55results about How to "Improve resonance performance" patented technology

A vibrating inertial rate sensor has sense elements that operate on axes that are rotationally skewed from a node reference axis, enabling both a rate sense and a drive sense determination. Alternatively, the skew may be applied to rotationally offset the drive elements from antinode reference axes to affect active torquing of the gyroscope. The skewed sensing scheme may be applied to vibratory systems having one or more node axes. The skewed drive scheme may be applied to vibratory systems having two or more node axes to affect active torquing.

A head gimbal assembly includes a slider, a rotatable micro-actuator and a suspension to load the slider and the rotatable micro-actuator. The rotatable micro-actuator horizontally rotates the slider with a central portion of the slider as an axis, which includes a bottom plate to be connected with the suspension, two arm plates symmetrically disposed on the bottom plate with a central portion of the bottom plate as symmetry point and at least one piezoelectric pieces to be connected with the arm plates. Selectively, the amount of the arm plates can be four and four piezoelectric pieces to be connected with the four arm plates, respectively.

A vibrating inertial rate sensor has operational elements that define axes that are rotationally offset or “skewed” from a node or anti-node reference axis. The skew may be relative to separate node or anti-node reference axes, or take the form of an element that is “split” about the same node axis. Both the drive signal and the sense signal may be resolved from a common set of sensing elements. The drive elements may also operate on a skewed axis angle to rotationally offset the vibration pattern to affect active torquing of the gyroscope. Skewed drive elements may be combined with skewed or split elements on the same device. The skewed sensing scheme may be applied to vibratory systems having one or more node axes. The skewed drive scheme may be applied to vibratory systems having two or more node axes to affect active torquing.

A test assembly for a disk drive suspension head gimbal assembly includes a steel mount plate and a mount sub-plate of a material such as silicon carbide having a modulus of elasticity to density ratio that is significantly higher than the ratio for stainless steel. Preferably the mount plate and the mount sub-plate taken together have a first resonant shear frequency of greater than 50 KHz, which is generally greater than the frequency range of interest for testing head gimbal assemblies. The high modulus of elasticity to density ratio helps to ensure that any shear mode resonances of the test assembly occur at frequencies that are higher than the frequencies of interesting for head gimbal assembly shear resonance testing purposes.

Provided is a dielectric waveguide filter with a defected ground loaded on a magnetic coupling structure. A row of metallized through holes is punched in each of two sides of a dielectric substrate, electromagnetic waves are limited to be spread in an area between the upper and lower metal surfaces of the dielectric substrate and the two rows of metallized through holes, and a dielectric waveguide transmission line is formed; two pairs of left-right symmetrical metallized through holes are formed in the formed dielectric waveguide transmission line and are perpendicular to the horizontal center line, the dielectric waveguide transmission line is divided into three parts which form dielectric waveguide resonant cavities, and the two pairs of left-right symmetrical metallized through holes form the magnetic coupling structure; double L-shaped transition structures are loaded from an input/output microstrip line to the upper layer metal surface of the dielectric waveguide transmission line to form transition from the microstrip line to the dielectric waveguide, and meanwhile a defected ground structure is loaded on the lower layer metal surface of the dielectric waveguide resonant cavities adjacent to the double L-shaped transition structures. The dielectric waveguide filter has the advantages of low insertion loss and high out-of-band rejection, and can be applied to fields such as the radio frequency front end, image rejection and spurious suppression.

A micro-actuator for a head gimbal assembly includes a metal frame including a bottom support integrated with a suspension flexure of the head gimbal assembly, a top support adapted to support a slider of the head gimbal assembly, and a pair of side arms that interconnect the top support and the bottom support. The top support includes a rotatable plate, connection arms that couple the rotatable plate to respective side arms, and an electrical pad support plate that supports bonding pads. A PZT element is mounted to each of the side arms. Each PZT element is excitable to cause selective movement of the side arms.

