Accession Number : AD0777804

Title :   Hydrofluidic Yaw SAS Analysis Design and Development.

Descriptive Note : Final rept. 1 Apr 72-1 Oct 73,

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

Personal Author(s) : Ogren,Harvey D.

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 operatonal 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. (Modified author abstract)

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

Subject Categories : Helicopters
      Flight Control and Instrumentation

Distribution Statement : APPROVED FOR PUBLIC RELEASE