Design and simulation of RLPG electro hydraulic quantiative servo filling system

DOI:	10.11809/bqzbgcxb2023.05.013
Keywords:	liquid propellant gun; electro hydraulic quantitative servo; filling system; fuzzy sliding mode variable structure control; co simulation
Abstract:	In order to realize automatic filling of a regenerative liquid propellant gun (RLPG), this paper designs an electro hydraulic quantitative servo filling system. The amount of charge emitted in a rodless cavity is adjusted in real time by controlling the piston displacement in a valve controlled quantitative cylinder. In practical application, the quantitative process has no impact with the reset process and the gun firing process, and can work in parallel with the latter two processes. Aiming at its uncertainty and nonlinearity, a state space model of the electro hydraulic servo system model is established. In order to improve chattering controlled by the sliding mode variable structure, a fuzzy sliding mode variable structure controller is designed for the system. An AMESim/Simulink co simulation platform is built, and a simulation analysis of the system is carried out under different charge amounts. The results show that, with a total of 0.95 s to fill 0.628 3 L of the liquid propellant, the time required for the quantitative process is much shorter than the sum of the RLPG launch time and the reset time of the gun propellant variable charge piston. With an increase of charge amount, quantitative accuracy of the system decreases, but it remains above 99.85%.
Issue:	Vol. 44 No. 5 (2023)
Published:	2023-05-28
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