空间飞行器分布式通用组合导航仿真平台方案研究

在研制空间飞行器导航系统的过程中,搭建导航仿真平台能够有效地节约成本并缩短研发周期.在模块化、通用化和标准化设计原则的指导下,利用多台计算机和相应的数据总线开发了空间飞行器分布式通用组合导航仿真平台.在空间飞行器导航系统特性分析的基础上,提出了捷联惯性导航系统、GPS、脉冲星导航系统、磁强计和星敏感器组合导航方案,设计了仿真平台的结构,论述了仿真平台的硬件设计、软件开发和算法,并探讨了仿真平台的扩展性能.试验表明该仿真平台能够逼真地模拟空间飞行器导航系统,并为设计者提供有益的建议.

Development of Distributed General Integrated Navigation Simulation Platform for Spacecraft

Navigation system, which supplies high precision navigation information, is a crucial part of a spacecraft. Space flight tests, to demonstrate the performance of a spacecraft navigation system, are usually very expensive and high risk. In order to reduce cost and shorten period of development during designing a spacecraft navigation system, building a navigation simulation platform becomes an efficient method. A distributed general integrated navigation simulation platform was developed using multiple computers and data bus under the design principle of modularization universalization and standardization. Based on the characteristic analysis of a spacecraft navigation system, an integrated navigation scheme combining strap-down inertial navigation system (SINS), global positioning system (GPS), x-ray pulsar navigation system (XPNS), magnetometer and star sensor was proposed. The scheme used the federated Kalman filter algorithm as its information fusion algorithm. The configuration of the distributed simulation platform was designed to realize integrated navigation function including Trajectory Creator Subsystem, Inertial Measurement Unit (IMU) Subsystem, SINS Subsystem, GPS Subsystem, XPNS Subsystem, Magnetometer Subsystem, Star Sensor Subsystem and Integrated Navigation Subsystem. The distributed simulation platform is composed of hardware system and software system. Hardware design, software development and algorithm in Part III were given. In Part IV, the extension of the distributed simulation platform was studied, to a new distributed simulation platform or a hardware-in-loop simulation platform. It is illustrated that the distributed simulation platform is capable of simulation spacecraft navigation system with high fidelity; also it can provide some useful advice for spacecraft navigation system designers.