Open Access. Powered by Scholars. Published by Universities.®
- Keyword
- Publication
- Publication Type
Articles 1 - 3 of 3
Full-Text Articles in Aerospace Engineering
Controlling The Primary Mirror In A Space-Based Telescope Utilizing An Eigenstructure Assignment Technique, Kim Kyongsoo
Controlling The Primary Mirror In A Space-Based Telescope Utilizing An Eigenstructure Assignment Technique, Kim Kyongsoo
Theses and Dissertations
The feasibility of using a sparse array of mirrors in a satellite system is being evaluated. This study focused on the control laws necessary for achieving the minimization of the effect of vibration which happens at the primary mirror of the satellite, by using the eigenstructure assignment technique. White Gaussian noise was assumed as the external input. AFRL has developed a 79 state model with 9 control inputs and 9 outputs, 3 sparse array mirrors, and a base. To extend the theory, a simplified model with 2 mirrors and a base which has 12 states, 4 control inputs and 8 …
Outside Loop Control In Asymmetrical Trimmed Flight Conditions, Gary D. Miller
Outside Loop Control In Asymmetrical Trimmed Flight Conditions, Gary D. Miller
Theses and Dissertations
Traditionally flight control systems have used linearized equations of motion solved around a single trim point. This thesis proposes a nested-loop controller directly solved from the equations of motion. The control equations were developed as a solution to asymmetrically trimmed flight conditions. A two-loop design was proposed for the controller. The outer loop modeled the aircraft as a point mass and all forces were balanced to find the aircraft states. The equations input the control variables and output the aircraft states. The inner-loop utilizes the six-degree of freedom model of the aircraft to solve the moment equations. With the input …
A Superior Tool For Airline Operations, Michael C. Dorneich, Stephen D. Whitlow, Christopher A. Miller, John A. Allen
A Superior Tool For Airline Operations, Michael C. Dorneich, Stephen D. Whitlow, Christopher A. Miller, John A. Allen
Michael C. Dorneich
The Diversion Off-Gate Management Assistant (DOGMA) is a decision support tool that mitigates problems in making diversion decisions in the airline industry. DOGMA helps inexperienced dispatchers to provide superior and consistent diversion decisions that translate into minimizing the impact of time-critical diversion decisions and increasing the airline's ability to recover from severe schedule disruptions. The tool integrates multiple information sources to improve dispatchers' situation awareness of the current state of flight, aircraft, maintenance, crew, and passenger schedules.