一种双量程传感器的动力学建模与仿真

发布时间：2018-05-10 12:20

本文选题：双量程传感器 + MATLAB分析软件　；参考：《内蒙古工业大学》2017年硕士论文

【摘要】：随着世界各航天大国对大推力火箭技术应用需求的提高,火箭发动机作为航天事业的“心脏”也获得了极大地投入。推力测试技术作为火箭发动机实验中一项最为关键的内容,为发动机的研发与优化提供了必要的数据支撑,也是判断固体火箭发动机是否运行良好的关键指标。固体火箭发动机实际工作时,有推力大、时间短、推力持续变化等特点,对于固体火箭发动机一系列复杂的运行过程,如何准确测量其推力,满足精度高、推力比大、推力动态变化等测量要求成为研究固体火箭发动机的重中之重。针对这个复杂的情况,本文结合前人的经验总结,设计出一款双量程传感器,有效的满足了这些要求,使得火箭发动机在推力较小时可以精确测量发动机推力,而在推力较大的阶段时又可以满足大量程测量,并保护小量程传感器,为火箭发动机的动态性能研究,提供了必要保障。本文主要以前人的理论研究为基础,介绍了双量程传感器的工作原理,并且进行了危险构件的冲击力验算,保证了安全要求。通过建模,建立理论的数学模型,进行了理论计算,获得结构的固有频率、振型。并利用MATLAB分析软件,对双量程传感器进行了运动状态仿真,以及输出力仿真,再通过冲击试验与仿真结果的比较,判断仿真结果误差,数学模型是否可以满足实际要求。通过锤击实验测量得到大、小量程传感器的输入输出数据,利用MATLAB分析软件,通过信号处理获得大、小量程传感器的传递函数以及BODE图、实频与虚频等相关结果。通过实验与理论分析结合,为双量程传感器的优化改进提供了理论支持。本文对双量传感器进行了动力学建模与仿真,利用MATLAN软件得出大小量程传感器的传递函数,很好的对该型传感器进行了理论补充,为双量程传感器的发展起到了一定作用。
[Abstract]:With the increasing demand of the large thrust rocket technology in the world, the rocket engine as the heart of the aerospace industry has been greatly invested. As one of the most important contents in the rocket engine experiment, thrust test technology provides the necessary data support for the research and development and optimization of the engine, and is also the key index to judge whether the solid rocket motor is running well or not. The solid rocket motor has the characteristics of large thrust, short time, continuous change of thrust and so on. For a series of complicated operation process of solid rocket motor, how to accurately measure its thrust force to meet the high precision and high thrust ratio, The measurement of dynamic change of thrust has become the most important task in the study of solid rocket motor (SRM). In view of this complex situation, combined with the previous experience, this paper designs a dual-range sensor, which can effectively meet these requirements, so that the rocket engine can accurately measure the thrust of the engine at a relatively small thrust. At the stage of high thrust, a large number of range measurements can be satisfied and small range sensors can be protected, which provides a necessary guarantee for the study of the dynamic performance of rocket engines. In this paper, the working principle of double range sensor is introduced, and the impact force of dangerous component is checked to ensure the safety requirement. Through modeling, the mathematical model of the theory is established, and the theoretical calculation is carried out, and the natural frequency and mode shape of the structure are obtained. The simulation of the motion state and the output force of the dual-range sensor is carried out by using the MATLAB analysis software. Through the comparison of the results of the impact test and the simulation, the error of the simulation results and whether the mathematical model can meet the practical requirements are judged. The input and output data of large and small range sensors are obtained by hammering experiment. By using MATLAB analysis software, the transfer function of large and small range sensors, BODE diagram, real frequency and virtual frequency are obtained by signal processing. Through the combination of experiment and theoretical analysis, it provides theoretical support for the optimization and improvement of dual range sensor. In this paper, the dynamic modeling and simulation of the dual sensor is carried out, and the transfer function of the size range sensor is obtained by using MATLAN software, which is a good theoretical supplement to this type of sensor, and plays a certain role in the development of the dual range sensor.
【学位授予单位】：内蒙古工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：V433.9;TP212

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