Investigation on the temperature compensating model for ring laser gyroscope

Thermal effects impose the greatest limit on the precision of a ring laser gyro (RLG). Selections of temperature sensing points were comparatively discussed based on large numbers of experimental data to improve its precision, and the optimum combination was selected to establish a practical compensating model. The model is applied to new experimental data under the given and varied temperatures. Results show that the bias trend changing with the temperature is basically eliminated and the bias stability is enhanced significantly.     

χ2统计检验的风险分析及改进算法

为了更好地满足航空领域对故障检测漏检风险的特殊要求,研究了检验法的误检和漏检风险问题,通过具体算例和仿真分析得出χ2两类风险与故障幅度之间的关系,并指出单历元χ2检验法在小故障幅度条件下的误检和漏检风险不能很好地满足航空需求.因此,利用统计理论和序贯检验思想,提出了一种基于χ2-CUSUM统计检验的改进算法,能够兼顾数据窗前端和终端的检测可靠性,有效降低χ2检验的漏检风险,最后的联邦滤波仿真曲线和相关数据表明新算法的有效性和可行性.