Sumitomo Precision Products Co., Ltd.

Kawasaki Jukogyo Kabushiki Kaisha

Sinfonia Technology Co., Ltd.

The Society of Japanese Aerospace Companies

Toshiyuki Kumada

Kenji Hayama

Kazuhide Isotani

Taku Kondo

Masaru Ono

Masayuki Takada

Masaaki Monte

Kazuhiro Masutani

Satoshi Ihara

Hiroshi Saito

A method for attenuating aerodynamic noise from a landing gear may include researching a start point of a shear layer as a flow field characteristic of a region in the vicinity of an original shape of the landing gear, and adding a plate-shaped object in the vicinity of the start point, changing the start point to an edge portion of the plate-shaped object to make the shear layer farther from the original shape. Another method for attenuating aerodynamic noise from a landing gear may include researching a static pressure and an airflow velocity in a region in the vicinity of the landing gear as a flow field characteristic of the region, and adding a plate-shaped object covering a surface of the landing gear which is different from a surface facing an upstream side in an airflow direction, increasing the static pressure in the region to reduce the airflow velocity.

Method of attenuating noise in aircraft landing gear and structure

The present invention is to provide an electro hydrostatic actuator excellent in a snubbing characteristic including a cylinder type actuator main body, a pistonhaving a piston rod, the piston slidingly moving in a cylinder of the actuator main body, a motor, a pumpfor supplying fluid according to the rotation of the motor, a mechanism for adjusting a running amount of the fluid into and from the cylinder according to the motion of the piston, and a reservoirfor adjusting the supply of the fluid corresponding to a volume difference generated according to the motion of the piston, and a controllerwhich controls the number of revolutions of the motor according to the calculated load torque, and a snubbing control method used for this. An electro hydrostatic actuator of realizing a snubbing mechanism capable of increasing energy efficiency, when used for a landing gear retraction/extension device of an airplane, can be provided.

Electro-hydrostatic actuator excellent in snubbing characteristic, and drive device used for the same, and control method used for the same

Growing community of inventors

Amagasaki, Japan

Toshiyuki Kumada