Kawasaki Jukogyo Kabushiki Kaisha

Kabushiki Kaisha Kawasaki Zosen

Masaaki Higashi

Kenichi Nakashima

Masanori Hamamatsu

Yasuo Saito

Yukinobu Kohno

Hiroshi Ohnishi

Tatsuhiko Goi

Kazushige Sugimoto

Hiroaki Fujimoto

Makoto Baino

Kenji Yoshimura

Makoto Azuma

Hidekazu Matsuba

Nobuo Hamada

Koji Nishiumi

Susumu Harada

Satoshi Otsuki

Yunosuke Kobayashi

A power generation system includes a continuously variable transmission, a power generator, a transmission driving device, an output-side speed detector, and electric power load device, and a controller. The electric power load calculation device detects current values and current values of respective phases of three-phase alternating current generated by the power generator, calculates electric power load of the power generator based on the detected values, and executes filtering by attenuating a higher harmonic of a set frequency when calculating the electric power load of the power generator. The controller executes feedback control of calculating and outputting a gear change command to the transmission driving device so an output-side rotational speed detected by the output-side speed detector becomes equal to an output-side target rotational speed corresponding to the set frequency. The controller also executes feedforward compensation of correcting the gear change command, based on the calculated electric power load.

Power generation system and method of controlling same

A power-on/off command is output to a breaker for switching when a frequency difference between a plurality of electric power supply sources is within a predetermined range and a phase difference between the plurality of electric power supply sources is within a predetermined range, in switching of electric power supply between the plurality of electric power supply sources. A generator drive rotation speed of a transmission device is feedback controlled so that the frequency difference is maintained at a value within the predetermined range and the phase difference is maintained at a value within the predetermined range when the detected frequency difference is within the predetermined range and the detected phase difference is within the predetermined range. A generator rotation speed command is calculated by adding to the rotation speed command of the transmission device an output value obtained by subjecting the detected phase difference to a proportional-integral-control.

Synchronous power-on/off control method and synchronous power-on/off controller

A construction machine comprises an electric motor/generator coupled to an electricity accumulator, an engine, a transmission coupled to drive wheels, an epicyclic gearing for coupling an output shaft of the electric motor/generator, an output shaft of the engine, and an input shaft of the transmission, the engine torque and/or the generator torque being transmitted to drive wheels, a clutch for directly coupling two among the output shaft of the electric motor/generator, the output shaft of the engine, and the input shaft of the transmission, and a controller configured to, under a condition in which the clutch is in an off-state, control engine speed based on the degree to which the accelerator is open and on the amount of electricity in the electricity accumulator, to control shifting of the transmission gear position based on the accelerator opening degree, operational state of the generator, and the electricity amount.

Construction machine and control method thereof

A movable object maneuver method wherein a destination point is set; wherein a thrust value is calculated in real time which minimizes or maximizes a performance index associated with one or more state variables and thrust required for a movable object to reach the destination point and which takes into account non-linear conditions inherent to the movable object; and wherein the movable object is moved based on the calculated thrust value.

Method and system for maneuvering movable object

Force balance and moment balance associated with thrust of air and water craft equipped with thrust generators are preset in view of non-linear characteristics and dynamic characteristics of thrust generators. A performance index for minimizing thrusts generated by the thrust generators is defined. Using the balance as restricting condition, propeller thrusts of the thrust generators and rudder angles and changing speeds of rudders that minimize the performance index are calculated.

Method and device for allocating thrust

Growing community of inventors

Kobe, Japan

Masaaki Higashi