Trajectory reconstruction during thrusting phase of rockets using differential corrections
Abstract
It is proposed that differential correction techniques be used to reconstruct the trajectory of a sounding rocket or a launch vehicle during the powered phase of the flight, estimating the unmodeled acceleration along with the trajectory. The estimation technique is validated using simulated radar data; rapid convergence is obtained in each cycle with an error tolerance of 0.01 units. Furthermore, the results of applying the technique to sounding rockets data with a 1-Hz sampling rate and to satellite launch vehicle data with a 10-Hz sampling rate from 15 to 290 s indicate that the approach is useful in obtaining reasonable estimates of trajectory characteristics in near-real time with less effort.
- Publication:
-
Journal of Guidance Control Dynamics
- Pub Date:
- June 1985
- DOI:
- 10.2514/3.19996
- Bibcode:
- 1985JGCD....8..406M
- Keywords:
-
- Postflight Analysis;
- Sounding Rockets;
- Thrust Control;
- Trajectory Analysis;
- Acceleration;
- Equations Of Motion;
- Launch Vehicles;
- Taylor Series;
- Astrodynamics