Thermal control of space vehicles Patent

Passive thermal control coating on aluminum foil laminate for inflatable spacecraft surface

Attitude sensor for space vehicles Patent

Attitude sensor with scanning mirrors for detecting orientation of space vehicle with respect to plane

Tank construction for space vehicles Patent

Liquid propellant tank design with semitoroidal bulkhea

A Monte Carlo photocurrent/photoemission computer program

A Monte Carlo computer program was developed for the computation of photocurrents and photoemission in gamma (X-ray)-irradiated materials. The program was used for computation of radiation-induced surface currents on space vehicles and the computation of radiation-induced space charge environments within space vehicles

Shielding of Space Vehicles by Magnetic Fields

Spacecraft shielding by magnetic field

Attitude orientation of spin-stabilized space vehicles Patent

Attitude orientation control of spin stabilized final stage space vehicles, using horizon scanner

Hydraulic support for dynamic testing Patent

Hydraulic support apparatus for dynamic testing of space vehicles under near-free flight condition

Minimum weight shield synthesis for space vehicles

Minimum weight proton shield synthesis for space vehicle

Robust control of flexible space vehicles with minimum structural excitation: On-off pulse control of flexible space vehicles

Both feedback and feedforward control approaches for uncertain dynamical systems (in particular, with uncertainty in structural mode frequency) are investigated. The control objective is to achieve a fast settling time (high performance) and robustness (insensitivity) to plant uncertainty. Preshaping of an ideal, time optimal control input using a tapped-delay filter is shown to provide a fast settling time with robust performance. A robust, non-minimum-phase feedback controller is synthesized with particular emphasis on its proper implementation for a non-zero set-point control problem. It is shown that a properly designed, feedback controller performs well, as compared with a time optimal open loop controller with special preshaping for performance robustness. Also included are two separate papers by the same authors on this subject

Optical tracking mount Patent

Tracking mount for laser telescope employed in tracking large rockets and space vehicles to give information regarding azimuth and elevatio