A NEW SERVOVALVE SIMPLIFIED FLUID DYNAMIC MODEL SENSITIVE TO SYSTEM HYDRAULIC CAPACITIES

Alessandro Aimasso¹, Parid Alimhillaj², Matteo Bertone¹, Carlo G. Ferro¹, Matteo D. L. Dalla Vedova¹*

¹ Department of mechanical and aerospace engineering, Politecnico di Torino, Italy
² Energy Department, Faculty of Mechanical Engineering, Polytechnic University of Tirana, Albania
* Corresponding author: matteo.dallavedova@polito.it

ABSTRACT: Designing modern flight control systems requires highly detailed models to analyse individual components or subsystems. However, for tasks like preliminary design, monitoring, diagnostics, or prognostics, simpler yet sufficiently accurate models are necessary. Literature offers various simplified numerical solutions that can simulate the fluid dynamic behaviours of specific valve geometries with varying levels of detail and accuracy. These simplified models usually calculate the differential pressure regulated by the valve based on its spool opening and the flow rate it manages. In certain applications, such as asymmetric hydraulic jacks, regenerative actuators, or systems where fluid compressibility is significant, models focused solely on differential pressure are insufficient. Instead, new simplified fluid dynamic models are needed to determine the flow rate delivered by the valve as a function of spool displacement and differential pressure. This paper introduces a new synthetic fluid-dynamic valve model - a lumped parameters model with a semi-empirical formulation - that considers spool position, hydraulic capacity, variable supply pressure, and leakage between the output ports connecting the valve to the motor element.

KEYWORDS: Flight control systems, Servovalve, Simplified numerical model, Synthetic fluid-dynamic valve model

DOI: https://doi.org/10.69076/jomac.2024.0021

CITATION: A. Aimasso, P. Alimhillaj, M. Bertone, C. G. Ferro and M. D. L. Dalla Vedova, A NEW SERVOVALVE SIMPLIFIED FLUID DYNAMIC MODEL SENSITIVE TO SYSTEM HYDRAULIC CAPACITIES, International Journal of Mechanics and Control, Vol. 25, No. 01, pp. 161-171, 2024, https://doi.org/10.69076/jomac.2024.0021

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