A new algorithm called Motion-Parallax-Method is proposed based on motion parallax for reconstructing a 3D motion image from a motion image. Each pixel of frame image of 3D motion image has a vector composed of four elements of RGB-D. The method is deductive without any learning algorithm. We show many experimental results of reconstruction of 3D images and 3D motion images of scenes from motion images captured by a single camera attached on a moving person, a moving drone, or a moving car. When a moving body with a camera becomes stationary, 3D motion image reconstruction is possible for only parts of the image corresponding moving objects in a scene.

View full abstract

Unmanned Air System Traffic Management （UTM） is considered necessary to scale the use of UAS and Urban Air Mobility （UAM） around the world. Single European Sky ATM Research Joint Undertaking （SESAR） run multiple R&D projects to obtain knowledge for building blocks to enable UTM （they call U-Space and there are some differences of notion between UTM and U-Space）. Based on SESAR's recent publication and the presentation at a workshop in Tokyo in November 2019, I discuss what we can learn from them to enable UTM in Japan.

View full abstract

Drones have been attractive for its consumer usage. A drone communicates to the ground station to operate flight plans and requires high-quality wireless communication. It is mandatory to understand a quality between drones and base stations. A radio quality of drone flight area also should be understood. This paper proposes methods to estimate received radio quality of a drone body and a drone flight area. It also reports evaluation of the proposed method by using real observed radio data in a drone flight area. The evaluation realized the error between the estimation value and the observed value was about 4 dB.

View full abstract

The drones are used for many purposes such as structure inspections, pesticide sprayings, photographies, load carriages and investigations in the world. The drones have a week point that it is difficult to fly them in the strong wind. However, it is an important task to fly in the strong wind for the disaster relieves. We have already developed the non-linear controller using a back-stepping method for the attitude control system of the drone. In this paper, we report the modeling of the drone and that using two gyro actuators and that the experiments of the drone with the gyro actuator show good performances.

View full abstract

Around 20 years ago 3D capturing technology using laser scanner begun to be used for landscape and large scale structures. Since then related new hardware and software including photogrammetry have been continuously developed. Recent drone technology heavily affects and promotes these development and market. This article illustrates these movements and tries to propose new human to machine interface as 4th industry revolution.

View full abstract

A new technique for strengthening of commercial magnesium alloys has been developed. The fabricated round bars with diameters of 20 mmf and 49 mmf possess excellent mechanical properties of tensile and yield strengths of 450 MPa and 400 MPa, and 5％ ductility, which are superior to those of the rare-earth （RE）added magnesium alloys. Because REs are not necessary, low price from 1/5 to 1/3 of those of the RE added ones are expected. Techniques of rod bending and strengthening of irregular-shaped magnesium alloys as plates were also developed, therefore, applications to various structural components should be quite easy.

View full abstract

Urban Air Mobility （UAM） is a brand-new air vehicle that can move autonomously and ubiquitously over the city and is sometimes called as a “Flying Car.” UAM is premised on electric vertical take-off and landing （eVTOL） and has been developed around the world based on drone technology. In addition, from the viewpoint of passenger transport, the performance and safety should be equivalent to conventional transport aircraft, but it is also meaningful to look at approaches to utilizing sky above. In this report, we reviewed the global trends of UAM aircraft development and regulation work and introduced the case studies on UAM design.

View full abstract

A solar plane is an airplane which is driven by electric-based propulsion systems with power supplied continuously by the endless solar energy. By replacing conventional fuel and electric power with solar energy, the solar-powered airplane is possible to be a solution to achieve a long endurance. Recently, industries are making efforts for unmanned aircraft systems （UAS） with capabilities of high altitude and long endurance to develop technologies, for low cost, environmentally friendly and energy efficient. This UAS is capable of wide view, disaster response and communication service. This paper will discuss some fundamental subjects and technical problems for the solar plane.

View full abstract

It seems that the structure of the drone motor and its drive system have already been solved. In this paper,the author will clarify what will change when Halbach array field motors are introduced in such fields, by showing the design method of Halbach array field magnets and the characteristics of coreless coils.

View full abstract

The XY separation crank mechanism is a new linear motion mechanism devised by the authors. It eliminates the conrodʼs swinging and makes the piston displacement sinusoidal, so that no higher-order vibrations occur. The authors succeeded in eliminating 1st order vibration by incorporating this mechanism into the engine as arranging the mechanism and cylinder in a mirror image, and minimizing 2nd order and 3rd order vibrations by the effect of the mechanism itself. In this report, we report the ultra-low vibration characteristics of this new engine, the two-cylinder engine with XY separation crank mechanism arranged in mirror-image, and suggest its applicability to drones.

View full abstract