A baseplate, for use with a bass drum, including a center plate and a pair of wings extending outwardly therefrom. Each wing cradles and is adjustably secured to a lug affixed to a drum shell of a bass drum. A connection plate unitarily constructed with and extending from the center plate includes a terminal end with a lip for adjustably interfacing with a pedal clamp of a drum beater assembly for connecting the drum beater assembly to the bass drum. The pedal clamp is removably connectable to any point along the lip for laterally adjusting the striking point of a beater head onto the bass drum, the bass drum isolated from the pedal clamp for improving the resonance performance thereof, without changing the length of a beater shaft or the feel of the drum beater assembly.

A HGA of the invention includes a slider, a micro-actuator for adjusting the position of the slider; a suspension to load the slider and the micro-actuator; and a vibration canceller interposed between the micro-actuator and the suspension. The micro-actuator includes a first base-part plate, a pair of actuator side arms extending from the first base-part plate in a first direction, and at least one of side arms has a piezoelectric element thereon. The vibration canceller includes a second base-part plate to connect with the micro-actuator and the suspension; and at least one canceling arm extending from the second base-part plate in the first direction or in a second direction, wherein at least one of canceling arms has a piezoelectric element thereon. The invention also discloses a disk drive with the vibration canceller.

A micro-actuator for a head gimbal assembly includes a support frame including a bottom support adapted to be connected to a suspension of the head gimbal assembly, a top support adapted to support a slider of the head gimbal assembly, and a leading beam that couples the bottom support and the top support. The leading beam includes weak points or notches that allow the top support to rotate about a rotational axis in use. A first PZT element is mounted between first sides of the top and bottom supports, and a second PZT element is mounted between second sides of the top and bottom supports. The first and second PZT elements are excitable to cause selective rotational movement of the top support about the rotational axis in use.

In a piston for a syringe, in particular an injection syringe, which has a hollow body receiving the piston, comprising a piston head for fluid-tight delimitation of a liquid chamber of the syringe, and a piston rod firmly connected to the piston head and having an actuation portion on which the piston can be actuated for insertion into the hollow body, wherein the piston rod is formed by a plurality of axial webs which extend in the longitudinal direction and which have a radial axial extent outwards from the longitudinal axis and open radially into a common intersection portion receiving the longitudinal axis, wherein at least one free excitation edge protruding radially beyond the radial axial extent is provided on the piston rod, which excitation edge can be brought into engagement with an oscillation exciter of the hollow body upon insertion of the piston, in such a way that an acoustic signal is emitted, provision is made that an oscillation arm body arranged between two axial webs couples the excitation edge to the intersection portion in such a way that, in the event of oscillatory excitation in the axial direction, the oscillation arm body has a radial oscillation arm length, between the excitation edge and the intersection portion, of at least 40% of the radial axial extent.

The invention discloses a flexible rubber surface composite screen with a supporting net and a forming method thereof, and solves the problems that an existing device blocks holes, is not wear-resistant and is short in service life. The flexible rubber surface composite screen is characterized by comprising a frame body, a screening area and the supporting net; the frame body comprises a metal framework and a polyurethane coating layer; the screening area is formed by punching a flexible rubber plate; the supporting net is of a net-shaped structure formed by weaving warps and wefts through steel wire rope core polyurethane bars in a vertically and horizontally interwoven mode; and the punched rubber screen surface and the metal framework with the woven supporting net are subjected to secondary pouring together in a mold, the framework and the flexible rubber screen surface are connected into a whole through the polyurethane coating layer, and a finished product is obtained through secondary curing. According to the flexible rubber surface composite screen with the supporting net and the forming method thereof, the flexible rubber screen surface, the polyurethane bar supporting net, the metal framework, the polyurethane coating layer and the like are arranged, so that the problem of hole blocking and pasting of fine-fraction materials in a wet and sticky state can be effectively solved, the screening efficiency of the materials under the wet and sticky condition is effectively improved, the labor and maintenance cost is saved, and the production halt loss is reduced.