The electrical part of the power chain of electromechanical actuators (EMA) is similar to that of electro‐hydrostatic actuators (EHA) in terms of Power‐by‐Wire (PbW) power transmission for critical functions. The essential difference between them is that power transmission between motor and load is purely mechanical in EMAs and hydrostatic in EHAs. This offers interesting opportunities for designers. EMAs have been used in aerospace for many decades for fractional horsepower or low‐criticality functions. The need to develop electromechanical actuation has been further stressed by the recent interest in drones, which can reach several tons in mass. By the mid‐1980s, the EMAS program had enabled the development and flight testing of a linear EMA with remote electronics for the Lockheed C‐141 aileron control. This actuator replaced the conventional actuator. Jamming is often less critical for secondary flight controls. PBW braking consists of using EMAs to apply axial force on the pack.
Electro‐mechanical Actuators
Aerospace Actuators 2 ; 171-217
2017-04-18
47 pages
Article/Chapter (Book)
Electronic Resource
English
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