The aeronautical industry is constantly evolving in terms of efficiency,consumption, accessibility, environmental impact and, in particular, safety. Each product, whether it is intended for civil or military use, is subject to continuous study and validation in order to meet compliance requirements. Nowadays, thankfully, the use of computers and calculators has made this process easier and faster, as well as more accurate. One of the main steps to validate and study a product is to simulate its behaviour digitally. Not only this process allows a more complex study, but it also saves time and costs. This thesis will examine this study and the validation process for a servovalve model in an electro-hydraulic control system.