Billion aviation egrets respond to UAV Xian garbled performance: directed interference

category:Internet
 Billion aviation egrets respond to UAV Xian garbled performance: directed interference


On May 1st, red May Xian City Wall International Culture Festival debut scene, 1374 UAVs flying over the Yongning gate. Shen Jizhong Video screenshots show that some UAV patterns appear garbled phenomenon. On the evening of May 1st, on the scene of the red May Xian City Wall International Cultural Festival, the chaos code of the left UAVs on the left unmanned aerial vehicle (UAV) of the thousand unmanned aerial vehicles (UAV) of the spring dance big Xian was observed on the scene of the first show of the Xian City Wall International Cultural Festival. In response to the above situation, the egret issued a statement yesterday that the positioning and auxiliary positioning system of some unmanned aerial vehicles (UAV) was subjected to directional interference after takeoff, causing its location and height of data anomalies. The positioning and auxiliary positioning system is disturbed In May 6th, Guangdong egret Media Technology Co., Ltd. announced in its official micro-blog announcement that after the performance, the company immediately summoned industry experts to analyze the data of 496 affected UAVs. Backstage data showed that the performance of the UAV equipment, communication system and flight system was normal in May 1st. The positioning and auxiliary positioning system of human machine is subjected to directional interference after take-off, resulting in abnormal data of its position and height. The city wall in Xian has a 10 million 500 thousand performance fee From the data of the Chinese government procurement network, the spring dance big Xian wall of a thousand unmanned aerial vehicles (UAV) Unmanned Aerial Vehicle (UAV) Unmanned Aerial Vehicle (UAV) event is purchased by the Xian city wall management committee, and the Guangdong billion air white egret Media Technology Co., Ltd. finally deals with 10 million 500 thousand of the performance fee. Nandu reporters have learned that billions of egrets have performed many UAVs formation in China. Li Zhiyuan, director general of the media technology director of the egret, told the Nandu reporter, in 2016, the Jingdong 618, the first time to make the UAV commercial performance marketing, it was successful, and later as an export service. In 2017, at the Fortune Global Forum in Guangzhou, 1180 UAVs of the billion airways egrets also performed a wonderful UAV show over the Pearl River. On the Xian Wall International Cultural Festival unmanned aerial vehicle formation performance, the official micro-blog of the UAV UAV, a total of 1374 unmanned aerial vehicles, the number of UAV formation in the South Gate City and the East and west area, in the night sky to form a span of about 1.2 kilometers, depth 100 meters, height 260 meters of splendid scroll, and innovative The effect of dynamic sky screen was adopted. For the sake of safety, the entire performance space is limited to the vertical wall of the city wall, and the width of the performance space is not more than 12 meters. The simulation of hundreds of millions of conditions before the performance Billion aviation egrets emphasized that hundreds of millions of simulations were carried out through the system before the official performance. We simulated hundreds of millions of conditions through the system in the simulation stage, carried out tens of thousands of test flight tests in the overall actual debugging stage, and the engineers arrived in Xian 10 days ahead of time to fly, debug, optimize and rehearse, in order to adapt to the various complex environmental factors in the local area. Nevertheless, according to the live video of May 1st, the situation of random code appeared on the left UAV formation. According to media reports, some netizens broke the news that during the end of the performance of the UAV recovery process, there are still many UAVs falling down vertically. In May 2nd, the staff of the Xian wall management committee said in response to the media that there did be a performance error, but there was not a lot of falling unmanned aerial vehicles. At present, the relevant companies are investigating whether the performance errors are caused by human operation or signal interference, and will be reported to the public after the investigation is clear. ialogue Expert: UAV will not fall directly because of interference. The UAV will hover and wait for recovery after the UAV is disturbed Nandu: from a technical point of view, what may happen to the UAVs on the performance scene? Sun Yi: from a technical point of view, it is a bit like the phenomenon of losing stars in UAVs, which means that GPS signals can not be received. The GPS band is open and, of course, suppressed. The wavelength of the GPS signal is difficult to penetrate the wall, so it is necessary to look through, if you want to interfere with the GPS of a few UAVs, the eye of the interferer must first see the UAVs. So if someone stands on the west side of the south gate, in the alley, we can do half of the UAV interference, of course, this is only hypothetical. But in general, UAVs have some protective measures. After losing GPS, UAVs can maintain their posture in a certain period of time. That is to say, even if GPS loses a star, the UAV can be stabilized and will not shake. But only when posture information has no location information, UAVs may drift with the wind. So the UAV on the left looks like a lost star. Nandu: some netizens broke the news that in the process of recovering the UAV at the end of the performance, there were still many UAVs falling down vertically. From a technical point of view, what is the reason for this situation? Sun Yi: each plane has a continuation time, the unmanned aerial vehicle can not receive GPS signals for a long time, and the performance Fang Yexu will increase the time to wait, and the time is long because the reason for the protection of electricity may be land and land on its own landing. From a technical point of view, UAVs will not fall directly because the signal is jammed. When the UAV is disturbed, the UAV will hang in the wind and wait for the signal to recover, but if it exceeds the limit time, the UAV will land on a continuous land, and the speed of the landing is still hidden. Civil UAV GPS is not good to do anti-interference measures Nandu: its not very difficult to interfere? Nandu: is there any anti interference measure for civilian UAV GPS? How is the anti-interference capability? Sun Yi: Civil UAV GPS is not good to do anti-interference measures, because it is not a large UAV, it can set a variety of navigation systems, such as GPS, Beidou, GLONASS, etc. on UAV. Most of the military UAVs are installed with three navigation systems. If the GPS signals are not good, other navigation systems can be automatically used, even if a person interferes with 3 navigation systems, and a large inertial navigation device can be used to calculate the track. Civilian UAVs are usually only using GPS for navigation because of their cost and carrying capacity. Nandu: is it possible to install anti-jamming equipment in the flight site? Sun Yi: a scavenger can be installed on the spot. The sweep frequency meter can monitor all the frequency bands within a certain range. However, the frequency sweep can only monitor the interference, and it can not accurately orientate, which requires more advanced instruments. But orienteering is not easy. Some areas, such as alley, can also reflect phenomena. The GPS signal is a common signal and can not be encrypted like phone calls. GPS signal is not point to point, but broadcast, and several signals interact, so it is sometimes difficult to identify the source of interference by monitoring the interference signal. Written by: Nandu correspondent Bu Yuqin from Beijing, the source of this article: Southern Metropolis Daily editor: Wang Fengzhi _NT2541 Sun Yi: Civil UAV GPS is not good to do anti-interference measures, because it is not a large UAV, it can set a variety of navigation systems, such as GPS, Beidou, GLONASS, etc. on UAV. Most of the military UAVs are installed with three navigation systems. If the GPS signals are not good, other navigation systems can be automatically used, even if a person interferes with 3 navigation systems, and a large inertial navigation device can be used to calculate the track. Civilian UAVs are usually only using GPS for navigation because of their cost and carrying capacity. Nandu: is it possible to install anti-jamming equipment in the flight site? Sun Yi: a scavenger can be installed on the spot. The sweep frequency meter can monitor all the frequency bands within a certain range. However, the frequency sweep can only monitor the interference, and it can not accurately orientate, which requires more advanced instruments. But orienteering is not easy. Some areas, such as alley, can also reflect phenomena. The GPS signal is a common signal and can not be encrypted like phone calls. GPS signal is not point to point, but broadcast, and several signals interact, so it is sometimes difficult to identify the source of interference by monitoring the interference signal. Write: Nandu reporter Bu Yuqin from Beijing