168 results about "Mass system" patented technology

This invention teaches a multi-sensor quality inference system for additive manufacturing. This invention still further teaches a quality system that is capable of discerning and addressing three quality issues: i) process anomalies, or extreme unpredictable events uncorrelated to process inputs; ii) process variations, or difference between desired process parameters and actual operating conditions; and iii) material structure and properties, or the quality of the resultant material created by the Additive Manufacturing process. This invention further teaches experimental observations of the Additive Manufacturing process made only in a Lagrangian frame of reference. This invention even further teaches the use of the gathered sensor data to evaluate and control additive manufacturing operations in real time.

An air quality system comprising at least one air cleaner unit in communication with an interior air space. In one embodiment, an air quality system for an aircraft comprises a first set of air cleaner units in communication with a lower plenum of the aircraft recirculation system and a second set of air cleaner units in communication with an upper plenum of the aircraft recirculation system. Each air cleaner unit comprises at least one adsorbent unit in combination with at least one photocatalytic oxidation unit. In one embodiment, an air cleaner unit comprises a relatively weak adsorbent material upstream from a photocatalytic oxidation unit, and a relatively strong adsorbent material downstream from the photocatalytic oxidation unit. Methods for removing a pollutant from an air stream and for making an air cleaner unit are also disclosed.

A gyroscope is disclosed. The gyroscope comprises a substrate; and a guided mass system. The guided mass system comprises proof-mass and guiding arm. The proof-mass and the guiding arm are disposed in a plane parallel to the substrate. The proof-mass is coupled to the guiding arm. The guiding arm is also coupled to the substrate through a spring. The guiding arm allows motion of the proof-mass to a first direction in the plane. The guiding arm and the proof-mass rotate about a first sense axis. The first sense axis is in the plane and parallel to the first direction. The gyroscope includes an actuator for vibrating the proof-mass in the first direction. The gyroscope also includes a transducer for sensing motion of the proof-mass-normal to the plane in response to angular velocity about a first input axis that is in the plane and orthogonal to the first direction.

In a gas turbine having a plurality of moving blades provided on a rotary shaft in a circumferentially adjoining condition, a seal pin is provided in a spacing between the shanks of the adjacent moving blades for preventing leakage of cooling air from a blade root portion side to an airfoil side; an arcuately depressed portion is formed on the shank of each of the moving blades; and vibration of each of the moving blades is suppressed in such a manner that the seal pin serves as a spring system while the airfoil portion, the platform, the shank, and the blade root portion serve as a mass system.

An anti-plugging oscillating shear valve system for generating pressure fluctuations in a flowing drilling fluid comprising a stationary stator and an oscillating rotor, both with axial flow passages. The rotor oscillates in close proximity to the stator, at least partially blocking the flow through the stator and generating oscillating pressure pulses. The rotor passes through two zero speed positions during each cycle, facilitating rapid changes in signal phase, frequency, and / or amplitude facilitating enhanced data encoding. The rotor is driven by a electric motor disposed in a lubricant filled housing. In one embodiment, the housing to shaft seal is a flexible bellows. In one embodiment, a torsional spring is attached to the motor and the resulting spring mass system is designed to be near resonance at the desired pulse frequency. The torsion spring may be a solid torsion bar or a magnetic spring.

A semi-active control methodology is provided for a spring / mass system, for example a real-time adjustable shock absorber system. The methodology includes defining a plurality of operating zones based on system parameters and user-definable or preset inputs. The methodology also includes processing to account for non-inertial spring / mass system response and multidimensional forces acting on the system, and an acceleration hedge calculation to accurately define system operation at extrema of travel. The methodology is generally directed at producing a plurality of valve control signals, selecting among the valve control signals, and applying the selected control signal to the valve in a closed-loop feedback system to adjust the energy in the spring / mass system.

