Design Considerations for Hydraulically Powered Fly-By-Wire Flight Control Actuation Systems
I.D. # C1132 Duration .5 Day

This four-hour short course will present an overview of hydraulically powered flight control actuation systems used on fly-by-wire aircraft, covering both military and commercial applications. The scope this course covers the issues related to the mechanical design of actuators themselves, as well as their control electronics. Additionally, this course will provide participants an overview of the design considerations behind these flight control actuation systems.

Learning Objectives
By attending this seminar, you will be able to:
  • Explain flight control actuation systems in military and commercial aircraft fly-by-wire systems
  • Identify key design considerations of control actuators
  • Identify the design considerations of actuator control electronics
  • Evaluate overall design considerations of flight control actuation systems
Who Should Attend
This seminar is designed for engineers and other key personnel with little or no previous flight control actuation knowledge.
Prerequisites
None
Seminar Content
  • Actuation System Architectures
    • Centralized electronics
    • Remote electronics
    • Redundancy schemes (hydraulic and electronic)
  • Typical Requirements
    • Operating modes
    • Hinge moment (stall force)
    • Stroke
    • Rates
    • Position accuracy
    • Dynamic response and stability
    • Static stiffness
    • Dynamic stiffness
    • Endurance
    • Leakage
    • Safety and Reliability
    • Interfaces
    • Envelope
    • Weight
  • Design Considerations
    • Balanced versus unbalanced piston areas
    • Piston sizing
    • Stroke
    • Servovalve parameters
    • Flow passages
    • Sensor selection
    • Logic valves
    • Seal selection
    • Control loops, position and load sharing
    • Loop gain
    • Monitors
Instructor(s): W. Scott Schaefer
W. Scott Schaefer has been employed at Moog Inc. for thirty- five years, mostly in the aircraft flight control arena. He has held various management and engineering positions, including key positions in the development of various aircraft actuation systems, including the DHC-8, X-¬29, B-2, V-22, F-35, B-787 and KC-46 refueling boom. Before joining Moog, Mr. Schaefer was a Senior Systems Engineer at Link Aviation where he helped develop motion systems and control loading systems for Link¿s line of flight simulators. He is a member of the SAE- A-6 Aerospace Actuation, Control and Fluid Power Systems committee and is currently the Chairman of the Actuation and Control subcommittee. For over twenty years, Mr. Schaefer has held offices in a number of committees and sponsored numerous technical documents. He received both his B.S. and M.S. degrees in Mechanical Engineering from The Ohio State University and also an MBA from the State University of New York at Binghamton.
Fees: $295 SAE Members*: 295
* The appropriate SAE Member discount will be applied through the Registration process.  Discounts vary according to level of membership: Elite Member 20%; Premium Member 15%; Classic Member 10%
CEU .4