IN SUPPORT OF THE ARES I, STATIC TESTING, REQUIREMENTS ARE VERIFIED AND THE MOTOR S PERFORMANCE IS THEN CHA…

Public award description

IN SUPPORT OF THE ARES I, STATIC TESTING, REQUIREMENTS ARE VERIFIED AND THE MOTOR S PERFORMANCE IS THEN CHARACTERIZED FOR GUIDANCE, NAVIGATION, AND CONTROL SIMULATION. ONE OF THE PARAMETERS OF INTEREST IS DYNAMIC THRUST VECTOR MISALIGNMENT (DTVM), WHICH IS THE DIFFERENCE, BETWEEN THE NOZZLE VECTOR ANGLE ESTIMATED FROM THE FORCE MEASUREMENT SYSTEM (VECTOR RESOLUTION) AND THE NOZZLE VECTOR ANGLE ESTIMATED FROM A POSITION-SENSING SYSTEM (MEASURED LOCATION). FROM THE STATIC FIRING, THERE IS A NEED TO VERIFY THAT A STATED PERCENTAGE OF ALL MOTORS HAVE A DTVM LESS THAN AN EXPERIMENTALLY ESTIMATED VALUE WITH A SPECIFIED LEVEL OF CONFIDENCE. THE REQUIREMENT APPLIES TO THE FAMILY (POPULATION) OF MOTORS, NOT A SINGLE MOTOR. IN ADDITION, DTVM IS A FUNCTION OF OTHER FACTORS DURING THE FIRING. THEREFORE, DTVM IS NOT A SINGLE NUMBER; RATHER IT IS EXPRESSED AS A MATHEMATICAL RESPONSE SURFACE MODEL.