Method and device for designing molded surface of valve rod of gas valve of solid attitude and orbit control engine

Abstract

The invention provides a solid attitude and orbit control engine gas valve rod profile design method and device. The solid attitude and orbit control engine nozzle profile curve and target equivalent throat area curve requirements are given; according to the equivalent throat area corresponding to the first valve rod displacement step, determining a tangent point of a valve rod local molded surface corresponding to the first valve rod displacement step and the molded surface of the spray pipe on the molded surface curve of the convergent section of the spray pipe; determining a valve rod profile coordinate point on a valve rod local profile corresponding to a first valve rod displacement step near the tangent point by utilizing local linear expansion; and on the basis of the target equivalent throat area curve, calculating a local Taylor expansion slope by adopting a binary search method, determining a valve rod profile coordinate point on a valve rod local profile corresponding to the next valve rod displacement step, continuing recursive iteration until the valve rod displacement reaches the maximum stroke, obtaining all valve rod profile coordinate points, and finally obtaining a valve rod profile curve. The linear relation between the displacement of the valve rod and the equivalent throat area can be guaranteed.

Description

technical field [0001] The invention belongs to the technical field of valve surface profile design, and in particular relates to a method and device for designing a valve stem profile of a solid attitude rail-controlled engine gas valve. Background technique [0002] As the actuator of the kinetic energy interceptor, the gas-fired solid attitude control engine has a simple structure, is safe and reliable, and is especially suitable for intercepting weapon systems such as air-based and sea-based that have high security requirements. For gas-type solid attitude control engines, the process of thrust regulation largely depends on the geometry of the valve stem, the nozzle profile and the relative relationship between the valve stem and the nozzle. When the opening of a single valve varies nonlinearly with the valve stem stroke, it is difficult for the total opening of the valve to remain constant during the movement of each valve stem from the current moment position to the ne...

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Problems solved by technology

[0006] Aiming at the technical problems such as complex profile design process and poor design results in the process of realizing the linearization of valve stem displacement and equivalent throat area of ​​solid attitude control gas power valve, the invention proposes a solid attitude control engine gas power valve. Valve stem profile design method and device

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