Mitsubishi Electric Corporation

Mitsubishi Electric Cornoration

Naoki Imamura

Ryo Sakaguchi

Satoshi Kawamura

Takuya Ishioka

Toru Ikegame

Daisuke Suzuki

Shoji Yoshikawa

Koichiro Kamei

Masahiro Iezawa

Kenro Mitsuda

Kazuhiro Odahara

Kazuhiko Fukushima

Sachiko Kawasaki

Naohito Kaneda

Kazushi Sekine

Tomokuni Kato

Yoshitaka Onishi

Kazuhide Kodeki

Mitsuhiro Yamazumi

Norihiko Mouri

Yuya Nishimori

Taihei Kawasaka

Kana Tsuneishi

Ryo Awaya

Daiki Higashiyama

Vessel azimuth control apparatus and azimuth control method

A driving mechanism controller included in a capturing device causes one or more driving mechanisms to spread a tethering member having an elongated shape to the outside of a housing by a target spread length. The driving mechanism controller, when an artificial space object is located in the area surrounded by the tethering member, causes the one or more driving mechanisms to retract the tethering member to the inside of the housing until at least a part of the tethering member comes into contact with the artificial space object. The tethering member is stable in a first shape having a curved section orthogonal to a linear extending direction of the tethering member.

Capturing device and spacecraft

The objective is to obtain an azimuth control apparatus and an azimuth control method that require no excessive memory capacity and calculation time for information processing and can cope with a disturbance by adaptively adjusting a control gain while calculating changing vessel parameters online. The vessel azimuth control apparatus has an azimuth control unit that outputs a steering-angle command signal for making a vessel turn to an azimuth to which the vessel should travel, based on an azimuth command signal generated by an azimuth command generation unit, a yaw-angle signal, and a yaw-angular-velocity signal, a steering-angle control unit that controls a rudder based on the steering-angle command signal, and a control gain adjustment unit that calculates respective frequency responses of the yaw-angle signal and the yaw-angular-velocity signal to a steering-angle signal outputted by a steering-angle detection unit and then adjusts a control gain of the azimuth control unit.

A motor control device includes: a first duty ratio computation unit to compute a first duty ratio to be used for control of a motor body portion on the basis of a target rotational position of a rotor and a rotational position of the rotor; a second duty ratio computation unit to compute a second duty ratio corresponding to an upper limit of the absolute value of the first duty ratio on the basis of a linear function including a variable corresponding to the number of rotations of the rotor; and a control signal output unit to output a control signal corresponding to the first duty ratio when the absolute value of the first duty ratio is smaller than the absolute value of the second duty ratio, and to output a control signal corresponding to the second duty ratio when it is not.

Motor control device, brushless DC motor, actuator, and EGR valve device

In a conventional vessel anti-rolling apparatus, because a large memory capacity and a high-speed high-function computing processing unit are required, the cost of the vessel anti-rolling apparatus is caused to rise. A vessel anti-rolling control apparatus and an anti-rolling control method according to the present disclosure includes

Vessel anti-rolling control apparatus and anti-rolling control method

A sensor () detects the angle of the output shaft () of a synchronous motor (). A multiple rotation processing unit () converts the angle of one rotation or more that is detected by the sensor () into a multiple rotation angle. A phase difference FB unit () performs feedback control in such a way that the phase difference between the electrical angle and the mechanical angle of the synchronous motor () is a target phase difference (). A position FB unit () performs feedback control in such a way that the multiple rotation angle after conversion by the multiple rotation processing unit () is a target position ().

Control device and control method for actuator

A vessel-azimuth control apparatus is configured in such a way that an azimuth controller generates and outputs an angular velocity command, based on an azimuth command from an azimuth command generator and an actual azimuth, in such a way that an angular velocity controller generates and outputs a steering angle command, based on the angular velocity command, a vessel speed, and an actual angular velocity, and in such a way that a vibration suppression controller outputs a final steering angle command, based on the steering angle command.

Vessel-azimuth control apparatus and azimuth controlling method

A lunar orbiting satellite system executes orbit planning of assigning a function (positioning, communication, and flashing) to an artificial satellite (AS) depending on a relative position of the AS to the moon at a time when the moon and the AS are observed from an input point on the earth, and correcting the relative position, which changes in accordance with the moon revolution period. The system includes: a satellite orbit planner which assigns a function to each ASs forming an AS group flying around the moon depending on a relative position of each ASs to the moon at a time when the moon and ASs are observed from an input point on the earth, and set a target orbit according to the function; and a satellite controller which causes the each ASs to execute control based on the function to implement switching of the function.

Lunar orbiting satellite system, and ground station of lunar orbiting satellite system

An object is to obtain a heading control device and a heading control method for ship in which a heading control system is configured on the basis of ship motion information, without promoting oscillation excited by disturbance factors to the ship, such as tidal current or wind. The heading control device for ship, which causes a ship provided with an outboard motor to sail at a desired heading, includes: a heading generator which outputs a heading command; and a controller which outputs a rudder angle command on the basis of the heading command from the heading generator, sensor group information from a sensor group, and ship motion characteristic information from a ship motion characteristic information storage unit.

Heading control device and heading control method for ship

There is provided an engine starting device, including: a motor generator coupled to a crankshaft of an engine; and a starter including a pinion provided in a detachable manner from a ring gear provided on the crankshaft, and configured to mesh with the ring gear when the engine is started, wherein the engine is cranked through simultaneous cranking by both of the motor generator and the starter when a condition set in advance is satisfied, and wherein, in the simultaneous cranking, the starter starts rotating after the motor generator starts rotating.

Engine starting device

To provide a motion control device for a ship, which does not require adjustment of weights of an performance function, and is less liable to fail in control calculation by building optimization calculation only into a part of classical feedback control, the motion control device, which is configured to cause a ship, on which a plurality of outboard engines are installed, to cruise along a desired trajectory, includes: a trajectory generator configured to output a trajectory command; a controller configured to output a control force command based on the trajectory command and a sensor information group output from a sensor group provided for the ship; and a control force distributor configured to carry out, based on the control force command, optimization calculation for operation amounts required for the plurality of outboard engines in accordance with a constraint condition set in advance so as to output the operation amounts.

Motion control device and motion control method for ship

In opening/closing control for the valve mechanism to which the return torque is applied in an opening direction or a closing direction of the valve, provided are a position control system for outputting a q-axis current command based on a position deviation between a target position command directed to the brushless DC motor and the coarse present position of the motor obtained by using the position detection sensor of a pulse output type, and a current control system in which a virtual current feedback is built for outputting a phase voltage command without a current sensor based on the q-axis current command and the coarse present position of the motor obtained by using the position detection sensor of the pulse output type.

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Tokyo, Japan

Naoki Imamura