应用球面三角法和方向余弦矩阵法分别推导出双轴陀螺平台的支架误差公式，发现由这两种方法推导出来的公式计算结果是一致的。
Methods of spherical trigonometry and direction cosine matrix were applied respectively to derive the bracket error, and the two methods had the same error formula and the same calculation results.
常用的计算方法有双压法和压力温度法等，可以采用直接折叠法或初始矩阵法建立气囊的有限元模型。
The common calculation methods include dual pressure method and pressure temperature method in which the air bag FEM model can be created using the direct folding method or initial matrix method.
首次利用整体传递矩阵法对机床主轴双转子耦合系统的动力特性进行了详细研究。
Study on high frequency acoustical performance of a ventilation and sound insulation window using transfer matrix method;
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