仪器科学与光电工程学院“国际引智课程”—“

主讲人：George T. Schmidt

乔治·施密特先生于1965年获得麻省理工学院本科及硕士学位，于1971年获得麻省理工学院“仪器科学”博士学位。自1996年起至今一直担任美国航空航天学会（AIAA）下属《导航制导与控制期刊》主编。目前，施密特先生任北约电子系统技术组主任、导航制导与控制方向高级顾问、俄罗斯导航与运动控制研究院选任委员、AIAA院士、IEEE终身院士。同时，他还是IEEE航空与电子系统领域知名报告人，麻省理工学院航空航天领域资深讲师，美国空军科学咨询局资深顾问。2007年以前，先后担任Draper实验室教学部总监、导航制导方向负责人、Draper制导技术中心主任等职务。主要研究方向涵盖导航制导与控制、飞行器及航天器导航技术、Kalman滤波技术应用、高分辨率合成孔径雷达组合技术、卫星导航及惯性传感器技术等。发表学术论文及专著80余项。曾获得2001年AIAA国际合作奖、北约技术研究组织最高奖、2005年冯·卡曼奖章等诸多荣誉。

课程一： Satellite Navigation Systems for Aerospace Applications: The Prospects and Problems

时间：2012年11月15日，星期四，19:30开始

地点：沙河校区实验楼4号楼205报告厅

摘要：Position, velocity, and timing (PVT) signals from the Global Positioning System (GPS) are used throughout the world but the availability of these signals in all environments has become a subject of concern. This is a particularly difficult problem that requires new and innovative ideas to fill the PVT gap when the data are degraded or unavailable. One solution is to use inertial sensors to bridge the gap in navigation information. This presentation gives a roadmap for the development of the GPS, inertial sensors, and integrated inertial navigation system (INS)/GPS technology. This roadmap will lead to better than 1-m accuracy, low-cost, robust, moving platform navigation in the near future. Such accuracy will enable military and civilian applications which were previously unthought-of a few years ago. After a historical perspective, accuracy and other planned improvements for GPS are explained. Then a vision of the inertial sensor instrument field and inertial systems for the future is given. The trend in integration technology from loosely-coupled INS/GPS to tightly-coupled INS/GPS to deeply-integrated INS/GPS is described, and the synergistic benefits are explored. Some examples of the effects of GPS interference and jamming are illustrated. Expected technology improvements to system robustness are also described. Applications that will be made possible by this new technology include personal navigation systems, robotic navigation, and autonomous systems with unprecedented low-cost and accuracy.

课程二：GPS/INS Integration Architectures and Performance Comparisons

时间：2012年11月16日，星期五，16：00-18：00

地点：如心二层大报告厅

摘要：The availability of Global Positioning System (GPS) signals in difficult environments has become a subject of great concern. One solution is to also use an inertial navigation system (INS) which will always provide continuous navigation information. An INS exhibits relatively low noise from second to second, but position errors increase with time. In contrast, GPS position errors are relatively noisy from second to second, but exhibit no long-term growth. Using both of these systems together is superior to using either alone. Integrating the information from both sensors results in a navigation system that operates almost like a error-free INS. Additional benefits can also be gained depending on how the information is combined. This presentation will focus on integration architectures including loosely-coupled, tightly-coupled, and deeply-integrated configurations. The advantages and disadvantages of each level of integration will be identified. Examples of current and future systems will be cited. Simulation comparisons between the three architectures will be explained in order to understand the advantages of each. The loosely-coupled and tightly-coupled systems will be compared in several scenarios including aircraft flying against jammers and a helicopter flying a scout mission with Doppler velocity measurements. Results from a simulation of an INS/GPS system using a synthetic aperture radar (SAR) will be presented. The tightly- coupled and deeply-integrated architectures will be compared for precision guided munitions used in several different jamming scenarios.