基于超导差分加速度测量原理的微推力测量方案  

THRUST TEST SCHEME BASED ON THE MEASUREMENT PRINCIPLE OF SUPERCONDUCTING DIFFERENTIAL ACCELERATION

作　　者：贺建武[1] 邵明学[2] Ho Jung Paik 张天平[4] 

机构地区：[1]首都师范大学物理系,北京100028 [2]中国科学院应用数学研究所,北京100190 [3]Department of Physics,University of Maryland,College Park [4]兰州空间技术物理研究所,甘肃兰州730000

出　　处：《真空与低温》2013年第4期208-213,共6页Vacuum and Cryogenics

基　　金：中国科学院战略性先导科技专项(XDA04070400);国家外专局高级外国专家项目(GDJ20130491002)

摘　　要：随着微推进技术的快速发展，微推力器推力的测试与标定也日益困难。为实现微推力的精密测量和动态特性测试，通过分析超导重力梯度仪的差分加速度测量原理、仪器的构成和原理电路等，提出了一种基于高温超导差分加速度测量原理和SQUID检测技术微推力测量方案，其推力测量范围为10^-7-10^-2N、测量频带从直流至4Hz。根据检验质量的动力学方程和超导回路磁通量守恒方程，导出了推力与输出差分电流的传递函数，分析了影响测量的主要噪声。方案可应用于微推力的测量，并有进一步提高推力测量精度的潜力。With the rapid development of micro-propulsion technology, it is increasingly difficult to test and calibrate the micro-thrust. According to the principle of differential acceleration of superconducting gravity gradiometer, we propose a design- to precisely test micro-Newton thruster based on high temperature superconducting and SQUID detecting technology, with range 10mN and accuracy and frequency band 4 . Transfer function of propeller thrust to output differential current is deduced based on kinetic equations of test masses and conservation equations of magnetic flux of superconducting loop. Some important noises are analyzed. Lastly, it is suitable for testing micro-thrust in addition to considerable potential of improving accuracy.

关 键 词：推力器 微推力测量 超导重力梯度仪 超导量子干涉仪 

分 类 号：V448.12[航空宇航科学与技术—飞行器设计]