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.

Report Date:

1974-03-01

Pagination or Media Count:

62.0

Abstract:

The objective of this program was to design and develop the integrated sensorcontrollerseries servoactuator package of a hydrofluidic stability augmentation system which will be subsequently demonstrated during operational suitability tests. The sensorcontroller 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