The time-division multiplexing (TDM) interferometric fiber optic gyroscopes (IFOGs) technology has a great significance in space applications with the pressing need for limited size, weight, and power consumption (SWP), where the parameters affecting the performance of IFOGs will inevitably face constraints. As the most important index to evaluate the noise characteristic, angular random walk (ARW) is the critical object of concern in the design of TDM IFOGs. This paper presents an ARW model based on the signal-to-noise ratio of TDM IFOG. With the model, the effects of source power, fiber length, modulation phases, and fiber loss on the ARW are analyzed and simulated. The cross-impact of multiple parameters on the ARW is also investigated. Based on the ARW model and parameters analysis, an efficient multiple-parameter optimization method is proposed to obtain the optimal design parameters, with a lower cost of SWP. Finally, the results of parameter optimization are presented in some practical cases.

时分复用 (TDM) 干涉光纤陀螺 (IFOG) 技术在空间应用中具有重要意义，空间应用对有限的尺寸、重量和功耗 (SWP) 有迫切的需求，其中影响 IFOG 性能的参数将不可避免地面临约束。作为评价噪声特性的最重要指标，角随机游走（ARW）是TDM IFOG设计中的关键关注对象。本文提出了一种基于 TDM IFOG 信噪比的 ARW 模型。利用该模型，分析和模拟了源功率、光纤长度、调制相位和光纤损耗对 ARW 的影响。还研究了多个参数对 ARW 的交叉影响。基于ARW模型和参数分析，提出了一种有效的多参数优化方法，以较低的SWP成本获得最优设计参数。最后，在一些实际案例中给出了参数优化的结果。