The invention discloses an efficient wideband vibrating energy collector with an elastic amplifying mechanism and belongs to the technical field of new energy and power generation. The vibrating energy collector comprises a shell, the elastic amplifying mechanism, a cantilever beam piezoelectric vibrator and a spring-mass system, wherein the shell is formed in such a way that 4 lightweight metal plates are fixed between an upper end cover and a lower end cover through bolts to form a tetrahedron; U-shaped connecting seats for fixing the cantilever beam piezoelectric vibrator are arranged on the lightweight metal plates; the elastic amplifying mechanism comprises a spring element and a damping element; the elastic amplifying mechanism is fixed between a base and the shell through a bolt; the cantilever beam piezoelectric vibrator comprises an upper piezoelectric ceramic chip, a lower piezoelectric ceramic chip, a metal substrate and a magnet; the upper piezoelectric ceramic chip is bonded at the top of the metal substrate and the lower piezoelectric ceramic chip is bonded at the bottom of the metal substrate; one end of the metal substrate is fixed on the U-shaped connecting seat through a bolt; the magnet is mounted at the other end of the metal substrate; the spring-mass system comprises a tension spring, a pressure spring and mass block; one end of the tension spring is connected with the bottom surface of the upper end cover; one end of the pressure spring is connected with the top surface of the lower end cover; the other ends of the tension spring and the pressure spring are respectively connected with the mass block; the magnet is embedded on the periphery of the mass block; and reverse magnetic poles of the magnet at the end part of the piezoelectric vibrator and the magnet embedded on the periphery of the mass block are oppositely mounted. The efficient wideband vibrating energy collector with the elastic amplifying mechanism, disclosed by the invention, has the advantages that the amplitude of weak vibrating displacement of the base can be amplified, the power generating energy and conversion efficiency of the piezoelectric vibrator are increased and efficient wideband energy collection and conversion can be achieved.

A balance-positioning system of work-piece table on photo-etching machine is prepared as setting long stroke module on balance mass unit to drive exposure table to move along X and Y directions, arranging balance mass unit on base frame to balance reverse-acting force and reverse-acting torque, setting balance mass drift-proof unit between base frame and master balance mass to compensate drift of balance mass unit along X and Y as well as Rz directions, using control system to control position compensation of long stroke module and master balance mass according to feedback data of measurement unit.

A resonator micro-electronic inertial sensor, preferably a micro-electromechanical system (MEMS) sensor (e.g. a gyro), for detecting linear accelerations and rotation rates in more than one axis comprises: a proof-mass system (21.1, 21.4) flexibly suspended above a substrate for performing a rotational in-plane vibration about a central axis (24,) a drive electrode system (D1, . . . D4) for driving the proof-mass system (21.1, . . . 21.4) to perform said rotational in-plane vibration, and a sensing electrode system (S1, S8) connected to the proof-mass system (21.1, . . . 21.4) for detecting linear accelerations or rotation rates in more than one axis. Said proof-mass system (21.1 21.4) has more than two proof-mass elements flexibly coupled (25.1a, 25.1b) to each other. Each proof-mass element (21.1, 21.2) is directly and flexibly connected (23.1, 25.1a, 25.1b) to an anchor structure (22) on the substrate (32). The proof-mass elements (21.1, . . . 21.4) are preferably arranged In a ring-shaped configuration between an inner and an outer radius (R1, R2) with respect to the central axis (24).

The invention provides a sound absorbing structure and a vehicle part with the same. The sound absorbing structure is constituted of a housing having a hollow portion and an opening and a vibration member composed of a board or diaphragm. The vibration member is a square-shaped material having elasticity composed of a synthetic resin and is bonded to the opening of the housing, thus forming an air layer closed inside the sound absorbing structure by the housing and the vibration member. In the sound absorbing structure, when the lateral / longitudinal dimensions of the air layer and characteristics of the vibration member (e.g. a Young's modulus, thickness, and Poisson's ratio) are set such that the fundamental frequency of a vibration occurring in a bending system falls within 5% and 65% of the resonance frequency of a spring-mass system, a vibration mode having a large amplitude occurs in a frequency band lower than the resonance frequency of the spring-mass system, this improving the sound absorption coefficient.

