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1069 results about "Linear vibration" patented technology

Linear Vibration: Linear vibration is the most familiar to everyone. This is the shaking and movement of equipment we can easily see, feel, and hear. As a rule, linear vibrations are related to some type of mechanical imbalance, misalignment, or wear.

Stabilization system for sensors on moving platforms

ActiveUS20110175604A1Improve mass balanceSmall biasAcceleration measurementFrequency analysisRotational stabilityAir bearing
A stabilized field sensor apparatus collects field data, in particular magnetic field data, with reduced motion noise. The apparatus includes a tear drop shaped housing, a tow frame in the housing, a plurality of vibration isolating dampers spaced around the frame, a base assembly mounted to the dampers, a support pedestal having a bottom end fixed to the base assembly and an upper free end, a single spherical air bearing connected to the upper free end of the pedestal, an instrument platform with a lower hollow funnel having an upper inside apex supported on the air bearing for a one point support, principal and secondary gyro stabilizers for maintaining pivotal and rotational stability, and at least one field sensor mounted to the instrument platform for collecting the field data while being stabilized against motion noise including vibration, pivoting and rotation from the base assembly, from the tow frame and from the housing. Stabilization of the instrument platform is enhanced by preserving accurate balance through a dynamic balancing system whereby small masses are moved under computer control to maintain the center of mass of the instrument platform at the center of rotation of the spherical air bearing. The dynamic stabilization process is made more precise by actively vibrating the instrument platform by a set of linear vibrators.
Owner:VALE LIMITED

Light-type triaxial ISP (inertially stabilized platform) system using aerial remote sensing technology

The invention provides a light-type triaxial ISP (inertially stabilized platform) system using an aerial remote sensing technology, comprising a base, four linear vibration dampers, a rolling framework, a pitching framework, a direction framework, two MEMS (micro-electromechanical system) accelerometers, three MEMES gyroscopes, three DC (direct current) brushless torque motors, three sets of reduction gears, three photoelectric encoders and three framework servo control circuits, wherein the base is connected with a plane by the four linear vibration dampers so as to separate linear vibration; the rolling framework and the pitching framework are used for tracking the local geographical level and rotate around the X axis and the Y axis respectively; and the direction framework is used for tracking heading and rotates around the Z axis. The control part drives the three DC brushless motor frameworks to carry out compensation isolation on angular motion of the plane in accordance with angular rate information of the frameworks provided by the three MEMS gyroscopes and attitude information provided by a POS (position and orientation system) or the two EMES accelerators. The light-type triaxial ISP system has the characteristics of high accuracy, high load bearing/self weight ratio, wide stable range, small volume and light weight as well as self-attitude reference, and is suitable for stabilizing the camera visual axis in light-small type aerial remote sensing systems.
Owner:BEIHANG UNIV

Damping-adjustable vibration isolation platform with quasi-zero stiffness

ActiveCN103899704ASolve the problem of isolating low frequencySolve the problem of ultra-low frequency vibrationNon-rotating vibration suppressionSemi activeBearing vibration
The invention discloses a damping-adjustable vibration isolation platform with quasi-zero stiffness. The damping-adjustable vibration isolation platform comprises a bearing assembly, a fixed platform frame and damping assemblies. The bearing assembly is used for bearing vibration isolation objects. The fixed platform frame is provided with an open end and a cavity which is communicated with the open end, and the bearing assembly and the damping assemblies are contained in the cavity. The damping assemblies comprise the damping-adjustable upper damping assembly and the damping-adjustable lower damping assembly which are arranged in the cavity in the longitudinal direction, and the bearing assembly is connected with the fixed platform frame through the upper damping assembly and the lower damping assembly. The vibration isolation platform solves the difficulty existing when a traditional linear vibration isolation system isolates low frequency or ultra-low frequency vibration, and also overcomes the defects that an active or semi-active control vibration isolation device is complex in structure, high in manufacturing cost, high in energy consumption and the like; the vibration isolation platform is simple in structure, applicable to wide-frequency-domain vibration isolation, capable of being widely applied to precise equipment with strict vibration isolation requirements and has good engineering adaptability. Besides, damping is simple and convenient to adjust.
Owner:ANHUI UNIVERSITY OF TECHNOLOGY AND SCIENCE

