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2714 results about "Momentum" patented technology

In Newtonian mechanics, linear momentum, translational momentum, or simply momentum (pl. momenta) is the product of the mass and velocity of an object. It is a vector quantity, possessing a magnitude and a direction in three-dimensional space. If m is an object's mass and v is the velocity (also a vector quantity), then the momentum is 𝐩=m𝐯, In SI units, it is measured in kilogram meters per second (kg⋅m/s).

Ophthalmic fluid delivery device and method of operation

InactiveUS20090192443A1Medical devicesSpray nozzlesMomentumBlinking reflex
An ophthalmic fluid atomizer configured to safely deliver an ophthalmic fluid, the ophthalmic fluid atomizer including a body having a proximal end, a distal end and a keyed surface contour, a reservoir connected to the body within a cavity of the body, wherein the reservoir contains an ophthalmic fluid disposed therein, wherein the keyed surface contour permits insertion of the reservoir into the cavity when the reservoir is in a predetermined orientation and prevents insertion into the cavity when the reservoir is not in the predetermined orientation. The atomizer further including a discharge plate disposed at the distal end, wherein the discharge plate includes a plurality of openings extending therethrough and a prime mover that transmits the ophthalmic fluid from the reservoir to the discharge plate, wherein transmission of the ophthalmic fluid across the discharge plate generates a plume of ophthalmic fluid along a direction directly toward the eye, wherein the plume of ophthalmic fluid travels unassisted from the discharge plate to the eye and at the eye has a momentum that has a magnitude that is insufficient to trigger at least one of an ocular blink reflex and a lacrimation reflex of the eye, wherein the plume of ophthalmic fluid contains an amount of ophthalmic medicine and the momentum of the plume is such that substantially all of the amount of ophthalmic medicine is received and retained by the eye. The atomizer further including a nozzle assembly attached to the body and a handle assembly comprising a handle, the handle assembly coupled to the nozzle assembly.
Owner:OPTIMYST SYST

Attitude control system for space vehicle and method thereof

The invention discloses an attitude control system for space vehicle and a method thereof. The control system has only one biased momentum wheel, one set of tri-axial magnetic torquer and one attitude controller loaded with algorithm. The method comprises a step of rate damping controlling, a step of initially capturing controlling and a step of stationarity controlling. At the rate damping stage, geomagnetism change is used to control the magnetic control of three passages of a satellite by B-dot; at the initially capturing stage, the magnetic control is realized, PD control is performed by pitching and the passages are rolled and yawed to carry out nutation and precession composite control; at the stationarity controlling stage, the magnetic control is realized, PD control is performed by pitching and the passages are rolled and yawed to carry out nutation and precession composite control. The capturing stage and the stationarity controlling stage fully depend on magnetic torquer to perform positive magnetic control, thereby changing which a satellite only uses a magnetic torquer to carry out unload of the momentum wheel or auxiliary magnetic control, so as to refine system configuration to further improve reliability of the system. Momentum of a satellite is biased to rotate on the ground, so as to ensure stable separation of the satellite without performing air injection control. Therefore, the magnetic torquer can be used for realizing fast and stable initial rate damping.
Owner:SHANGHAI ENG CENT FOR MICROSATELLITES
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