运载火箭一级加泄连接器自动控制技术研究

Research on the Automatic Control Process of the First Stage Launch Vehicle Fuel Connector

摘要:

运载火箭一级加泄连接器是实现一级贮箱推进剂加注与泄回的核心设备，针对当前国内一级连接器主要采用人工对接的情况，对气动驱动的加泄连接器的自动控制技术进行研究；分析了连接器机构的结构与对接脱落的主要步骤，设计采用PLC组合、直流电源、传感器供电组合等的硬件系统对连接器配气台的传感器参数进行采集，对电磁阀进行控制以驱动机构运动；设计控制软件，对基础数据进行分类构建，并基于面向对象思想设计多粒度层次的流程步骤，可通过嵌套组合不同粒度的步骤实现复杂的控制逻辑，采用xml文件描述流程步骤；介绍了自动对接、脱落控制流程的流程内容；经测试自动对接流程与自动脱落流程所用时间分别为133 s与97 s，满足使用要求，且已在某型号多次任务中进行了应用，有力地支撑了型号任务的发展。

Abstract:

The first-stage fuel connector of launch vehicle is the core equipment to realize the propellant filling and discharge of the first-stage tank. In view of the current situation that the first-stage connector in China mainly adopts manual docking, the automatic control technology of the pneumatically driven fuel connector is studied. The structure of the connector mechanism and the main steps of docking and falling off are analyzed. The hardware system of PLC combination, DC power supply and sensor power supply combination is designed to collect the sensor parameters of the connector gas distribution table, and the solenoid valve is controlled to drive the mechanism movement. The control software is designed to classify and construct the basic data, and the multi-granularity level process steps are designed based on the object-oriented idea. The complex control logic can be realized by nesting and combining the steps of different granularity, and the process steps are described by XML file. The process content of automatic docking and falling off control process is introduced. The test results show that the time of automatic docking process and automatic falling off process is 133 s and 97 s respectively, which meets the requirements of use, and has been applied in several tasks of a certain type, which strongly supports the development of model tasks.