1571 results about "Vertical vibration" patented technology

The present invention relates to controlling an actuator for positioning a read/write head in storage devices such as disk drives. More specifically, the invention relates to using a sensor to detect the disk vibration amplitude perpendicular to the disk surface, and using feed forward control to cancel or counteract the tendency of the read/write head to deviate off-track due to disk vibration. Various approaches are proposed to detect the disk vertical vibration.

The invention provides an engine vibration isolation system which is based on a combination suspension and a control method, relating to the automatic control technical field. The invention forms the combination suspension by a plurality of passive rubber elastomers and a single controllable magneto-rheological damper which is obliquely arranged between the middle part of the engine and a base; an acceleration sensor and a force sensor respectively extract the vertical and transverse vibration acceleration of the engine body and the vertical vibration force of the base, so as to calculate the vibration excitation frequency and the transverse vibration speed of the engine; an engine vertical vibration isolation fuzzy control rule and a transverse damping state control rule are established in a controller, and an oblique control force of the magneto-rheological damper is calculated; the driving current of the magneto-rheological damper is determined by an oblique control force, the damping force of the combination suspension is adjusted in real-time, the transmission of the vibration energy of the engine is restricted. The invention can lead to effective vibration isolation of the engine in wide-frequency range, reduces the self vibration of the engine, and improves the durability and the riding comfort of a carrier.

A disk device includes a disk unit housing a disk-shaped storage medium, a case holding the disk unit, a bracket holding the case, and a guide member guiding sliding movement of the case in and out from the bracket. The disk device also includes spring members on one of the bracket and the case, distributed in the direction of the relative movement. Each of the spring members extends longitudinally in the direction of the movement. Distal ends of the spring members face and press against the other of the bracket and the case. Base portions of the spring members are integral with the one of the bracket and the case. The spring members inhibit lateral vibration of the case by pressing against small projections on the case. Other spring members inhibit vertical vibration of the case by pressing against sliding support rails of the case. A face plate of the case absorbs vibration in the longitudinal direction.

Disclosed is an internal weight type vertical vibrator including: a housing; a magnetic circuit unit placed in the internal space of the housing, and comprising a magnet perpendicularly placed and a yoke for fixedly receiving the magnet therein for generating a magnetic field; spring members provided with upper ends fixed to the housing and lower ends fixed to the magnetic circuit unit for vertically; a vibrating unit placed in the yoke so that the outer surface of the vibrating unit is surrounded by the yoke, comprising the weight having a hollow cylindrical structure provided with a central hole, into which the magnet is inserted; and a vibration-generating coil placed just below the magnetic circuit unit so that the vibration-generating coil is interlinked with the magnetic field of the magnet for allowing current supplied from the outside to flow in one direction therethrough.

The invention discloses a three-dimensional isolation support. The three-dimensional isolation support comprises a lower connecting plate (1), a horizontal isolation support body (3), an intermediate connecting plate (2), a disc spring vertical isolation device and an upper connecting plate (4) which are arranged from bottom to top in sequence. Vertical isolation is achieved through a viscous fluid damper, a disc spring set, multiple connecting plates, a guiding rod, a limiting bolt, an annular spring and other auxiliary devices, and the connecting plates, the guiding rod, the limiting bolt and the annular spring guarantee the normal conducting of vertical isolation. A traditional isolation support is improved due to the adoption of vertical isolation, vertical vibration and small vertical earthquakes can be resisted, and the structure has certain vertical vibration (earthquake) isolating ability.

An anti shock device has a base plate and a top plate, at least one pair of support racks are mounted between the top plate and the base plate. At least one adapter is mounted between the support racks. The adapter has a curved rail defined therein, and the support racks also have curved rails defined therein which curves opposite to that of the adapter. A rolling shaft is mounted through the curved rails. In addition, a damping layer is provided on the top plate or base plate as well as support racks and rolling shafts. When the anti shock device is subjected to the earthquake, a relative displacement will reduce the horizontal vibrations and the damping layer will reduce the vertical vibrations.

