摘要
燃气陀螺仪是一种依靠火药燃气驱动的陀螺本体为机械框架式结构的惯性陀螺仪,它能够准确地测出弹体在飞行过程中随时间变化的姿态角,是弹体控制回路中的关键测量部件,其在不同振动环境中的漂移控制技术对制导武器弹体姿态的准确测量非常重要。本文利用欧拉方法,推导了陀螺仪的测量原理和漂移产生机理,分析了摩擦力矩、不平衡力矩,以及弹体环境施加的外力矩对陀螺漂移度的影响,并设计燃气陀螺仪的扫频振动试验找到陀螺对外加力矩的敏感频率。试验结果表明,在敏感频率400～800Hz范围内,通过改善弹体安装环境,可将陀螺仪漂移从大于3°减少至0.5°范围内。该方案具有较高的工程实用价值。
Gas gyro is an inertial gyro which measures the attitude angle of missile body by using propellant gas to drive for realizing the sample control of airframe attitude. Based on the characteristics of high-speed rotor, the gyro can measure the attitude of the airframe directly through the gyro＇s frame deviation. Using Euler movement equations, we deduce the mechanical gyroscope measurement principle and the causes of drift, and analyze the effect of friction torque, unbalanced torque, and external moment on the gyro drift. The sweep-frequency vibration test is designed which find the sensing frequency of the gas gyro under the applied torque. The test show that the gyro drift of more than 3 ° can be reduced to 0.5°under 400-800 Hz sensitive frequencies through improving the assemble condition of the missile body.
出处
《中国惯性技术学报》
EI
CSCD
北大核心
2010年第1期111-114,共4页
Journal of Chinese Inertial Technology
关键词
陀螺仪
姿态测量
漂移控制
力矩
扫频振动
gyro
attitude
drift control
torque
sweep-frequency vibration
