Crew Compartment Vibration Environment in The B-52 Aircraft during Low- Altitude, High-Speed Flight
Abstract
Measurements were made of the pilot station vibration environment experienced in the B-52 aircraft during low-altitude, high-speed flight. Data were obtained of the longitudinal, lateral and vertical linear accelerations and the roll axis angular velocities and accelerations. The terrain contour following flights at 500-900 feet above the flat to semi-mountainous regions of Louisiana and Arkansas were made at 350 knots true airspeed. Data analyses included probability density and distribution and the auto-power spectral density functions in addition to tests for stationarity, randomness and normality. The individual degree-of-freedom results are presented in graphical and tabular form and in general indicate that the pilot station vibration environment produced by the combination of gust response and maneuvering: (1) is stationary for up to 590 seconds; (2) is a random phenomena that does not satisfy the chi-square goodness-of-fit test for Gaussian distribution; (3) cannot be adequately simulated in the laboratory for human biomedical tolerance and/or psycho-physiological performance studies using only vertical axis motion; (4) is remarkably in agreement with those PSD's calculated for the lateral and vertical axes using an aircraft transfer function experimentally derived on another program and the Dryden gust input spectrum.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1971
- Accession Number
- AD0727023
Entities
People
- Jerry D. Speakman
- Justis F. Rose Jr.
Organizations
- Air Force Research Laboratory