Shock absorbers of left and right front wheel suspensions and shock absorbers of left and right rear wheel suspensions each are constituted by a damping force adjustable hydraulic shock absorber provided with a frequency response unit. An actuator of a damping force variable mechanism provided to the shock absorber is driven and controlled by a controller. The controller variably adjusts the damping force between the soft side and the hard side by the damping force variable mechanism according to a vertical vibration when a vehicle body vertically vibrates at a low frequency. The controller does not adjust the damping force when the vehicle body vibrates at a higher frequency than the low frequency.

The invention discloses a road identification system and method based on vehicle vertical vibration system identification. The road identification system based on the vehicle vertical vibration system identification is mainly composed of a sensor signal acquisition module, a sensor signal processing module, a system identification module, a self-adaptive state observation module, a road space process generating module, a road characteristic parameter extraction module and a road classifier. The sensor signal processing module, the system identification module, the self-adaptive state observation module, the road space process generating module, the road characteristic parameter extraction module and the road classifier are integrated in an ECU (electronic control unit) chip and communicated with one another through a bus, and the sensor signal acquisition module is subjected to data transmission with the ECU chip through a wire harness. The road identification system and method based on the vehicle vertical vibration system identification aims at providing a method and a measuring system which are capable of estimating road types conveniently, rapidly and relatively accurately to solve the defect that an existing road identification technology cannot adapt to the changes of vehicle system parameters.

The invention relates to a vertical vibration isolation system of single freedom and ultra-low frequency, comprising a mass block, a middle mass block, a zero point generator, a zero stiffness apparatus and a stiffness base. The zero stiffness apparatus invents the dynamic stiffness values of the system at a low cost, which greatly decreases the natural frequency of the system and realizes the passive vibration isolation within the range of ultra-low frequency. The zero point generator reduces the vibration transmissibility in the range of the ultra-low frequency and improves the efficiency of vibration isolation; otherwise, the parameters of the zero point generator can be changed to regulate the system vibration transmissibility according to the actual amplitude and frequency requirements of the vibration isolation. The existing relationship between the zero point generator and the zero stiffness apparatus is: the zero stiffness apparatus decreases the dynamic stiffness value and also brings down the zero value of the zero point generator III and realizes zero within the range of ultra-low frequency.

The invention discloses a self-adaptive damping variable ultra-precise vibration absorber, which has the following structure: the exterior of a metal shell is in an upper end-opened cylinder shape; the metal shell is hollow, is divided into an upper hollow part and a lower hollow part by a clapboard, has an H-shaped section; a lower cavity is formed in the hollow part on the lower part; an upper cavity is formed by connecting the upper hollow part and a piston mechanism through a film structure in a sealed mode; an air inlet is formed at the bottom of the lower cavity; a communicating pipeline with a throttling valve is arranged between the lower cavity and the upper cavity; a load connecting plate is fixedly connected with the upper end face of the piston mechanism; an absolute velocity sensor is arranged on the load connecting plate; a non-contact eddy current proximity sensor is arranged on the upper end part of the metal shell; an active actuator is arranged between the metal shell and the load connecting plate; and the load connecting plate is used to be fixedly connected with load. The self-adaptive damping variable ultra-precise vibration absorber can well attenuate vertical vibration and perform on-line self-adaptation without off-line debugging, and can provide hyperstatic environment for a photoetching machine and other precision equipment.

A vibratory exercise apparatus capable of providing a sufficient vertical movement force is provided, which adopts a structure that a bobbin coil connected with a vibration plate is employed in a magnetic gap of a magnetic circuit using a permanent magnet which can generate a strong magnetic force. The vibratory exercise apparatus includes a magnetic gap type vertical vibrator which generates vertical vibration by a permanent magnet and a bobbin coil, a bobbin guide which is installed at the center of a yoke, a bobbin guide rod which is reciprocally movably coupled with the bobbin guide and whose one end is coupled with the upper portion of a bobbin, a joint whose one end is coupled with the upper portion of the bobbin, a vibration plate which is coupled with the other end of the joint, a guide which guides vertical movement of the vibration plate, and a spring which limits a range of movement of the vibration plate and absorbs impact when the vibration plate descends.