A method for producing a silicon torsion spring capable, for example, of reading the rotation rate in a microstructured torsion spring / mass system. The system that is produced achieves a low torsional stiffness compared to a relatively high transverse stiffness in the lateral and vertical directions. The method proceeds from a wafer or wafer composite and, upon suitable mask coverage, a spring with a V-shaped cross section is formed by anisotropic wet-chemical etching which preferably extends over the entire wafer thickness and is laterally delimited only by [111] planes. Two of the wafers or wafer composites prepared in this way are rotated through 180° and joined to one another oriented mirrorsymmetrically with respect to one another, so that overall the desired X-shaped cross section is formed.

The invention relates to a printed circuit board arrangement, more particularly a multilayer printed circuit board. The printed circuit board arrangement comprises at least two printed circuit boards which are arranged parallel to one another and connected to one another. According to the invention, in the case of the printed circuit board arrangement of the type mentioned initially, at least one surface region of one printed circuit board is connected to another printed circuit board of the printed circuit board arrangement by means of an element embodied in an elastic and / or damping fashion in such a way that an oscillatory system, more particularly a spring-mass system, an oscillatory bending strip or a flexurally oscillatory board is formed by means of the surface region of the printed circuit board and the element.

The invention provides a vibration enhanced device of electric vibration table, comprising a substrate and a test bed; the device is characterized in that: a spring is connected between the substrate and the test bed; a rigid guide bar leading the test bed surface to do vertical movement is installed between the substrate and the test bed; an additional mass block is placed at the center of the test bed; selection of the rigidity of the spring and the resonance frequency of the spring quality system satisfy the following relationship: omega n2=k(M+m) / Mm. Compared with the prior art, the technical proposal is easier to be implemented, and can effectively limit the transverse vibration and conveniently control the vibration enhanced frequency. The vibration enhanced ability can arrive more than 10 times. The technical proposal and the method can be used in various dynamic test apparatuses for enhancing the vibration acceleration or displacement and providing special dynamic excitation source.

A system for management of an enterprise, including a quality system module provided for storing quality parameters derived from at least one quality system certification standard, and an interface operable by a user for retrieving data based on at least one of the quality parameters in response to a request from the user. Another system includes an operating procedure module storing detailed procedures for carrying out at least one task, and an interface operable by a user for retrieving data related to the detailed procedures.

A method and system for calculating a control function for a structural system (10) that can be used to determine an appropriate control force to apply to an active member (18) within a stationary member (12) on the structural system (10). An active member (18) and a stationary member (12) are defined as a two-mass system in which the active member (18) and the stationary member (12) move in opposite directions. The stationary member (12) is mounted to an isolation subsystem (14) that is composed of six isolators (28) at multiple degrees of freedom. The isolation subsystem (14) is softer than the stationary member (12), active member (18) and a spacecraft surface (16) due to a damping element (32) of the isolation subsystem (16). The isolation subsystem (16) is mounted to the spacecraft (16) and decouples the spacecraft (16) from the stationary member (12) and thus the active member (18). An accurate control force for the active member (18) can be determined based upon the above structure (10).

A photoetching machine workpiece stage magnetic preloading balance positioning system belongs to the field of semiconductor photoetching technology; the system mainly comprises a base stage, a balance mass system, a magnetic preloading system, a motion unit, a silicon wafer stage, and a balance mass drift-resistant system; the balance mass system comprises two frames which nest each other, and has freedom degrees in the X and Y directions; the motion unit is disposed at the upper part; the impact force caused by the motion part to the base stage is weakened by momentum conservation principle;the balance mass drift-resistant system is used to compensate the position displacement of the balance mass system caused by external resistance during working; the magnetic preloading system is usedfor real-time compensation of the torsion of the workpiece stage along a Z axis; the invention can effectively reduce internal vibration, compensate the torsion of the workpiece stage along the Z axis, and thus greatly improve the motion positioning precision of the silicon wafer stage.

