Summary / Reader Response Draft #4

The webpage “DJI Matrice 300 RTK commercial drone” from Avetics Global (n.d) advertises the Matrice 300 RTK drone. The drone is packed with many features, consisting of a transmission system, three-propeller emergency landing system and rugged design of its body. The same webpage mentioned that the transmission system on the DJI Matrice 300 RTK commercial drone is the latest OcuSync Enterprise (DJI enterprise, 2020). The transmission system enables transmission up to 15km away and it has real-time auto-switching between frequencies of 2.4GHz and 5.8 GHz (Aventics, n.d). For secure data transmission, the transmission system does AES-256 encryption (Aventics, n.d). Besides the transmission system, the Matrice 300 RTK drone has a three-propeller emergency landing system. The drone features IP45 ingress protection rating and an operating temperature of -20°C to 40 °C. (DJI, n.d). With the latest OcuSync Enterprise transmission system, three-propeller emergency landing system and a rugged body design, the Matrice 300 RTK drone is a reliable and safe drone for missions in unpredictable environments.

One such feature that makes the drone reliable is the OcuSync Enterprise transmission system. By having real-time switching between the 2.4GHz and 5.8GHz frequencies the transmission system can avoid the already crowded 2.4GHz spectrum in urban areas and utilise the underused 5.8GHz band according to Hays et al. (2014). The 5.8GHz band is an improvement over the 2.4Ghz band where it faces less congestion and thus lesser interferences and increased reliability (Dolińska et al., 2017). Over long distances, the 5.8Ghz frequency faces greater loss than the 2.4Ghz frequency (Çabuk et al., 2020). For long distances, the 2.4GHz frequency is stronger than the 5.8GHz frequency, making the 2.4GHz frequency more reliable than the 5.8GHz frequency. OcuSync Enterprise transmission system can use the advantages of both 2.4GHz and 5.8GHz frequencies to ensure reliable and smooth signal transmission. Reliable signal transmission between the remote and the Matrice 300 RTK drone ensures that commands given out will not be lost during mission-critical tasks.

The OcuSync Enterprise's reliable transmission system comes with AES-256 encryption for secure transmissions. It is impossible to crack AES-256 encryption according to Rao et al. (2017). No one will be able to hijack the controls of the drone with the uncrackable encryption of the transmission system. The transmission system allows only the intended operator to operate the drone. An operator can have a peace of mind that while conducting any tasks with the drone, no unintended individual can disrupt the operator’s mission.

The reliable rugged body design of the drone is certified with IP45 ingress protection according to DJI (n.d). The rating certifies that the Matrice 300 RTK drone is being protected against any solid foreign object of 1.0mm and greater and water being splash against the drone from any direction. The IP rating of the Matrice 300 RTK drone suggests that any mission will not be interrupted by light and medium rain (Kinisely, 2020).

A feature that makes the drone safe is the three-propeller emergency landing system. According to DJI Enterprise (2020), other drones with a quadcopter design similar to the Matrice 300 RTK drone are unable to fly with only three motors. If one motor fails, a quadcopter-type drone will crash into the ground immediately. When one of the four propellers fails on the Matrice 300 RTK drone, the drone will automatically enter the Three-Propeller Emergency Landing mode (DJI Enterprise, 2020). The mode will first detect a loss of power in a motor or if a motor is rotating at an unintended speed. Next, the flight control system will take over the drone, and ensure the stability of the drone before putting the drone into emergency survival mode (DJI Enterprise, 2020). The emergency survival mode ensures the drone lands in a suitable location and prevents damage to the Matrice 300 RTK drone and/or people.

An issue with the Matrice 300 RTK drone is the drone has an inverted propeller design according to Steel City Drones (2020). The propellers are located near the landing gear of the drone as the arm and body of the drone are above the propellers. With the propeller being located below the propeller arm and near the landing gear, hand launching and recovery of the Matrice 300 RTK drone is impossible. (Steel City Drones, 2020). In the event that the landing gear fails, the propeller will be the first to touch the ground when landing which will damage the propeller and anything or anyone nearby. (Steel City Drones, 2020) Because of the inverted propeller design, any mission that takes place at areas with poor landing and launching spaces might be unsafe or even impossible.  

In conclusion, a drone’s transmission system, as well as the ruggedness and the safety of a drone are important features to consider to ensure reliability and safety during drone missions. With such features on the Matrice 300 RTK drone such as the OcuSync Enterprise transmission system with AES 256 encryption, three-propeller emergency landing system and rugged design, the Matrice 300 RTK drone is the drone for safety and reliability during missions.

References

Aventics. (n.d). DJI Matrice 300 RTK. https://www.avetics.com/dji-matrice-300-rtk?gclid=CjwKCAjwt7SWBhAnEiwAx8ZLai2nKfOhGEBuHchGSgFFTniFHMl5X3IhC28RUNdwrbFDL4GE0YGyRRoCyOkQAvD_BwE

Çabuk, U. C., Tosun, M., Jacobsen, R.H & Dagdeviren, O. (2020). Path Loss Estimation of Air-to-Air Channels for FANETs over Rugged Terrains, 2020 28th Signal Processing and Communications Applications Conference (SIU), pp. 1-4, doi: 10.1109/SIU49456.2020.9302160.

DJI. (2020, May 7). What you need to know about DJI’s newest industrial platform. https://enterprise-insights.dji.com/blog/matrice-300-top-9-features

DJI. (n.d). Specs. https://www.dji.com/sg/matrice-300/specs

Dolińska, I., Jakubowski, M., and Masiukiewicz, A. (2017). Interference comparison in Wi-Fi 2.4 GHz and 5 GHz bands" 2017 International Conference on Information and Digital Technologies (IDT), pp. 106-112, doi: 10.1109/DT.2017.8024280.

DJI Enterprise. (2020, September 4) Next Level Drone Safety: M300 RTK Three Propeller Emergency Landing. https://enterprise-insights.dji.com/blog/m300-rtk-three-propeller-emergency-landing  

Hays, Z., Richter, G., Berger, S., Baylis, C. & Marks, R.J. (2014). Alleviating airport WiFi congestion: An comparison of 2.4 GHz and 5 GHz WiFi usage and capabilities, Texas Symposium on Wireless and Microwave Circuits and Systems, pp. 1-4, doi: 10.1109/WMCaS.2014.7015885.

Knisely. T. (2020). Just How Weather Resistant is the Matrice 300 RTK? https://enterprise-insights.dji.com/blog/matrice-300-weather-resistance

Rao, S., Mahto, D., & Yadav, D. (2017). The AES-256 Cryptosystem Resists Quantum Attacks. International Journal of Advanced Research in Computer Science, 8(3), 404-408. doi:https://doi.org/10.26483/ijarcs.v8i3.3025

Steel City Drones. (2020, Aug 7). DJI Matrice 300 RTK extensive test and review. https://steelcityflightacademy.com/dji-matrice-300-rtk-extensive-test-and-review/

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