The invention discloses a three-degree-of-freedom series-parallel type robot for traditional Chinese medicine manipulation and massage. The three-degree-of-freedom series-parallel type robot for the traditional Chinese medicine manipulation and massage comprises a movable base plate, a lifting device, an in-parallel support and a massage enforcement division. The lifting device is used to adjust heights of the in-parallel support and the massage enforcement division, the in-parallel support is a 4 HRU type in-parallel mechanism of two degrees of freedom with one translation and one rotation, and the massage enforcement division can choose a profile modeling massage finger and a column type massage head to realize manipulation and massage movements by a man hand or an elbow portion and enforces the manipulation and massage movements such as vertical vibration massage, transverse tumbling, rotary massage and any combination based on the three basic massage modes to human body parts. The three-degree-of-freedom series-parallel type robot for the traditional Chinese medicine manipulation and massage can overcome the defects of the prior art and has three degrees of freedom with one translation and two rotations; the profile modeling massage finger can be adjusted with high flexibility and bio-fidelity and strong in adaptation towards the human body manipulation and massage parts; the three-degree-of-freedom series-parallel type robot for the traditional Chinese medicine manipulation and massage also has the advantages of being good in decoupling property of mechanism movements, steady and reliable in work, compact in structure, convenient to operate and maintain, high in safety and the like.

An anti-shock device has at least two sliding members placed in at least two layers. Each sliding member is comprised of a slotted seat, an inner seat, and a rolling shaft. The slotted seat has a slot defined longitudinally in a face and has outer curved rails defined in two sidewalls. The inner seat mounted slidably in the slot has an inner curved rail defined therein, corresponding to and curving in the opposite direction of the outer curved rails. The rolling shaft is mounted rotatably through the outer curved rails and the inner curved rail. When subjected to vibration, the anti-shock device converts the horizontal forces into vertical forces. In addition, an energy dissipation member is provided in the anti-shock device that eliminates vertical vibrations.

The invention provides a multi-stage high-efficiency shock-absorbing base for a box-type substation, which includes an upper support plate, a lower support plate and a concrete facade, and a horizontal shock-absorbing device and a longitudinal shock-absorbing device are fixedly installed on the sides of the lower support plate. The bottom of the lower support plate is fixedly connected with rollers, and the rollers are slidably connected with the chute, and the chute is fixedly connected with the oil pressure shock absorber, and the oil pressure shock absorber is fixedly connected with the concrete facade through anchor bolts. The present invention The structure is simple, the box-type substation can be supported by the oil pressure shock absorber, and the vertical vibration of the box-type substation due to external force can be absorbed and buffered, and the box-type substation can be absorbed and buffered Due to the lateral and longitudinal vibrations generated by external forces, the loss of internal equipment in the box-type substation is reduced, and the safety factor of the box-type substation is improved.

Systems and methods for monitoring vehicle sensors to determine and report road quality using a communication device are disclosed. The communication device determines the vehicle's location on a road, such as by use of a GPS-enabled head unit or similar device and appropriate mapping software. Monitoring road quality may be achieved by adding a sensor to the shocks, by use of a vertical displacement sensor present on the head unit, and the like. Various combinations of sensors may be employed. A horizontal displacement sensor may be used. The signals from the sensors are monitored by the head unit and analyzed to judge the quality of the road by the amount of vertical vibration that is encountered. This data, together with the vehicle's location, may be transmitted through a mobile network to a central server for distribution in road quality reports and to improve driving directions in mapping software.

The invention discloses a testing method and an apparatus for a supporting state, a dynamic balancing state and a non-centering state of a rotating machine. The testing apparatus comprises a machine 1, a machine 2, and a shaft coupling. The testing apparatus is characterized in that: the machine 1 is connected with the machine 2 through the shaft coupling; a horizontal vibration sensor X1 and a vertical vibration sensor Y1 are installed on a casing and an engine base of the machine 1, wherein the casing and the engine base are at the side close to the shaft coupling; a horizontal vibration sensor X2 and a vertical vibration sensor Y2 are installed on a casing and an engine base of the machine 2, wherein the casing and the engine base are at the side close to the shaft coupling; a speed detection sensor N and a supporting stiffness and non-centering dynamic tester 3 are installed on the machine 1 and the machine 2. According to the traditional static detection method, there is a bind area in which a supporting stiffness state and a centering state can not be identified on the dynamic condition of the machine, so that debugging can not be guided comprehensively and correctly; however, according to the testing method and the apparatus, the above-mentioned problem can be solved.

