摘要:
A cross elastomer mount comprising a body composed of an elastomer and having a plurality of legs, a first platform for supporting a first member and a second platform for supporting a second member, a plurality of rigid platform arms pivotally attached to the platforms, and a plurality of hinges pivotally attaching the rigid platform arms to the legs of the cross elastomer mount whereby the plurality of legs bow or arc under a shock and vibration force to allow the cross elastomer mount to attenuated the forces while providing a tension and shearing resistance to the shocks and vibrations.
摘要:
In precision equipment such as a semiconductor exposure apparatus, an inertial load is driven by using an actuator, and an actuator fixed to a structure such as a vibration isolation base, an apparatus mounted on the base, and a control force is applied to the structure by using a drive reaction force generated upon driving of the inertial load, thereby stably and quickly suppressing produced vibrations.
摘要:
A multi-sensor, multi-actuator control system for controlling vibration in a mechanical structure. The system employs feedforward and feedback control strategies in tandem. Outputs from adaptive feedforward and modal feedback control loops are added to each other. The control system may be dynamically adapted to the changing physical characteristics of the controlled structure. For example, the plant transfer function estimates for the feedforward unit and the gain for the feedback unit may be calculated as functions of sensed physical parameters (location, mass, etc.), and the plant transfer function estimates may be dynamically modified to reflect time-varying feedback control gains. If desired, the control system may be used to cancel low frequency vibrations (
摘要:
An improved efficiency impact absorption device comprises a honeycomb (20) with a number of ribs (11) defining respective outlets (12), with preferably hexagonal section, terminating in holes (13), in the lower part of the honeycomb (20). The honeycomb (20) is injection-moulded in plastic, said plastic being chosen from plastic resin derived from polycarbonate or rubber-filled polypropylene.
摘要:
A resilient member and method of forming the same wherein the resilient member isolates the transmission of vibrations and/or sound. The resilient member (20) includes a first element (24), preferably including a contour (26), a second element (28) manufactured from a deformable material (e.g., a thermoplastic), and a resilient element (32) (e.g., rubber). The second element (28) is deformed during a molding process to conform its shape or size to the surface (25) of the first element (24). In a preferred embodiment, the second element (28) is plastically deformed to conform to a contour (26) of the first element (24) thereby forming a mechanical interlock. Rotational and translational interlocks and the method for forming same are described.
摘要:
An article transporting/storing apparatus is provided for efficiently transporting or storing articles that are different in size, form or number. First and second coupling members crossing each other are disposed between each pair of adjacent posts such that a spacing therebetween can be freely changed. An article carrier is removably attached to the insides of the four posts for carrying articles on the article carrier.
摘要:
An electronic device includes a housing that is formed with two fixed positioning members, and a back-supporting plate that is movable forcibly on an upright housing portion of the housing to move two tongues of two movable members along two annular guide slots in the positioning members. Each of the annular guide slots has a plurality of positioning slot portions. Each of the tongues of the movable members is limited to move within a corresponding one of the annular guide slots along a single direction, and is biased into a selected one of the positioning slot portions of the corresponding one of the annular guide slots. As such, the inclination angle of an upright housing portion of the housing relative to a horizontal support surface can be adjusted.
摘要:
An adjustable mounting mechanism for rigidly mounting devices such as instruments, transducers and so forth, rotating such mounted devices at various angles in the azimuth direction and/or tilting such mounted device at various pitch angles, roll angles and combined pitch-roll angles to permit pan, pitch, roll and combined pitch-roll motion respectively of the device for measurement, simulation and examination of its dynamic performance in multiplicity of ways.
摘要:
This invention relates to a quake-absorbing device and installation method therefor. A conventional quake-absorbing device has been known as described, for example, in Japanese Patent Application Public Disclosure No. 2000-14472(A). This conventional quake-absorbing device comprises an upper base secured on an object to be protected from an earthquake or other vibrations, a lower base on a floor, upper and lower upcurved rails attached to the upper and lower bases, and rollers which moves rotatively along the upper and lower rails by rolling. The upper and lower rails are vertically opposed to each other across the rollers at the angle of approximately 90 degrees so as to be arranged in the plane form of a substantially square. However, in a case where computer-associated equipment such as a computer server is protected from seismic waves, wiring such as communication and electric circuits is often laid on a floor and connected to the equipment. The wire or cable possibly comes into contact with the quake-absorbing device, consequently to degrade the quake-absorbing performance of the quake-absorbing device. Thus, it has been very difficult to apply the quake-absorbing device to the equipment having the wiring connected thereto. To remedy the disadvantage suffered from the conventional quake-absorbing device, the present invention provides a quake-absorbing device having improved quake-absorbing performance and a method capable of installing the quake-absorbing device without suspending the operation of existing protected object. The quake-absorbing device of the invention is distinctively provided with an opening passage for permitting the wiring cables connected to the protected object to pass therethrough so as not to bring the wiring cables into contact with the quake-absorbing device, thereby to achieve high quake-absorbing performance.
摘要:
A method for controlling vibrations includes receiving the vibrations from a vibration-generating substructure at at least two vibration diverters and diverting the vibrations away from each of the vibration diverters, using the respective vibration diverters, to a vibration confiner that interconnects the vibration diverters. The vibration diverters can include passive elements, e.g., plates, ribs, notched plates, plates having wells, etc., active elements, e.g., actuators, sensor/actuators, etc., or a combination of passive and active elements. The vibration confiner can include a passive layer damping material for dissipating vibrations.