Method for improving stability and reliability of large rocket liquid attitude control power system and storage box

Abstract

The invention discloses a method for improving the stability and reliability of a large rocket liquid attitude control power system and a storage box. The control of the change range of the mass center of the system is realized by adjusting the shape of the storage box and connecting fasteners. The two equator radiuses of the storage box are equal and are greater than the polar radius. A mounting surface is located on the outer surface of a high-pressure gas area hemisphere and does not coincide with an equator central plane. An odd number of asymmetric mounting holes are formed in the mounting surface, and the storage box is connected with a mounting plate through the mounting holes and the connecting fasteners. According to the method for improving the stability and reliability of the large rocket liquid attitude control power system and the storage box, the reliability of connection and fastening of a large-deformation pressure container such as the storage box under complex and changeable working conditions is ensured, the rate of turnover motion of a metal diaphragm is reduced, the variation range of the mass center of the system in the propellant consumption process is reduced, the safe and stable operation of the storage box is ensured, the working stability of the control system is improved, the difficulty of the control algorithm is reduced, and the predictability and reliability of the control process are improved.

Description

technical field [0001] The invention belongs to the technical field of design of single- and double-component liquid attitude control power systems, and in particular relates to a storage tank and a connection structure for the attitude control system, which are used to improve the stability of the control process of the attitude control system and ensure the safety of the pressure vessel of the storage tank. Safe and reliable installation and operation. Background technique [0002] The propellant management of the liquid attitude control power system of large rockets is usually stored in parallel storage tanks. , on the one hand, the storage tank will have a large radial expansion on the plane where the connecting surface is due to the pressurization. Displacement occurs in the direction of the mounting surface, which in turn leads to relative motion of the rigid bodies in the fluid communication area; in addition, the attitude control system will vibrate continuously dur...

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Problems solved by technology

[0002] The propellant management of the liquid attitude control power system of large rockets is usually stored in parallel storage tanks. , on the one hand, the storage tank will have a large radial expansion on the plane where the connecting surface is due to the pressurization. Displacement occurs in the direction of the mounting surface, which in turn leads to relative motion of the rigid bodies in the fluid communication area; in addition, the attitude control system will vibrate continuously during the working phase, resulting in large lateral vibrations, which will cause sliding between the mounting surface and the connecting surface of the tank Friction and wear of the contact surface will intensify as the working process progresses, and the vibration of the system will also increase; the storage tank is a high-pressure and large-deformation device, and its deformation is large during the working process. With the filling of gas and the use of propellant, its interface will Larger displacement occurs; in order to increase the payload and effective propellant carrying capacity of the system, make full use of the radial space of the system, and ensure the position of the center of mass of the system, the current common design uses a thin and tall tank, but this arrangement is at the expense of at the expense of some system reliability

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