ELECTRICAL, ELECTRONICS, AND AVIONICS
Topical Outline • EMA Configurations
Electrohydraulic Servovalves in Flight Control and Utility Actuators .5 Day | Classroom Seminar (Available for Private Delivery Only) I.D.# C1303 This four-hour short course intends to present an overview of electrohydraulic flow control servovalves commonly used in flight control and utility actuators. The scope of this course covers the history and design of servovalves, as well as their most common performance characteristics. This course will provide participants an understanding of the application of electrohydraulic servo- valves in hydraulically powered actuators and preparation of the servovalve procurement specification. Learning Objectives By attending this seminar, you will be able to: • Recognize differences between various types of electrohydraulic servo valves. • Understand terminology specific to electrohydraulic servo valves. • Identify key performance characteristics. • Evaluate effects of the servo valve characteristics on performance of a control actuator. • Prepare design specification for electrohydraulic servo valve. Prerequisites This seminar is designed for engineers and other key personnel involved in the design and specification of hydraulically powered flight and utility control actuation systems including fluid power, electrical, and systems engineering disciplines.
−− Rotary −− Linear −− Redundancy schemes • Typical Requirements −− Operating modes −− Loads (applied, generated, and duty cycle) −− Stroke −− Rates −− Life −− Stiffness −− Other typical requirements from ARP5812 • Actuator Components −− Motors −− Gears −− Ball Screws −− Roller Screws −− Stops −− Brakes −− No-backs −− Torque Limiters −− Sensors −− Failure Mechanisms −− Dampers −− Controllers - a few leading considerations • Considerations −− Jams −− Efficiency −− Back-drivability and load holding −− Uncommanded motion −− Sealing vs venting −− Latency −− Heat dissipation, temperature, and cooling −− Materials, processes, and allowables
Topical Outline • Overview of Electrohydraulic Servo valves −− History of development of servo valves −− Control function (flow vs. pressure control) −− Architecture (single vs. two-stage) • Servo valve Specific Terminology −− Electrical characteristics −− Steady-state performance characteristics −− Dynamic performance characteristics • Specification Considerations
−− Test duration and acceleration −− Space, envelope, form factor • Performance Analysis −− Static −− Dynamic
Instructor: Fee: $835
David Manzanares
−− Typical Requirements −− Effects of tolerances −− Test methods and equipment −− Quality assurance considerations
.4 CEUs
URL:
sae.org/learn/content/c1207/
Instructor: Fee: $425
Roman Simkin
.4 CEUs
URL:
sae.org/learn/content/c1303/
4
3 ways to get a no-obligation price quote to deliver a course to your company: Call SAE Corporate Learning at +1.724.772.8529 | Fill out the online quote request at sae.org/corplearning | Email us at Corplearn@sae.org
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