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U. Kling, M. Hornung
The electrification of aircraft subsystems is one focus of aerospace research to increase the efficiency of aircraft. Especially the replacement of the conventional centralized hydraulic system with its dedicated actuators for flight controls and landing gear retraction are considered in this context. Two alternative actuator types are investigated as possible replacement. The first alternative actuator type is the Electro Mechanical Actuator (EMA) and the second one is the Electro Hydrostatic Actuator (EHA). In this work, simplified weight estimation methods from literature as well as developed methods are used to estimate the weight of the different components an EMA or EHA consists of. These methods are used to estimate the weight of the different actuator types for landing gear retraction. The influence of different landing gear parameters on the actuator weight is presented. These landing gear parameters are the weight of the landing gear, the distance of the center of gravity of the landing gear to the revolution axis around which it is retracted and the available lever arm of the actuator, which corresponds to the required force. A case study is performed comparing the two different actuators for a conventional wing mounted landing gear with a shorter fuselage integrated body landing gear. For both actuator types the shorter body landing gear led to a lighter actuator compared to the longer conventional landing gear. In the comparison of the actuator types itself, the EMA resulted to be lighter than the EHA for the body landing gear.
Deutscher Luft- und Raumfahrtkongress 2019, Darmstadt
Deutsche Gesellschaft für Luft- und Raumfahrt - Lilienthal-Oberth e.V., Bonn, 2021
21,0 x 29,7 cm, 8 Seiten
Stichworte zum Inhalt:
Landing gear, actuation
Kling, U.; Hornung, M. (2021): Preliminary Weight Estimation for different Actuator Types for Landing Gear Retraction. Deutsche Gesellschaft für Luft- und Raumfahrt - Lilienthal-Oberth e.V.. (Text). urn:nbn:de:101:1-2021092209443987934120.