The design of an airplane hydraulic system must be performed in an integrated form: in fact different configuration choices regarding each subsystem can appreciably affect the pumps sizing and the system stability. The proposed work evaluates the interactions between the different design choices, regarding both the power generation/regulation and users in all the aspects important for the operation of the complete system, in order to outline the effects that the design of a defined hydraulic system of an airplane produces in given operating conditions. To this purpose a new dynamic simulation models (and the related numerical simulation programs), capable of analyzing the behavior of the complete system, have been developed; employing it a series of investigations was carried out, aiming to analyze the dynamic behavior of different configurations of the system in similar operating conditions. In particular, the present work proposes a new method capable of preventing major interactions by limiting the actuation speed in aiding load conditions and, in order to evaluate its performances, compares it with another method previously proposed. The above mentioned methods concerns the employment of a nonlinear actuation speed control law acting in the aiding load conditions or the implementation of a ramp generator in the control law of the critical users. In conclusion, the paper compares the advantages and shortcomings of the two solutions (nonlinear speed control law and ramp generator); as it is usual in these cases, the cheaper solution is not necessarily the best one, in terms of actuation rate control capability. The present work focuses all the considerations regarding the design activities.

Proposal of a Nonlinear Speed Control Law Method Preventing Interactions Problems in Hydraulic Systems / Borello, Lorenzo; DALLA VEDOVA, MATTEO DAVIDE LORENZO; Maggiore, Paolo. - STAMPA. - (2016), pp. 22-28. (Intervento presentato al convegno 18th International Conference on Automatic Control, Modelling & Simulation (ACMOS '16) tenutosi a Venice, Italy nel January 29-31, 2016).

Proposal of a Nonlinear Speed Control Law Method Preventing Interactions Problems in Hydraulic Systems

BORELLO, Lorenzo;DALLA VEDOVA, MATTEO DAVIDE LORENZO;MAGGIORE, Paolo
2016

Abstract

The design of an airplane hydraulic system must be performed in an integrated form: in fact different configuration choices regarding each subsystem can appreciably affect the pumps sizing and the system stability. The proposed work evaluates the interactions between the different design choices, regarding both the power generation/regulation and users in all the aspects important for the operation of the complete system, in order to outline the effects that the design of a defined hydraulic system of an airplane produces in given operating conditions. To this purpose a new dynamic simulation models (and the related numerical simulation programs), capable of analyzing the behavior of the complete system, have been developed; employing it a series of investigations was carried out, aiming to analyze the dynamic behavior of different configurations of the system in similar operating conditions. In particular, the present work proposes a new method capable of preventing major interactions by limiting the actuation speed in aiding load conditions and, in order to evaluate its performances, compares it with another method previously proposed. The above mentioned methods concerns the employment of a nonlinear actuation speed control law acting in the aiding load conditions or the implementation of a ramp generator in the control law of the critical users. In conclusion, the paper compares the advantages and shortcomings of the two solutions (nonlinear speed control law and ramp generator); as it is usual in these cases, the cheaper solution is not necessarily the best one, in terms of actuation rate control capability. The present work focuses all the considerations regarding the design activities.
2016
978-1-61804-362-7
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11583/2642533
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