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Optimal control algorithms for four-dimensional guidance of a transport aircraft were investigated for feasibility. Cost function constraints on the optimal reference path generator appeared impossible to achieve and the optimal guidance algorithms do not achieve significant performance improvement without excessive increases in sophistication and cost of the onboard avionics computer. A modularized existing Mission Management system allows a three-phase flight test plan to demonstrate the operational capability of the existing classical integrated flight trajectory control algorithms. (Author).
Proliferation of advanced weapon systems and increasingly complex aircraft, coupled with multiple control of aircraft in a tactical environment, has placed a demanding workload on the aircrew. This report summarizes the studies and analyses to more efficiently accomplish man-machine interaction with the flight control system, the weapon systems, and the navigation system. A detailed trade-off study was performed to determine the accuracies of navigation systems that would be required to meet performance goals with both precision inertial reference units and strapdown inertial units. Operation, with messages incoming to the cockpit via data link, was evaluated and a pilot-in-the-loop simulation was accomplished to determine an acceptable method to keep the pilot informed of command and control directives. Methods for entering this data into the guidance and control system were also analyzed. In the approach used, the cockpit consisted of CRT displays and a real-time trajectory generation routine. The data-linked information was entered directly into the central processor and acted upon by the trajectory generation. This information was then displayed to the pilot for approval/disapproval prior to being incorporated into the active flight plan. A brief discussion of follow-on recommendations is also presented. (Author).
This report presents an analysis of the overall control-display task for complex trajectory flight using MLS equipment. It explores the interrelationships of complex trajectory definition an geometry, approach plate design data entry, monitoring, displays, and controls. It recommends several electro-mechanical and electronic control-display configurations. It also recommends four candidate MLS equipment configurations with various levels of capability which are applicable to the USAF inventory. MLS integration studies are presented for the C-130A/D, F-111A/E, A-7D, F-15A, and KC-10A.
Optimal Trajectories in Atmospheric Flight deals with the optimization of trajectories in atmospheric flight. The book begins with a simple treatment of functional optimization followed by a discussion of switching theory. It then presents the derivation of the general equations of motion along with the basic knowledge in aerodynamics and propulsion necessary for the analysis of atmospheric flight trajectories. It goes on to the study of optimal trajectories by providing the general properties of the optimal aerodynamic controls and the integrals of motion. This is followed by discussions of high subsonic and supersonic flight, and approximation techniques to reduce the order of the problem for a fast computation of the optimal trajectory. The final chapters present analyses of optimal reentry trajectories and orbital maneuvers. This book is intended as a reference text for scientists and engineers wanting to get into the subject of optimal trajectories in atmospheric flight. If used for teaching purposes, the book is written in a self-contained way so that a selective use of the material is at the discretion of the lecturer. The first 11 chapters are sufficient for a one-semester course with emphasis on optimal maneuvers of high performance aircraft.