Analysis of an electrohydraulic aircraft control-surface servo and comparison with test results / by John W. Edwards.

Format:

Book

Government document

Author/Creator:

Edwards, John W., author.

Contributor:

United States. National Aeronautics and Space Administration, issuing body.

Flight Research Center (U.S.)

Series:

NASA technical note ; D-6928.

NASA/TN ; D-6928

Language:

English

Subjects (All):

Airplanes--Hydraulic equipment--Mathematical models.

Airplanes.

Airplanes--Control systems--Mathematical models.

Hydraulic servomechanisms--Mathematical models.

Hydraulic servomechanisms.

Physical Description:

1 online resource (72 pages) : illustrations.

Place of Publication:

Washington, D.C. : National Aeronautics and Space Administration, August 1972.

Summary:

An analysis of an electrohydraulic aircraft control-surface system is made in which the system is modeled as a lumped, two-mass, spring-coupled system controlled by a servo valve. Both linear and nonlinear models are developed, and the effects of hinge-moment loading are included. Transfer functions of the system and approximate literal factors of the transfer functions for several cases are presented. The damping action of dynamic pressure feedback is analyzed. Comparisons of the model responses with results from tests made on a highly resonant rudder control-surface servo indicate the adequacy of the model. The effects of variations in hinge-moment loading are illustrated.

Notes:

"August 1972."

Includes bibliographical references (page 40).

Description based on online resource, PDF version; title from title page (NASA, viewed on June 22, 2021).

OCLC:

22407223