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DESIGN IMPROVISATION OF ELECTRO- MECHANICAL ACTUATORS FOR OPERATION AT SUB ZERO TEMPERATURES

Control surface actuators are the key systems in any flight vehicle for enabling a strict control on the flight parameters. The electromechanical actuator developed for an Unmanned aerial vehicle (UAV) is subjected to sub-zero temperatures due to the altitude of operation. This paper discusses on how an actuator developed is studied experimentally and improvised in design to ensure performance at -40 o C. The experimental observations are reasoned and supported by theoretical studies and remedial measures incorporated to improve the actuator performance.