说明：  双线摆是一种可用于实验测量试验对象质量惯性矩的扭摆。一个典型的应用是测量飞机，特别是小型无人飞行器（UAV）的质量惯性矩。此模型对应于以下文章中讨论的模型： Jardin，M.，Mueller，E.，“用双线摆优化测量无人机质量惯性矩”，《飞机学报》，第46卷，第3期，2009年5月至6月，第763-775页。 本文件也在2007年AIAA GNC会议上提出： Jardin，M.，Mueller，E.，“用双线摆优化测量无人机质量惯性矩”，AIAA-2007-6822，AIAA GNC会议，希尔顿海德，SC，20
(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.)