The invention discloses a linear compressor with a damping structure, which comprises a closed container, a movable active cell part, a following active cell, an upper spring set, a middle spring set and a lower middle spring set, wherein the following active cell is a mass element or lower piston, a connecting device is connected with a fixed frame through the upper spring set and is connected with the following active cell through the middle spring set, and the following active cell is connected with the bottom surface of the closed container or a lower cylinder through the lower spring set. The linear compressor has the advantages that a spring-mass system consisting of the following active cell and the spring sets is added in a active cell system so as to form a two-degree-of-freedom vibration system, the vibration of the compressor is reduced by using the vibration characteristics of the system, and the application frequency range is wide; and when the excitation frequency is slightly changed, the effect of reducing the vibration can be achieved. A motor, the cylinder and the like of the compressor are fixed inside the closed container, main weights are concentrated on the closed container, and thus the closed container is lower in sensitivity of the vibration so as to be good in stability.

The invention discloses a split conductor anti-galloping device. The split conductor anti-galloping device comprises a support, and a lead wire clamp is uniformly arranged towards outside on the support. The split conductor anti-galloping device is characterized in that a circular cylinder is also arranged on the support; a spring and an additional weight ball are arranged in the circular cylinder; one end of the spring is connected with the additional weight ball, and the other end of the spring is connected with the circular cylinder; the lead wire clamp is rotatablely connected with the support through a rotating shaft; the circular cylinder is in closed connection with the support; and antifreeze solution is filled into the circular cylinder. In the split conductor anti-galloping device, the energy dissipation is performed by adopting a spring quality system so as to retard galloping, and after being iced, each sub-lead of a split conductor can be adjusted automatically by adopting the lead wire clamp which is arranged rotatablely, so that each sub-lead is iced uniformly so as to remove the galloping, and the energy dissipation effect is enhanced further by adopting the mutual effect of the antifreeze solution and the spring quality system; and therefore, compared with other anti-galloping devices, the split conductor anti-galloping device has the advantages of excellent effects of galloping prevention and galloping elimination.

An airframe includes an energy absorbing structure with a frame, a beam mounted to the frame at a rotational joint and a collapsible member. In response to reaching a predetermined threshold load value during a high sink rate impact event, the collapsible member will collapse under an aft section of the upper deck. The rotational joint operates as a virtual hinge such that a forward section of the upper deck deforms in a predictable manner. As the upper deck supports the high mass systems, the high mass components are less likely to separate from their mounting and penetrate into the crew compartment and the main rotor system will tilt aft away from the crew compartment to minimize the likelihood that the rotor blades may penetrate the crew compartment.

A Coriolis gyroscope comprises a mass system that can be excited to perform vibrations parallel to a first axis, whereby a deflection of the mass system due to a Coriolis force along a second axis perpendicular to the first axis is detectable. At least one first correction unit and at least one second correction unit, which each comprise a plurality of stationary correction electrodes and moving correction electrodes whereby the stationary correction electrodes extend in the direction of the first axis and are firmly connected to the substrate by corresponding anchor structures, and the moving correction electrodes are provided as a part of the mass system. A method for reducing the quadrature bias of a Coriolis gyroscope of this type comprises applying at least temporarily constant corrective voltages to the correction units.

The invention discloses a two-mass system resonance suppression method. Two-mass system resonance is suppressed by adopting a method of increasing a motor shaft end equivalent viscous damping force. The method comprises the steps of firstly multiplying a difference value between the motor rotating speed and the load end rotating speed by an equivalent damping compensation coefficient so as to generate a motor shaft end equivalent viscous damping force; then dividing the equivalent damping force by a torque constant so as to be converted into equivalent damping compensation current, and applying the equivalent damping compensation current to subtraction of current instructions. Meanwhile, the equivalent viscous damping force, which needs to be added to the motor shaft end, is enabled to be associated with the resonant amplitude of the system, thereby establishing a corresponding adaption law, automatically adjusting the equivalent damping compensation coefficient, and achieving an effect of adaptive resonance suppression. The two-mass system resonance suppression method is easy for engineering implementation, parameters are easy to adjust, and a purpose of adaptive resonance suppression can be achieved.

