Size estimation tools for conventional actuator system prototyping in aerospace

摘要

Predicting the size of an actuator capable of reaching given performance requirements is a critical step for any systems design. Thus, to help in the prototyping and early development stages of such devices, simple mathematical models were developed, which can be used with little knowledge in actuation system design. Based on physical phenomenons at the heart of the actuation mechanism, these models can be used to estimate diameter and length, and therefore volume and weight of conventional actuators as a function of performance requirements. Models include linear hydraulic pistons and electric motors, divided into radial and axial flux machines. Off-the-shelf actuators and more aerospace specific products were used to validate and assess the accuracy of the models over a wide range of force and torque requirements. Simple sizing examples for aerospace actuation systems are also given as use-cases of the different tools. A discussion on model applicability, for various aircraft scales and applications concludes the paper.