Accession Number:

ADA172455

Title:

Test Evaluation of a Reconfigurable Fault-Tolerant Fly-By-Wire Actuation System

Descriptive Note:

Interim rept. May-Oct 1983

Corporate Author:

DYNAMIC CONTROLS INC DAYTON OH

Personal Author(s):

• Talley, William G.
• Minch, Julianne
• Jenney, Gavin D.

Report Date:

1986-07-08

Pagination or Media Count:

198.0

Abstract:

The system was designed to be two-fail-operate for electromechanical failures and single-fail-operate for hydromechanical failures. The system used a single microprocessor to close the position control loop, monitor the operation of the actuator and reconfigure the system upon component failures of the actuator. The microprocessor was not designed to be failure tolerant. The testing conducted was a measurement of the input-to-output characteristics of the system. The system was unusual in the use of a microprocessor for failure detection and control and in that electro-hydraulic channels were operated together in a nominal force fight configuration. The test evaluation included operating the system in both loaded and unloaded configurations. The system operated successfully with inputoutput characteristics similar to other fly-by- wire systems. Areas where improvements or careful design should be implemented are presented in the report.

Descriptors:

• *FLIGHT CONTROL SYSTEMS
• *INPUT OUTPUT PROCESSING
• *ACTUATORS
• *FLY BY WIRE CONTROL
• TEST AND EVALUATION
• CONTROL
• DIGITAL SYSTEMS
• POSITION(LOCATION)
• DETECTION
• MICROPROCESSORS
• MONITORING
• FAILURE
• ELECTROMECHANICAL DEVICES
• CONFIGURATIONS
• TOLERANCE
• OPERATION
• FAILURE(MECHANICS)
• LOOPS
• CHANNELS
• SERVOMECHANISMS
• HYDRAULIC EQUIPMENT
• ELECTRICAL EQUIPMENT
• FAULTS
• UNLOADING
• REDUNDANT COMPONENTS

Subject Categories:

• Flight Control and Instrumentation
• Computer Hardware

Distribution Statement:

APPROVED FOR PUBLIC RELEASE