National Aerospace Laboratory of Science Technology Agency

Tokyo Aircraft Instrument Co., Ltd.

Yoshio Hayashi

Seizo Suzuki

Teruomi Nakaya

Naoaki Kuwano

Asao Hanzawa

Toru Iwata

Mitsuo Usami

Masao Ebihara

Takashi Saitow

A flight velocity detection system using a truncated pyramid-shape multi-e Pitot probe in which an extreme end portion has a truncated pyramid-shape, a cylindrical hole is provided at the apex thereof, a total pressure tube of a smaller diameter than that of the cylindrical hole is secured at a position by a predetermined length determined by a relationship with the diameter of the cylindrical hole from the extreme end of the cylindrical hole, and groups of pressure holes comprised of a plurality of pressure holes are arranged in each of the truncated pyramid surfaces of the truncated pyramid shape. Items of pressure information detected by the probe are input into a velocity vector processor to convert them into electric signals, and signals are processed using pressure coefficients of the holes of the probe with respect to the velocity vector stored in advance in the velocity vector processor to calculate flight velocity vector (V, .alpha., .beta.) with respect to the probe axis from the pressure information and air density.

Truncated pyramid-shape multi-hole pitot probe and flight velocity

A superprecision positioning device includes an output shaft rotor, a plurality of eccentric shaft rotors including an inner eccentric shaft rotor and an outer eccentric shaft rotor, and a bearing base cylinder, electrically rotating and driving mechanism portions being provided between the eccentric shaft rotor and the output shaft rotor, and between the outer eccentric shaft rotor and the bearing base cylinder, respectively, whereby the eccentric shaft rotors and the output shaft rotor may be independently rotated and controlled. With this arrangement, movement in three degrees of freedom may be achieved by translational movement and rotation of the output shaft in a two-dimensional surface, and if an axially movable support shaft is inserted in the output shaft, an article being positioned may be moved with four degrees of freedom in total, providing superprecision positioning in units of 1/10 micron.

Superprecision positioning device

Growing community of inventors

Chofu, Japan

Yoshio Hayashi