摘要
针对当前测试微机械陀螺动态参数存在耗时长、效率低等缺点,提出了一种新的测试陀螺动态参数的方法,该方法通过Lab-VIEW编写的测试软件控制一数据采集卡和信号调理电路激励陀螺振动并采集其驱动方向上的振动数据,从采集的振动数据中提取出波峰和波谷进行指数拟合获取陀螺的衰减系数和固有频率,最后根据阻尼振动方程计算出陀螺的阻尼比和谐振频率,同时获取陀螺的品质因子;该方法能够实现自动记录和处理陀螺的振动数据;整个测试过程只需15s左右,提高了测试效率;利用该方法测试了30种不同气压下陀螺的品质因子,得到的陀螺的品质因子与气压值的关系曲线和理论研究结果相符,从而为陀螺动态参数的测试提供了一种有效的手段。
For the current method test dynamic parameters of Micro--machined Gyroscope has some defects, such as time--consuming and low efficiency, a new method test dynamic parameters of gyroscope is put forward in this paper, this method control a data acquisition card and signal regulate circuit to drive gyroscope vibrate and collect the vibration data on the drive direction of gyroscope by a test software written in the LabVIEW, then extract peaks and troughs from the vibration data to get the attenuation coefficient and the inherent frequency of gyroscope through index fitting, finally calculated the damping ratio and the resonant frequency of gyroscope according to the damping vi- bration equation and get the quality factor at the same time. The method can realize recording and processing the vibration data of gyroscope automatieally. Tb.e entire testing process takes about 15 seeortds, so this method has improved the test efficiency. Using this method tested the quality factor of the gyroscope in 30 different pressure, the relation curve of quality factor and the pressure value is conform to the theo retical results, thus this paper provide an effective means for the dynamic parameter test of gyroscope.
出处
《计算机测量与控制》
北大核心
2013年第3期580-582,585,共4页
Computer Measurement &Control
基金
航空科学基金(20110868001)
