IN THIS PROPOSAL, A GENERAL METHODOLOGY WILL BE DEVELOPED FOR THE ANALYSIS OF THE DYNAMICS AND STABILITY OF HYPERVELOCITY FLIGHT VEHICLES.

IN THIS PROPOSAL, A GENERAL METHODOLOGY WILL BE DEVELOPED FOR THE ANALYSIS OF THE DYNAMICS AND STABILITY OF HYPERVELOCITY FLIGHT VEHICLES. A SYSTEMATIC APPROACH TO THE ANALYSIS AND DESIGN OF CONTROL SYSTEMS FOR THESE VEHICLES WILL BE DEVELOPED. THE APPROACH TO BE USED IS THE GENERALIZED MULTIPLE SCALES (GMS) METHOD ESTABLISHED BY THE PRINCIPAL INVESTIGATOR WHICH IS PARTICULARLY APPLICABLE WHEN THE DYNAMIC PHENOMENON EXHIBIT RAPID AND SLOW VARIATIONS AS IN THE CASE OF A HYPERVELOCITY VEHICLE. THE GMS APPROACH IS ALSO APPLICABLE TO THE DESIGN OF THE CONTROL SYSTEM. THE PHASE I EFFORT WILL DEVELOP THE METHODOLOGY AND VALIDATE IT TO A FIRST LEVEL USING AVAILABLE SPACE SHUTTLE DATA. THE PHASE II TASK WILL EXTEND THE TECHNIQUE TO TREAT MORE COMPLEX CHARACTERIZATIONS OF THE VEHICLE AND INCLUDE EXTENSIVE VALIDATION SIMULATIONS.