The application of north finder in UAVS mainly uses new inertial devices and strapdown inertial navigation technology to provide accurate speed, position, attitude and other information for UAVS, so as to achieve accurate navigation and positioning. At present, the application of UAVs is the most mature in the military field, and with the deepening of people's cognition of UAVs, it has shown a rapid development trend in civilian fields such as remote sensing mapping, border and coastal defense, forest fire prevention, pipeline patrol, emergency disaster relief, and police law enforcement. It can be said that drones will become an integral part of smart city environmental life.
Drones have recently come into the public eye. Because the structure of the four-rotor UAV is simple and reliable, it has the functions of vertical takeoff and landing, fixed point hovering, and flying in small space, so it has been widely paid attention to and has been widely used in many fields.
The navigation system is one of the main components in the key technologies of the four-rotor UAV system, which undertakes the mission of providing the aircraft's position, speed, posture and other parameters. Because a single navigation system is difficult to meet the application requirements of UAVs, the combined navigation system that combines two or more different navigation systems in an appropriate way has better functions than using any navigation system alone.
1.Composition of UAV system
The composition of UAV system is shown in Figure 1.1, including flight control system, navigation system, inertial measurement system, positioning system, remote control system, etc. Reliable and safe navigation system provides basic guarantee for the realization of UAV self-flight and task execution, and is a key prerequisite for the development of automated UAV system.
The motion state of the UAV can be measured using acceleration sensors and gyroscopes, but as the flight duration increases, the UAV system will produce cumulative bias, resulting in an inaccurate description of the device's flight state information.
The effective combination of UAV and north finder can not only help UAV shorten the time of north finding, but also improve the accuracy of north finding. The three-axis MEMS gyroscope and accelerometer as the core components of north seeker make the system resistant to external interference and can be used normally in harsh environments. Enabling drones to fly in a safer, more reliable and more autonomous manner.
2.The advantages of a north finder on drone
(1)The product built-in gyroscope and accelerometer as the core components, compared with the traditional mechanical gyroscope, has the advantages of simple structure, no rotating parts, light weight, impact resistance, long service life, low power consumption, large dynamic engineering and so on.
(2) After the initial power-on alignment, it can be continuously output without drift, and there is no need to initialize the alignment in the middle.
(3) It does not require an external reference in the north-finding process. In addition to the limitation of high latitude, the north finding survey is not affected by weather, day and night time, geomagnetic field and site visibility conditions.
(4) MEMS north finder can not only carry out full temperature compensation, but also operate normally in harsh environments. When the UAV encounters extreme bad weather during flight, the north finder can also maintain its normal operating mode.
Summary
The North finder developed by Ericco: the cost-effective three-axis MEMS North finder ER-MNS-05 and smallest size MEMS North finder ER-MNS-06 currently have mature inertial technology. If you are interested, you can read about it. They have inertial/satellite integrated navigation, positioning and orientation functions. It has the characteristics of small size, light weight and high cost performance, and can measure the direction, position, angular velocity, acceleration and other information of the carrier, which is very suitable for the use of unmanned aerial system.
The correct operation direction is the basic guarantee of UAV operation, and the robust north finding equipment provided by Ericco is the cornerstone to ensure the safe operation of UAV.
More Technical Questions
1.Technical analysis of MEMS direction alignment instrument for mining
2.Research on downhole north seeker
3.Research on orthogonal monitoring technology of north finder
4.Modeling and filtering in signals collected by FOG north seekers
5.Error Modeling and Compensation Analysis of North Finder Based on FFT
6.Research and use of north finder for mining drilling rigs
Products in Article
