双摆是一种扭力摆，可用于实验测量测试对象的质量惯性矩。典型的应用是测量飞机，特别是小型无人机（UAV）的质量惯性矩。该模型对应于以下文章中讨论的模型：

Jardin，M.，Mueller，E.，“Optimized Measurements of Unmanned Air Vehicle Mass Moment of Inertia with a Bifilar Pendulum”，Journal of Aircraft，Vol。46，No. 3，May-June 2009，pp。763-775。

本文还在2007年的AIAA GNC会议上提出：

Jardin，M.，Mueller，E.，“Optimized Measurements of UAV Mass Moment of Inertia with a Bifilar Pendulum”，AIAA-2007-6822，AIAA GNC Conference，Hilton Head ，SC，2007年8月20 - 23日。-The bifilar pendulum is a torsional pendulum that can be used to experimentally measure the mass moment of inertia of a test object. A typical application is to measure mass moment of inertia of aircraft, especially small unmanned air vehicles (UAV). This model corresponds to the one discussed in the following article:

Jardin, M., Mueller, E.,　Optimized Measurements of Unmanned Air Vehicle Mass Moment of Inertia with a Bifilar Pendulum,　Journal of Aircraft, Vol. 46, No. 3, May-June 2009, pp. 763-775.

This paper was also presented at the AIAA GNC Conference in 2007:

Jardin, M., Mueller, E.,　Optimized Measurements of UAV Mass Moment of Inertia with a Bifilar Pendulum,　AIAA-2007-6822, AIAA GNC Conference, Hilton Head, SC, Aug. 20-23, 2007.