By Jean-Charles Mar?
This ebook is the 1st of a chain of volumes that disguise the subject of aerospace actuators following a systems-based procedure.
This first quantity presents common details 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 generally for all plane, together with more recent plane.
Currently, takeovers via significant enterprises of smaller businesses during this box is threatening the services of aerospace hydraulics and has unavoidably ended in a lack of services. additional elimination of hydraulics educating in engineering levels ability there's a have to capitalize efforts during this box with a view to circulate it ahead as a method of offering more secure, greener, more cost-effective and speedier aerospace services.
The themes coated during this set of books represent an important resource of data for people and engineers looking to research extra approximately aerospace hydraulics.
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Additional info for Aerospace Actuators 1: Needs, Reliability and Hydraulic Power Solutions
This consideration gives a better understanding of the “extremely improbable” label. In addition to the threshold values defined above, a generic requirement applies in all cases for commercial airplanes: no single failure should lead to a catastrophic event. 2. Response to failure The architecture and the technological choices selected to design a system depend heavily on the criticality of the functions the system performs. Where appropriate, the system can be designed to avoid failure Reliability 37 (resistance to failure) or to control failure in case one of its components has a fault (tolerance to failure).
11. Typical hydraulic system architecture. zip 2 Reliability This chapter briefly outlines the general concepts of reliability with a particular focus on redundancy architectures. It is important to pay close attention to the specific technical vocabulary used in this chapter. 1. Risks and risk acceptance Any system can potentially be dangerous, meaning it can cause harm to people, goods or the environment. Risk management consists of controlling the probability of systems being harmed when exposed to danger.
Conversely, redundancy is described as shared parallel when the failure rate of an active channel depends on its contribution to the function, which increases when other channels are failing. This behavior is typical of power transmission systems, where failure rate is tied to the amount of power generated. Furthermore, in power systems, the various channels mounted in parallel must deliver identical outputs in order to avoid force-fighting. It is therefore crucial to ensure they are synchronized.