Abstract
The complete excitation between the boot and ski was measured during snow skiing. Data from two six degree-of-freedom dynamometers mounted inside the ski were pulse-coded and FM transmitted to a remote receiving station. Data from both cruising skiing maneuvers (snowplow, stem christiana, and parallel christiana) and authentic falls were recorded. These data were subsequently analyzed both in real time and by digital computer. In the computer analyses, attention was focused on the resultant boot loads. This paper discusses two aspects of the data reduction by digital computer, computation of power spectral density estimates and normalized covariance matrices. Both of these analysis techniques not only characterize the excitation environment but also lead to important conclusions regarding safety release binding design.
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