摘要
介绍了激光干涉法测微小转角的原理及测量方法,提出了采用激光干涉测量微冲量的方法,将激光与靶作用产生的微冲量转化为扭摆的转动角度,通过激光干涉法测量此微小转角从而计算出冲量。相同单脉冲能量下,以PVC+2%C为工质,用扭摆法测量了激光与工质作用产生的微冲量,结果表明该测试系统分辨率为2×10-8N.s,量程为2×10-7~0.8×10-5N.s。
The measurement principle of tiny-angle using laser interference method is introduced. This method is used to measure micro-impulse. The impulse can be obtained by measuring tiny rotation-angle of torsion pendulum. The micro-impulses are measured with a torsion pendulum using PVC + 2% C as target under the same single pulse energy condition. The experimental results indicate that the resolution of measurement system is of 2 × 10 ^-8N· s and the range is between 2 × 10 ^-7 and 0.8×10^-5N·s.
出处
《推进技术》
EI
CAS
CSCD
北大核心
2010年第1期119-122,共4页
Journal of Propulsion Technology
基金
国家"九七三"项目(61328)
国家自然科学基金项目(90916015)
关键词
微冲吊测量
扭摆
激光干涉
小角度测量
激光微推力器
Micro-impulse measurement
Torsion pendulum
Laser interference
Tiny-angle measurement
Micro-la ser plasma thrusters