Systems and methods for dampening dynamic loading between two bodies are described. An example dampening system includes a non-ferrous metal body attached to a second body and a stack of magnets attached to a third body. The stack of magnets is movably disposed within or around the non-ferrous metal body, and adjacent magnets are arranged in an opposed polar relationship, whereby relative movement of said second and third bodies is damped. An example method of dampening dynamic loading includes arranging a plurality of magnets along an axis to form at least one pair of magnets having an opposed polar relationship along the axis. The method further includes axially moving the at least one pair of magnets relative to a non-ferrous metal body, so as to dampen dynamic loading of a payload attached to a vehicle.

The present invention discloses a quasi-zero-stiffness (QZS) based six-degree-of-freedom (6-DOF) absolute displacement and attitude measurement device. A lower end coil and an upper end coil are respectively charged with currents in the opposite directions; The electromagnetic field and the magnetic fields of an upper magnet and a lower magnet per se are mutually acted to produce an electromagnetic stiffness opposite to the stiffness of a spring. The stiffness of the whole leg is close to zero stiffness. When the to-be-measured platform generates space motion, the reference platform is in the stationary state. At this point, the deformation amounts of the six legs can be measured by laser displacement sensors. The six deformation amounts are respectively inputted into the displacement and attitude resolver, and by forward kinematic solution of the 6-DOF device, the displacement and the attitude of the to-be-measured platform can be obtained.

A suspension assembly having a shaft with a first end and a second end. The first end of the shaft is mounted to a force receiving member. The shaft is translatable within a linear bearing, which is mounted to a support member. A first magnet is mounted to the force receiving member and a second magnet is mounted to the support member. A shaft collar is mounted to the second end of the shaft. The first and second magnets are adapted to provide a magnetic force against a force applied to the force receiving member.

Magnetic vibration damper includes three coaxial elements: a first coaxial element with first permanent magnets, a second coaxial element with first soft magnets and a third coaxial element with second permanent magnets. The first soft magnets are located between the first permanent magnets and the second permanent magnets in a radial direction. The spacing of the second permanent magnets is larger than the spacing of the first permanent magnets. The damper further includes an energy conversion component, such as conductive layers or coils to convert the mechanical movement of the magnets into heat or electric current.

A vibrational decoupling interface connects between handle shafts of power tools such as lawnmowers, line trimmers and the like. The interface has a housing coupled to one of the shafts and having a channel having a first magnet at a first end thereof and a second magnet at a second end thereof. The channel further has a travelling magnet travelling between the first and second magnets, the magnets arranged such that the travelling magnet is repelled from the first and second magnets and the travelling magnet is coupled to the other shaft to thereby reduce the transmission of vibration between the shafts.

An aircraft undercarriage comprising a telescopic linear rod (0, 0, 0) comprising first and second sliding rod portions. The undercarriage further comprises: a first permanent magnet set (1a, 1a, 1a) fastened to the first rod portion (1, 1, 1); and a second permanent magnet set (2a, 2a, 2a) fastened to the second rod portion (2, 2, 2); the first and second permanent magnet sets (1a, 1a, 1a, 2a, 2a, 2a) generating a magnetic repulsion force between the first rod portion (1, 1, 1) and the second rod portion (2, 2, 2) and maintaining a first annular space (E1) between the first rod portion and the second rod portion.

A linear displacement damper structure includes a screw shaft, a metallic disk, a screw barrel, a controlling member, and a driving member. The screw shaft is fixed in a position, connected to the metallic disk, and threaded with the screw barrel. The screw barrel is connected to an external device and driven by the external device to perform a linear displacement along a length direction of the screw shaft relative to the screw shaft, so that the screw shaft drives the screw shaft and the metallic shaft. The controlling member has a permanent magnet and is disposed near to the metallic disk, so that the metallic disk generates a magnetic resistance to reduce the rotation speed of the metallic disk. The driving member drives the controlling member to move to change a distance between the controlling member and the metallic disk to adjust the magnitude of the magnetic resistance.

A negative stiffness generating mechanism and a quasi-zero stiffness vibration isolator are provided. A housing is mounted on a base, and the axial relative positions of the housing and the base can be adjusted; a negative stiffness unit comprises inner-ring magnets, outer-ring magnets and a supporting shaft, the supporting shaft axially slides on the base and passes through the housing, the inner-ring magnets fixedly sleeve the supporting shaft, and the outer-ring magnets sleeve outside the inner-ring magnets and are divided into upper and lower groups of outer-ring magnets; the upper and lower groups of outer-ring magnets can synchronously move through a negative stiffness adjusting device; and the axial relative positions of the middle planes of the outer-ring and inner-ring magnets can be adjusted by adjusting the axial relative positions of the housing and the base. The isolator comprises a negative stiffness generating mechanism and a positive stiffness unit.

A system for reducing the effect of a force includes a panel having a first side and a second side; a plurality of contact members disposed around a perimeter of the panel first side; and a biasing member positioned around a perimeter of the panel second side. The perimeter of the panel second side generally corresponds to the perimeter of the panel first side. The biasing member biases the contact members toward the panel first side. In a use configuration, a force received by the panel second side is at least partially transferred to the contact members causing at least one of the contact members to temporarily lose contact with the panel first side, whereby the return of the contact member into contact with the panel first side imparts a second force onto the panel first side, the second force being less than the force transferred to the contact members.

A single-degree-of-freedom magnetic vibration isolation device belongs to vibration isolation devices and solves the following problems: the existing active and passive combined vibration reduction system is complex in structure, needs energy supply, and has low reliability. The present invention includes a metal conductor sleeve, a base, an upper annular permanent magnet, a lower annular permanent magnet, a connecting rod and a center permanent magnet; poles of the upper annular permanent magnet and the lower annular permanent magnet facing to each other have reverse polarity, which are connected to an upper end and a lower end of an inner wall of the metal conductor sleeve respectively; the center permanent magnet is concentrically sleeved on the connecting rod and fixedly connected therewith, and the center permanent magnet is located between the upper annular permanent magnet and the lower annular permanent magnet, and is capable of moving axially together with the connecting rod between the upper annular permanent magnet and the lower annular permanent magnet; and the pole of the center permanent magnet facing to the poles of the upper annular permanent magnet and the lower annular permanent magnet have reverse polarity. The present invention is simple in structure, does not need energy supply, has high reliability, and can generate a static magnetic force and a dynamic magnetic force. Connecting the device according to the present invention with a passive vibration isolation system in parallel can effectively improve the passive vibration isolation performance of the original system.