介绍压力容器上实体元素的测量，测量坐标系的建立与转换，以设计基准评定制造精度。
Introducing method of measuring the points on the pressure vessel, establishing and transforming coordinate systems, estimating accuracy of manufacture with design standard.
该文以同步旋转坐标系模型为基础，设计了三相电压型PWM整流器的级联式非线性PI控制器。
This paper proposes a cascaded nonlinear PI controller for three-phase voltage source PWM rectifier, which is based on its model in synchronous reference frame.
本文首先介绍了SINS的导航原理，推导了SINS在地理坐标系下的导航算法，并进行了相应的程序设计和仿真。
This paper introduces the navigation principle of the SINS firstly, the navigation algorithm on geographical coordinates is deduced, and then the simulation program is developed.
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