Parallel mechanism based multidimensional vibration platform

ActiveCN104154170AAchieving Nonlinear StiffnessSolve the problem of isolating low frequencySpringsShock absorbersEngineeringUltra low frequency
The invention discloses a parallel mechanism based multidimensional vibration platform. Standard zero stiffness of a vibration isolation platform at the equilibrium position and nonlinear stiffness nearby the equilibrium position can be realized by setting certain structural parameters, and the problem about difficulty in isolating low-frequency or ultra-low-frequency vibration for a traditional linear vibration isolation system; stiffness and damping can be easily and conveniently adjusted, vibration isolation of broad frequency domains are satisfied, and good engineering applicability is achieved; the multidimensional vibration platform is high in bearing stiffness, low in movement stiffness, small in static deflection, low in dynamic inherent frequency and good in vibration isolation effect; inherent contradictions restricting the traditional vibration isolation system, namely the contradictions of low-frequency vibration transmissibility and high-frequency vibration attenuation, can be solved by flexible adjustment of the stiffness and damping; the height and the static equilibrium position of the entire platform can be changed by adjusting a shock absorber spring base in height, and the multidimensional vibration platform is applicable to vibration isolation of objects of different weight.
Owner:ANHUI UNIVERSITY OF TECHNOLOGY AND SCIENCE

A multifunctional aviation remote sensing three-axis inertial stabilization platform system

The invention discloses a multifunctional aerial remote sensing triaxial inertially stabilized platform system, which consists of a main body part and an auxiliary part, wherein the main body part comprises a three-frame system, a driving system, an inertia measurement system, an angular position measurement system and a control system; the auxiliary part comprises a power two-phase knob, a power indicator lamp, a control mode three-phase knob, a control mode indicator, a mechanical locking knob, a manual operation knob, a roll horizontal indicator, a pitch horizontal indicator, a power interface, a point of sales (POS) signal interface, a personal computer (PC) signal interface and four transportation handles. Under the guidance of a POS or the inertia measurement system, the three-frame system tracks a local level and performs real-time compensation and isolation on the angular motion and linear vibration of an airplane to stabilize an optical axis of a camera. The multifunctional aerial remote sensing triaxial inertially stabilized platform system has an automatic working mode, a local leveling working mode, a manual working mode, an electric locking function and a mechanical locking function, can work with the POS or without the POS, and is high in accuracy, flexible in operation and applicable to complicated aerial remote sensing and mapping.
Owner:BEIHANG UNIV

Automatic mud-flat shellfish collecting machine

An automatic mud-flat shellfish collecting machine comprises a helical shaft driving motor, a bidirectional helical shaft, a helical shaft support, a turbine disc driving motor, a linear vibration screen, a self-locking linear turbine push rod, a shellfish collecting groove, a conveying belt, a conveying belt roller shaft assembly, a secondary screening hopper, a cleaning pipeline, a power motor support, a water storage groove, a power motor, a front wheel, a linear vibration screen driving motor, an eccentric shaft, a conveying belt driving motor, a shellfish guide plate, a self-sucking type water pump, a rear wheel, a transmission chain assembly, a rear transmission shaft, a front transmission shaft, a shellfish digging shovel, a frame, a bearing and a turbine disc. The rear transmission shaft and the front transmission shaft are mounted on the lower portion of the frame, the rear wheel and the front wheel are mounted on the rear transmission shaft and the front transmission shaft, the rear transmission shaft is connected with the power motor by the transmission chain assembly, a power motor support is arranged outside the power motor, one end of the cleaning pipeline penetrates the power motor support to be connected with a water storage groove, and the other end of the cleaning pipeline is connected with the secondary screen hopper.
Owner:ZHEJIANG OCEAN UNIV
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