The invention discloses a mechanical equipment clamping conversion type vibration attenuation method. The vibration attenuation method includes the step that a vertical vibration attenuation mechanism is arranged below mechanical equipment to achieve vertical vibration attenuation on the mechanical equipment; and the vibration attenuation method is characterized by further comprising the step that the downward deforming motion transmission of the vertical vibration attenuation mechanism is converted into clamping of the two sides of the mechanical equipment on the mechanical equipment in the horizontal direction, the vibration amplitude of the mechanical equipment in the horizontal direction is limited, and the vibration amplitude of the mechanical equipment in the vertical direction is reduced. The mechanical equipment clamping conversion type vibration attenuation method has the beneficial effects that vibration attenuation of the mechanical equipment can be better achieved, and the vertical vibration amplitude and the horizontal vibration amplitude which are generated by the mechanical equipment are reduced.

The invention belongs to the technical field of suspension of cabs, and relates to a design method for an optimal damping ratio of a suspension system of a cab. No design method for the optimal damping ratio of the suspension system of the cab exists domestically or overseas nowadays. The design method for the optimal damping ratio of the suspension system of the cab is characterized in that an iterated integral of the matrix laboratory (Matlab) is used for building an objection function of vertical vibration acceleration of the cab and wheel dynamic loads according to cab vibration acceleration and a wheel dynamic load response function of a wheel, a vehicle body and a cab three mass vibration system, the optimal damping ratio, based on comfort, of the suspension system of the cab, and the optimal damping ratio, based on safety, of the suspension system of the cab are respectively calculated, and then the optimal damping ratio of the suspension system of the cab is designed. Through the design method for the optimal damping ratio of the suspension system of the cab, for different vehicle parameters, cab parameters, vehicle types, driving road conditions and the speed of vehicles, an accurate and reliable optimal damping ratio of the suspension system of the cab can be obtained, the best shock absorbing effect of the cab can be realized, repeated verification and modification are avoided, the development cycle is shortened, and design and experimental expenses are reduced.

The invention discloses a piezoelectric-SMA composite variable friction intelligent damper, belonging to the field of civil engineering structure vibration damping control. The piezoelectric-SMA composite variable friction intelligent damper comprises an upper cover plate and a lower connecting fixed plate, wherein a driver horizontal locating plate fixedly connected with the upper part structure of a vibration isolating layer is positioned between the upper cover plate and the lower connecting fixed plate; the driver horizontal locating plate is provided with a plurality of SMA wire adjusting valves along the vertical direction; a plurality of SMA wires are arranged between the upper cover plate and the lower connecting fixed plate; the two ends of each SMA wire are respectively fixed on the upper cover plate and the lower connecting fixed plate; the SMA wires pass through the corresponding SMA wire adjusting valves; and a laminated piezoelectric driver is also arranged between the upper cover plate and the lower connecting fixed plate. The piezoelectric-SMA composite variable friction intelligent damper has simple structure, convenient assembly and disassembly as well as good repair capacity after vibration; the intelligent damper has self-resetting capability, higher passive damping under the condition of power failure, low initial rigidity and good vibration isolation effect; and the SMA wires can provide vertical uplift bearing capacity and supply vertical damping when in vertical vibration.

The invention provides a four-vibration table two-direction joint vibration device. The device comprises a tested piece, a horizontal vibration table, a vertical vibration table, a test clamp which can be loaded bi-directionally, a mechanical decoupling device and a suspension device thereof, a vibration table switching adjustment device and a vibration table support seat. By using the device, horizontal vibration excitation and vertical vibration excitation can be applied to the tested piece at the same time; moreover, the movement in the two directions can be decoupled well by the mechanical decoupling device and the suspension device thereof so that the eccentric moment of the vibration table is avoided; simultaneously, the problem of freely adjusting the positions of the vibration tables in the two directions is also solved by the vibration table switching adjustment device; and therefore, the aim of performing a four-vibration table two-direction joint vibration test is fulfilled.