微机械陀螺零偏温度梯度建模  

Temperature grads modeling of zero bias for micro mechanical gyroscope

作　　者：罗兵[1] 尹文[1] 江明明[1] 吴美平[1] 

机构地区：[1]国防科技大学机电工程与自动化学院,长沙410073

出　　处：《电光与控制》2008年第11期29-31,共3页Electronics Optics & Control

基　　金："八六三"项目基金资助(2006AA12Z319)

摘　　要：针对微机械陀螺在启动过程中与达到热平衡后的温度特性不一致的特点开展温度梯度建模研究工作。实验表明陀螺在启动过程中由于内部温升引起的相对环境温度的梯度变化成为了影响陀螺精度的主要因素。为了抑制陀螺的初始热漂移,分析了不同的开机起始温度点下陀螺补偿模型参数与温度的关系,提出了一种基于起始工作温度点计算模型参数的算法,并进行了补偿。结果表明陀螺零偏随温度基本保持不变,零偏稳定性由补偿前的76.942℃/h改善为8.687℃/h,性能提高了一个数量级。We studied the temperature grad modeling of zero bias for the micro mechanical gyroscope, which has different temperature property during and after warming up. Experiments showed that temperature grads caused by inner temperature increase during warming-up is the main factor degrading the accuracy of the gyroscope. To suppress the thermal drift of zero bias, we analyzed the relationship between the parameters of the compensation model and the temperatures when using different starting temperature, put forward a method for calculating the parameters based on starting operational temperature and made compensation. The results show that the thermal drift of zero bias is suppressed, and the zero bias stability is improved from 76. 942 ℃/h to 8.687 ℃/h.

关 键 词：微机械陀螺 温度误差 梯度模型 温度补偿 

分 类 号：V241.5[航空宇航科学与技术—飞行器设计]