Limited variance control in statistical low thrust guidance analysis

Details Limited variance control in statistical low thrust guidance analysis Limited variance control in statistical low thrust guidance analysis

Jul 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975aiaa.confu....j&link_type=abstract

American Astronautical Society and American Institute of Aeronautics and Astronautics, Astrodynamics Specialist Conference, Nass

Statistics

Flyby Missions, Low Thrust Propulsion, Solar Electric Propulsion, Spacecraft Guidance, Thrust Programming, Trajectory Optimization, Comets, Stochastic Processes, Terminal Guidance, Thrust Vector Control, Variance (Statistics)

Scientific paper

Difficulties arise in guiding a solar electric propulsion spacecraft due to nongravitational accelerations caused by random fluctuations in the magnitude and direction of the thrust vector. These difficulties may be handled by using a low thrust guidance law based on the linear-quadratic-Gaussian problem of stochastic control theory with a minimum terminal miss performance criterion. Explicit constraints are imposed on the variances of the control parameters, and an algorithm based on the Hilbert space extension of a parameter optimization method is presented for calculation of gains in the guidance law. The terminal navigation of a 1980 flyby mission to the comet Encke is used as an example.

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