Several years of cooperative research conducted under the U.S./German Memorandum of Understanding (MOU) in helicopter aeromechanics have recently resulted in a successful handling qualities study. The focus of this cooperative research has been the effect of time delays in a high bandwidth vehicle on handling qualities. The jointly performed study included the use of U.S. ground-based simulation and German in-flight simulation facilities. The NASA-Ames Vertical Motion Simulator (VMS) was used to develop a high bandwidth slalom tracking task which took into consideration the constraints of the facilities. The VMS was also used to define a range of the test parameters and to perform initial handling qualities evaluations. The flight tests were conducted using DLR's variable-stability BO 105 S3 Advanced Technology Testing Helicoper System (ATTHeS). Configurations included a rate command and an attitude command response system with added time delays of up to 160 milliseconds over the baseline and band width values between 1.5 and 4.5 rad/sec. Sixty-six evaluations were performed in about 25 hours of flight time during ten days of testing. The results indicate a need to more tightly constrain the allowable roll axis phase delay for the Level 1 and Level 2 requirements in the U.S. Army's specification for helicopter handling qualities, ADS-33C.
Investigation of the effects of bandwidth and time delay on helicopter roll-axis handling qualities
Untersuchung der Einflüsse von Bandbreite und Zeitverzögerung auf die Helikopter-Rollachsen-Handhabungsqualitäten
Journal of the American Helicopter Society ; 39 , 3 ; 24-33
1994
10 Seiten, 13 Bilder, 23 Quellen
Aufsatz (Zeitschrift)
Englisch
Investigation of the Effects of Bandwidth and Time Delay on Helicopter Roll-Axis Handling Qualities
Online Contents | 1994
|