key | ark:/13960/t28965q6k |
| Language | English |
| Publisher Date | 2007-07-01 |
| Access Restriction | Open |
| Subject Keyword | Man/system Technology And Life Support Propulsion System Performance Spacecraft Trajectories Fuel Consumption Thrust Control Trajectories Approach Control Propulsion System Configurations Trajectory Optimization Optimization Flight Time Spacecraft Propulsion 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 |
