10 accepted papers
Aerial unperching of multirotors has received little attention as opposed to perching that has been investigated to elongate operation time. This study presents a new aerial robot capable of both perching and unperching autonomously on/from a ferromagnetic surface during flight, and a switching cont…
This letter presents a new cargo transportation solution based on physical human-robot interaction utilizing a novel fully-actuated multirotor platform called Palletrone. The platform is designed with a spacious upper flat surface for easy cargo loading, complemented by a rear-mounted handle reminis
Existing multirotor-based cargo transportation does not maintain a constant cargo attitude due to underactuation; however, fragile payloads may require a consistent posture. The conventional method is also cumbersome when loading cargo, and the size of the cargo to be loaded is limited. To overcome
This study presents a new hardware design and control of a minimally actuated 5 control degrees of freedom (CDoF) quadrotor-based tiltrotor. The proposed tiltrotor possesses several characteristics distinct from those found in existing works, including: 1) minimal number of actuators for 5 CDoF, 2)…
This letter deals with the problem of an aerial manipulator pushing a movable structure. Contrary to physical interaction with a static structure, suitable consideration of the interacting force during the motion of the structure is required to stably perform this movable structure interaction. To a
In this letter, we introduce a new quadrotor fail-safe flight solution that can perform the same four controllable degrees-of-freedom flight as a standard multirotor even when a single thruster fails. The new solution employs a novel multirotor platform known as the T <sup xmlns:mml="http://www.w3.o
In this paper, we introduce a cargo transportation method with a new type of multi-rotor UAV platform known as T3-multirotor, to achieve stable and constant flight performance regardless of the type of cargo attached to the fuselage. The T3-multirotor, which consists of the `Thrust Generating Part'…
This paper presents a new design of multirotor, named as `Tilting Thruster Type' (T <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sup> )-multirotor. The new platform is equipped with mechanically separated thrusters, which can take any fuselage pos
This paper presents a new design of multirotor, named as `Tilting Thruster Type' (T3)-multirotor. The new platform is equipped with mechanically separated thrusters, which can take any fuselage posture within a specified range regardless of any direction of translational acceleration. A specially de…
This paper presents a practical swing-angle estimation method for slung load operations of the multi-rotor unmanned aerial vehicle (UAV), which is essential to maintain the safety during the operation. In order not to rely on extra sensors for monitoring the swing angle, the proposed method in this…