对并联机床数控系统进行了软件模块划分，重点介绍了程序设计模块、加工及仿真模块、手动测量模块的主要功能。
In this paper, the software module of PMT NC system is divided, and the programming module, processing module, simulation module and hand control module are introduced.
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.
仿真结果表明，该方法能有效地判断出系统的暂态稳定性，在程序设计上也具有较好的可扩展性和灵活性。
The simulation result shows that the method can effectively judge the transient stability of the system, and features better expandability and flexibility in program design.
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