Delivery Order NNL13AA08B-NNL15AA55T

"DOE-ENHANCED SPC FOR WIND TUNNEL APPLICATION" THE OBJECTIVES OF THIS TASK ARE TO 1) DEVELOP AND DEMONSTRATE METHODOLOGY TO COMBINE DESIGN OF EXPERIMENTS (DOE) METHODOLOGY AND STATISTICAL PROCESS CONTROL (SPC) METHODOLOGY FOR CHECK STANDARD WIND TUNNEL TESTS AT LARC, AND 2) TO EXPAND THE CLASSIC SPC METHODOLOGY BY EVALUATING REGRESSION MODELS FOR AERODYNAMIC CHARACTERIZATION. DOE METHODS PROVIDE A VEHICLE FOR PRODUCING EXPERIMENTAL DATA WITH KNOWN LEVELS OF ACCURACY. THE SOURCE OF VARIATION IN THE DATA CAN BE DETERMINED USING SPECIALIZED TECHNIQUES. BY COMBINING STATISTICAL PROCESS CONTROL (SPC) METHODOLOGY FOR CHECK STANDARD TESTS CURRENTLY USED IN LARC WIND TUNNELS WITH DOE METHODOLOGY, IT MAY BE POSSIBLE TO NOT ONLY MEASURE THE DATA REPEATABILITY WITH TIME (TO SHOW OUR PROCESSES ARE STABLE) BUT TO ALSO DETERMINE THE SOURCES OF VARIATION, THEREBY CREATING THE POSSIBILITY OF REDUCING OR ELIMINATING THEM. THIS WORK EFFORT IS A CONTINUATION OF TASK ORDER NNL14AA25T WHICH ALSO SUPPORTS A PH.D. DISSERTATION TOPIC. 3. DESCRIPTION OF THE WORK TO BE PERFORMED: 3.1 THE CONTRACTOR SHALL BE RESPONSIBLE FOR PROVIDING AN APPROPRIATE WIND TUNNEL, STANDARD AIRCRAFT MODEL, BALANCE, STING SUPPORT, MODEL POSITIONING SYSTEM, AND INSTRUMENTATION PACKAGE OF SUFFICIENT ACCURACY TO ASSESS METHODS FOR MONITORING WIND TUNNEL DATA QUALITY THROUGH USE OF BOTH ONE-FACTOR-AT-A-TIME (OFAT) AND DOE EXPERIMENTS. ALL COSTS ASSOCIATED WITH THE WIND TUNNEL TESTING INCLUDING, BUT NOT LIMITED TO, THE MODEL, INSTRUMENTATION, AND WIND TUNNEL OPERATIONS SHALL BE BORNE BY THE CONTRACTOR. 3.2 THE CONTRACTOR SHALL CONDUCT STANDARDIZED OFAT TESTING OVER MULTIPLE ENTRIES IN A LOW COST FACILITY TO SIMULATE SPC USE AT LARC GROUND TEST FACILITIES. THE TEST MATRIX SHALL BE REPEATED FOR THREE LEVELS OF VARIATION [I.E. BACK-TO-BACK (SHORT TERM) REPEATS, WITHIN-TEST (INTERMEDIATE TERM) REPEATS, AND TEST-TO-TEST REPEATS (LONG TERM)]. A MINIMUM OF 20 TESTS SHALL BE CONDUCTED TO PROVIDE SUFFICIENT DATA TO COMPUTE BASELINE STANDARD DEVIATIONS FOR AERODYNAMIC COEFFICIENT GROUP AVERAGES AND GROUP RANGES OF THE DATA. 3.3 THE CONTRACTOR SHALL THEN REPEAT TESTING USING A TEST MATRIX DEVELOPED USING DOE METHODOLOGY. SUFFICIENT TESTING SHALL BE DONE TO PROVIDE THE SAME THREE LEVELS OF VARIATION AND TO DEVELOP AND DEMONSTRATE THE METHODOLOGY FOR COMBINING THE TWO DATA SETS (OFAT AND DOE) TO MONITOR TUNNEL DATA QUALITY USING SPC CONTROL CHART METHODS CURRENTLY IN USE AT LARC. 3.4 THE CONTRACTOR SHALL DEVELOP ADVANCED DOE METHODOLOGY TO EXPAND DOE DATASETS BY EVALUATING REGRESSION MODELS FOR AERODYNAMIC CHARACTERIZATION. THE CONTRACTOR SHALL CONDUCT SUFFICIENT WIND TUNNEL TESTING TO VALIDATE THIS METHODOLOGY AND TO DEMONSTRATE THE CAPABILITY TO DETERMINE THE SOURCES OF VARIATION IN THE DATA.