In recent years, the aviation industry has been evolving towards simplifying aircraft systems while enhancing and reinforcing safety and reliability. Gradually, mechanical control systems have been replaced by fly-by-wire, reducing costs and complexity while maintaining high safety and precision in control. With the advent of the 'more electric' concept, systems previously powered by hydraulic energy are being replaced to address issues such as continuous maintenance, costs, redundancies, and system failures (Chapter 1). This work focuses particularly on those systems undergoing this evolution: electromechanical servovalves. Since the primary issue with introducing these actuators as control systems for secondary flight controls is their reliability (as little is known about them, having been introduced recently and lacking sufficient studies), Chapter 2 describes the aim of this work, which is to characterize and model a real EMA system through experimental testing on a test bench at the Polytechnic.