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Limited Investigation of the Effects of Elevator Rate Limiting and Stick Dynamics on Longitudinal Pilot Induced Oscillations (HAVE GRIP).
Final rept. Jul-Oct 96,
AIR FORCE FLIGHT TEST CENTER EDWARDS AFB CA
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This report presents the results of the HAVE GRIP flight test program. This program performed a limited investigation of the effects of stick dynamics and elevator rate limiting on longitudinal pilot induced oscillations PIOs and was performed as a Test Management Project as part of the Test Pilot School curriculum. The theoretical research behind this flight test was performed as part of an Air Force Institute of Technology thesis under the sponsorship of Wright Laboratorys Flight Control Division. The research and flight testing was sponsored by the Flight Control Division of Wright Laboratory. The first phase of this program investigated how elevator rate limiting affected the susceptibility to PIOs during offset landing tasks. The second phase investigated how variations in stick spring constant and natural frequency affected the PIO susceptibility of the system at a given elevator rate limit. The third phase investigated the combined effects of changing elevator rate limits with variations in stick spring constant and natural frequency.
APPROVED FOR PUBLIC RELEASE