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Inertial navigation system upgrade
Oct 19, 2018

UAV navigation is to properly direct the drone to the destination within a specified time along the scheduled route, according to the required accuracy. In order for the drone to successfully complete the scheduled navigation mission, in addition to the starting point and the location of the target, the navigation parameters such as the real-time position, navigation speed, and heading of the drone must be known.


The navigation technologies currently used on drones mainly include inertial navigation, satellite navigation, Doppler navigation, terrain-assisted navigation, and geomagnetic navigation. These navigation technologies have their own advantages and disadvantages. Therefore, in UAV navigation, it is important to select the appropriate navigation technology according to the different tasks of the drone.


At present, it is necessary to develop a new inertial navigation system, which can improve the accuracy of the integrated navigation system. The new inertial navigation system has developed a variety of inertial navigation systems such as fiber inertial navigation, laser inertial navigation, and micro-solid inertial instruments. With the rapid development of modern MEMS, the development of silicon microgyroscopes and silicon accelerometers is progressing rapidly, and its low cost, low power consumption, small size and light weight are suitable for tactical applications. With the advancement of advanced precision machining processes and breakthroughs in key theories and technologies, there will be many types of high-precision inertial navigation devices, and the accuracy of combined guidance will also increase.


At the same time, navigation stability can be improved by increasing the combination factor. In the future, UAV navigation will place higher demands on the stability and reliability of integrated navigation. The combined navigation factor will have sufficient redundancy and no longer depend on one or a few technologies in the integrated navigation system. When one or several factors are not working properly due to unexpected situations, it will not affect the normal navigation needs of the drone.


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