Numerical Simulation for Redundant Electro-Hydrostatic Servo-Actuators under Certain Special Conditions

Liviu Dinca, Radu Bogateanu, Jenica-Ileana Corcau (), Alexandru Dumitrache and Bogdan Suatean
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Liviu Dinca: Department of Electrical, Energetic and Aerospace Engineering, Faculty of Electrical Engineering, University of Craiova, 200441 Craiova, Romania
Radu Bogateanu: I.N.C.A.S.—National Institute for Aerospace Research, “Elie Carafoli”, 061126 Bucharest, Romania
Jenica-Ileana Corcau: Department of Electrical, Energetic and Aerospace Engineering, Faculty of Electrical Engineering, University of Craiova, 200441 Craiova, Romania
Alexandru Dumitrache: I.N.C.A.S.—National Institute for Aerospace Research, “Elie Carafoli”, 061126 Bucharest, Romania
Bogdan Suatean: Faculty of Aerospace Engineering, “Politehnica” University, Bucharest, 011061 Bucharest, Romania

Energies, 2022, vol. 15, issue 16, 1-13

Abstract: This work presents some numerical simulations, performed using AMESim software, for a system composed by two redundant servo-actuators. Certain operating conditions are taken into account for these two electro-hydrostatic servo-actuators, which are coupled to the command surface (aileron) of a transport aircraft. We first considered the situation of slight asymmetries in the construction of the servo-actuators, then a situation in which one servo-actuator fails at maximum flight speed, and then at a medium flight speed, and finally we considered the effect of gusts upon the system. Small differences in the construction of the servo-actuators were taken into consideration by modifying each of the pump displacements, one by +2% and one by −2%, from the nominal value. It is possible that many other asymmetries exist in the construction of servo-actuators, such as different liquid leakages in the cylinders or pumps, small differences in the controller coefficients, and so on. These differences should be taken into account in future works. Our results provide evidence that, under some operation situations of redundant servo-actuators, significant overstresses can appear in one servo-actuator, leading to a decrease in the time for which the system operates correctly.

Keywords: electro-hydrostatic; servo-actuators; numerical simulation; AMESim software (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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