模拟月壤的物理特性参数测量关键技术研究

发布时间：2018-06-05 22:46

  本文选题：模拟月壤 + 热特性　； 参考：《沈阳理工大学》2016年硕士论文

【摘要】：月球表面的温度和热物性参数是月表热环境的两个主要内容,是研究月球内部热演化模型的基本边界条件,也是解译微波探测数据的必要参数。从科学意义上讲,获取真实可靠的月面热物性参数,可以使我国掌握比较精确、可靠、完整的月面热环境特性数据,填补我国在月面热环境特性知识方面的空白,为建立月球基地和进一步开发研究奠定必需的热环境认识基础;从工程应用角度看,以简单而粗略的热环境参数为依据的热控设计将难以满足探测器月面活动的需要,必须进一步获取详细、准确的月面热物性数据。月壤硬度是指月面探测机械的动静载荷传递于土壤上,土壤对这些外荷力所发挥的抵抗力。因此测量这种土壤性质对月面探测,甚至将来的基地建设都是必不可少的理论依据。本文首先研究了地面土壤硬度测量原理,且最终选用比较有代表性的圆锥指数,作为衡量模拟月壤硬度的参数,并指导模拟月壤硬度传感器的设计;同时,研究了土壤热特性测量原理,且选择了比较适合用于粉末状材料热特性测量的热探针原理,用于指导模拟月壤热特性测量传感器的设计。然后,在以上测量理论的指导下,进行硬度传感器和热特性测量传感器的前端结构研究和设计、嵌入式软硬件系统的设计。硬度探头的设计,包括弹性体的设计和应变片的选择、粘贴与防护;热特性传感器的前端设计——热探针,包括加热器设计、探针护套设计和温度测量元件选择;嵌入式系统,主要包括数据采集电路、主控电路和基于μC/OS-Ⅱ的多任务管理系统。其次,改进常用的数字滤波算法,设计了动态限幅均值滤波的数字滤波器,以适用于本文的温度数据和硬度数据,并用Matlab仿真验证了该滤波器可行性;然后通过采集到的应变片输出数据转化得到硬度数据,改进用于热特性反演粒子群优化算法以提高算法的效率和适用性,并仿真验证其可行性。最后,对设计好的传感器软硬件模块进行了单独校正和整体标定,并通过实验给出了模拟月壤的硬度传感器测量数据和热特性反演结果。
[Abstract]:The temperature and thermophysical parameters of the lunar surface are two main contents of the lunar surface thermal environment. They are the basic boundary conditions for the study of the lunar interior thermal evolution model and the necessary parameters for the interpretation of microwave data. Scientifically speaking, obtaining real and reliable thermal physical parameters of lunar surface can make our country master more accurate, reliable and complete data of thermal environmental characteristics of lunar surface, and fill in the blank of knowledge of thermal environmental characteristics of lunar surface in our country. From the point of view of engineering application, the thermal control design based on simple and rough thermal environmental parameters will be difficult to meet the needs of lunar surface activities. Detailed and accurate data on the thermal properties of the lunar surface must be obtained further. Lunar soil hardness refers to the resistance of the soil to these external forces when the dynamic and dynamic loads of the lunar surface detection machinery are transferred to the soil. Therefore, the measurement of soil properties is an essential theoretical basis for lunar surface detection and even future base construction. In this paper, the measuring principle of soil hardness on the ground is studied, and the representative cone index is chosen as the parameter to measure the hardness of the simulated lunar soil and to guide the design of the sensor for simulating the hardness of the lunar soil. The principle of soil thermal characteristic measurement was studied and the principle of thermal probe which was suitable for the measurement of thermal characteristics of powdered materials was selected to guide the design of sensor for simulating lunar soil thermal characteristics. Then, under the guidance of the above measurement theory, the research and design of the front end structure of hardness sensor and thermal characteristic measuring sensor, and the design of embedded software and hardware system are carried out. Hardness probe design, including elastomer design and strain gauge selection, adhesion and protection; front end design of thermal characteristic sensor-thermal probe design, including heater design, probe sheath design and temperature measurement element selection; embedded system, It mainly includes data acquisition circuit, main control circuit and multitask management system based on 渭 C / OS- 鈪，

本文编号：1983717