Accession Number : AD0777804

Title :   Hydrofluidic Yaw SAS Analysis Design and Development

Descriptive Note : Final rept. 1 Apr 1972-1 Oct 1973

Corporate Author : HONEYWELL INC MINNEAPOLIS MN GOVERNMENT AND AERONAUTICAL PRODUCTS DIV

Personal Author(s) : Ogren, Harvey D

PDF Url : AD0777804

Report Date : Mar 1974

Pagination or Media Count : 62

Abstract : The objective of this program was to design and develop the integrated sensor/controller/series servoactuator package of a hydrofluidic stability augmentation system which will be subsequently demonstrated during operational suitability tests. The sensor/controller was designed based on the performance of a breadboard model that was flight tested in the OH-58A helicopter. From the flight test program, the system gain was increased and a straight rate loop was added as a result of pilot requests. The final system gain was 0.023 inch of servoactuator per degree per second of rate input. The straight rate loop gain was set at 10% of the system gain. Temperature compensation was incorporated into the various circuits by adding negative feedback that contained a viscous resistor. This technique reduced the gain change versus temperature that was obtained in the past.

Descriptors :   *HELICOPTERS, *STABILIZATION SYSTEMS, ANALOG SIMULATION, FLIGHT TESTING, FLUIDICS, SERVOMECHANISMS, TRANSDUCERS, TRANSFER FUNCTIONS, YAW

Subject Categories : Helicopters
      Flight Control and Instrumentation

Distribution Statement : APPROVED FOR PUBLIC RELEASE