The use of differential pressure feedback in an automatic flight control systemA feasibility study has been performed to evaluate the performance of a system whereby a control surface is positioned with differential pressure as the feedback variable. Analogous to a position command system, the control surface is commanded to move until a certain differential pressure is achieved at a given point on the surface. Frequency response tests and theoretical considerations indicate that the pressure feedback transfer function is first order, with a break frequency up to 50 rad/sec. There exist applications to the outer loops of flight control systems as well. Stability augmentation, gust alleviation, and stall prevention appear to be possible by feeding back differential pressure across lifting and control surfaces.
Document ID
19820055446
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Levy, D. W. (Kansas Univ. Center for Research, Inc. Lawrence, KS, United States)
Roskam, J. (Kansas Univ. Center for Research, Inc. Lawrence, KS, United States)
Finn, P. D. (Kansas University Center for Research, Inc., Flight Research Laboratory, Lawrence, KS, United States)