The invention provides a balance mass moving device based on a five-rod mechanism and a method for controlling the same, wherein, the functions of accompany movement compensation and independent movement reset of a double-layer balance mass system of a workpiece table are realized by controlling four torque motors in the double-layer balance mass system of the workpiece table; the double-crank five-rod movement actuating unit is improved by adoption of the dual structure design method, and complete decoupling of the mechanism movement is realized; a corresponding actuator system, a corresponding measuring system and systematic master control are worked out according to the dual structure design method; and the movement control precision in the balance mass horizontal direction is improved through an optimized decoupling algorithm so as to guarantee that the Rz-oriented precision reaches the microradian precision.

A landing gear vibration absorber (1) of a helicopter (2) with a landing gear (3) comprising a pair of skids (4, 5) and at least one cross tube (6, 7) for mounting the skids (4, 5) to a helicopter's fuselage (8). At least one spring-mass system (10, 20, 24) is mounted to the landing gear (3). Said at least one spring-mass system (10, 20, 24) is tuned to the helicopter's main excitation frequency and said at least one spring-mass system (10, 20, 24) being located at or near at least one antinode of the landing gear (3). The invention is related as well to a method of operating a landing gear vibration absorber (1) of a helicopter (2).

The invention discloses a workbench with a balancing mass system, which comprises a base, a micropositioner, a macro platform and the balancing mass system, wherein the macro platform comprises two Y-direction long-stoke motors and two Y-direction long-stroke sliding blocks driven by the two Y-direction long-stroke motors; the balancing mass system comprises lower-layer balance weights and four upper-layer balance weights which are connected in an air flotation way; the lower-layer balance weights are in vertical air floatation connection with the base, and are provided with two Y-direction air flotation guide rails and two Y-direction guide rails; two Y-direction long-stroke sliding blocks are arranged on the two Y-direction guide rails in a sliding way; the end parts of the four upper-layer balance weights are connected end to end by a plurality of flexible hinges to form a mouth shape, are arranged on the two Y-direction air flotation guide rails and are provided with two Y-direction motor stator guide rails; and rotors of the two Y-direction long-stroke motors are arranged on the two Y-direction motor stator guide rails in the sliding way. The workbench provided by the invention can eliminate or reduce negative influence on the micropositioner in an Rz direction.

The invention relates to a fireproof coating primer of a single-mass-system indoor thin steel structure. The fireproof coating primer comprises the following components in parts by mass: 9-12 parts of adhesive powder, 0.1-0.5 part of powder dispersant, 0.1-0.3 part of powder antifoam agent, 20-24 parts of inorganic insulating filler, 0.0-20.06 parts of coating reinforcing material and 24-28 parts of mixture composed of dehydration catalyst, foaming agent and charcoal forming agent. The fireproof coating is produced by one-step dry powder mixing method, therefore, the production efficiency is improved; the problems that the fireproof coating primer of the emulsion-based double-mass-system thin steel structure is easy to mildew in summer and has unstable foaming performance; and meanwhile, the product cost of package, storage, transport and the like is saved.

The method involves transmitting vibrations acting on an object to be protected to a cubic vibrating mass (1) that is inertially held between springs (2, 2') e.g. tension springs or pressure springs. Static dead weight of the vibrating mass is partially absorbed by magnetic forces that act between elements of a horizontally acting vibration damper, where the vibrating mass is completely made of steel. The vibrating mass is formed as a disk shaped body. Viscoelastic dampers are connected with the vibrating mass, so that one of the dampers is attached to the springs. An independent claim is also included for a horizontally acting vibration damper formed as a spring mass system.

The invention provides a mass system deployment device which comprises a distribution module and a reception module. The distribution module comprises an image resolution unit and a data distribution unit. The reception module comprises a data reception unit and an image recombination unit, wherein the data reception unit is adapted to transmit data packets on the network by means of network multi-point transmission. The invention also provides a mass system deployment method, which comprises: randomly selecting a node as distribution node and preparing a service system image on the node; resolving the service system image to data packets on the distribution node and transmitting the data packets to a reception node by mean of network multi-point transmission; storing the data packets, received by the reception node, in a local disk, and recombining to obtain a service system image. The invention allows the time consumption of deployment to be related to the service system image size and the network bandwidth, rather than node quantity, so that the time consumption of deployment is reduced and the efficiency of deployment is improved.