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Abstract:
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Nowadays, positioning is becoming more important information source than before. A widely used system for positioning is the Global Positioning System (GPS). A commonly known fact is that while the systems accuracy is within meters in generating coordinates under ideal conditions, it is very unreliable in some circumstances. In these problematic cases, additional information and data processing is needed for accurate positioning. Inertial navigation system (INS) is already used to acquire navigational information in some military and aviation applications. These environments and applications have slightly different sensor requirements than in portable applications. In portable devices, the sensors and components should be low-cost, tiny, and their power consumption should be as low as possible. The recent progress in the development of Micro-Electro-Mechanical Systems using micro-machining technology is enabling the use of INSs in portable applications. Also other kinds of sensors than inertial measuring can be used to collect additional information about the surrounding environment and therefore to aid in positioning. In this thesis, a secondary inertial-based system to assist the GPS in portable applications is studied. During this work, also the hardware implementation of a portable inertial measurement unit wasdesigned. /Kir10 |