Read e-book online Aerospace Actuators 1: Needs, Reliability and Hydraulic PDF

By Jean-Charles Mar?

ISBN-10: 1848219415

ISBN-13: 9781848219410

This booklet is the 1st of a sequence of volumes that disguise the subject of aerospace actuators following a systems-based procedure.

This first quantity offers basic info on actuators and their reliability, and makes a speciality of hydraulically provided actuators. Emphasis is wear hydraulic strength actuators as a know-how that's used commonly for all plane, together with more moderen airplane.

Currently, takeovers via significant agencies of smaller businesses during this box is threatening the services of aerospace hydraulics and has unavoidably resulted in a lack of services. extra removing of hydraulics educating in engineering levels ability there's a have to capitalize efforts during this box as a way to circulate it ahead as a method of delivering more secure, greener, more affordable and quicker aerospace services.


The themes lined during this set of books represent an important resource of knowledge for people and engineers trying to study extra approximately aerospace hydraulics.


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Additional info for Aerospace Actuators 1: Needs, Reliability and Hydraulic Power Solutions

Example text

This is equivalent to having two rods mounted in series (geometrically). Second, in the duplex solution, the two cylinder rods are connected at the stage of transmission to the load. This is equivalent to having two rods mounted in parallel (geometrically). The main difference between these two solutions is their 42 Aerospace Actuators 1 overall dimensions: the first is rather thin and long, while the other is shorter but wider. Triplex and quadruplex solutions sum efforts made by three or four rods at the stage of transmission to the load; the actuator body is made out of the assembly of three or four distinct bodies.

Goals and restrictions should also be considered from a global, lifecycle point of view, regarding new services that can be provided as well as risk, costs and environmental impact minimization. 5. 11 shows a hypothetical power architecture of an aerospace hydraulic system. Without going into details, the first step is to visualize the architectural concepts applied to carry out the most generic functions of hydraulic power transmission, which are: – convert power between the hydraulic and mechanical domains; – transport hydrostatic power using properly conditioned hydraulic fluid; – dose the power transmitted to the load; – manage (distribute/transmit) power as a function of life stages, reliability constraints and response to failure.

This is why hydraulic actuators of primary flight controls became non-reversible. In France, such irreversible servo-controls were developed by Jacottet-Leduc in 1950 who built the first three-axis servo-controlled plane: the Sud-Ouest S0 1021 Espadon. The road was now paved for French supersonic fighter jets. 10) servos the position of the cylinder rod to the position of the control rod. For reliability reasons, it is powered by a double hydraulic power source (main and backup) with constant pressure.

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Aerospace Actuators 1: Needs, Reliability and Hydraulic Power Solutions by Jean-Charles Mar?

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