A vibration isolation system includes multiple isolators between an inner object and an outer housing that surrounds the object. In one example the inner object may be a rack or container that holds electronics, such as printed circuit boards, and the outer housing may be a housing for a missile, such as a supersonic or hypersonic missile. The isolators have flexures to attenuate vibrations, isolating the inner object at least in part from vibrations encountered by the outer housing. The flexures may be oriented in different directions for different isolators to change the resonant frequency of the system for a given axis. In addition the isolators are able to compensate for differences in expansion between the inner object and the outer housing. The isolators may also include multi-part isolators that have spring-loaded wedge elements used to expand the isolators in one or more radial directions.

A vibration isolation system includes multiple isolators between an inner object and an outer housing that surrounds the object. In one example the inner object may be a rack or container that holds electronics, such as printed circuit boards, and the outer housing may be a housing for a missile, such as a supersonic or hypersonic missile. The isolators have flexures to attenuate vibrations, isolating the inner object at least in part from vibrations encountered by the outer housing. The flexures may be oriented in different directions for different isolators to change the resonant frequency of the system for a given axis. In addition the isolators are able to compensate for differences in expansion between the inner object and the outer housing. The isolators may also include multi-part isolators that have spring-loaded wedge elements used to expand the isolators in one or more radial directions.

A mechanism for mounting in ground, foundation or structure, to provide road, port, railway or similar passive safety for protection of the respective vehicles or structures, having at least one rigid element arranged as a side of a triangle whose basal side rests on the ground, with its first end at the apex of the triangle, its midpoint pivoted to an intermediate element, and with its second end pivoted with respect to at least one friction element; a friction dissipation member; at least one elastic element arranged with its axis in the direction of the degree of freedom; the at least one friction element and at least one rigid element are attached by a coupling element allowing sliding of each friction element perpendicular to the impact load when it compresses the elastic element.

A vibration damper includes an end-stop control valve that progressively adds end-of-stroke damping force to complement the damping force provided by a main piston. The end-stop control valve may include a valve piston assembly that has a valve piston insert, a piston that is disposed radially outside the valve piston insert, and a valve disc stack-up that is supported on a hub of the valve piston insert and a valve seat of the piston. The valve piston insert and the piston may be arranged so as to be longitudinally movable relative to one another. Consequently, the preload of the valve disc stack-up increases as the valve piston assembly contacts a catch piston and begins end-of-stroke damping. Transitioning from an initial preload to a maximum preload during the end-of-stroke damping event progressively increases damping resistance and thereby improves NVH characteristics.

An end-stop control valve can progressively add end-of-stroke damping resistance to complement the damping force provided by a main piston in a damper tube. The end-stop control valve may include a piston that selectively engages with a catch piston, both of which are longitudinally movable within the damper tube. To reduce bypass around the piston, a piston band wrapped at least partially around the piston may engage with a sidewall of the catch piston just prior to engagement of the catch piston and the piston, although at least some hydraulic fluid can flow through a pathway of the piston band. A spring disc that moves with the piston may also engage with the catch piston just prior to engagement between the catch piston and the piston. The spring disc may elastically deform to contribute end-of-stroke resistance leading up to engagement of the piston and the catch piston.

A gimbal sleeve for connecting to a camera gimbal may float between a floor surface and a ceiling surface of an aerial vehicle chassis such that the gimbal sleeve has freedom of motion in yaw, pitch, and roll directions relative to the vehicle chassis. The gimbal sleeve may comprise a pair of connection points to the lower dampers on a floor surface of the vehicle chassis. The gimbal sleeve may furthermore comprise a ball joint coupled to a back surface of the vehicle chassis. The connection points include spring forces that enable the gimbal sleeve to return to an equilibrium position in response to external vibrations and reduce the magnitude of vibrations transferred from the aerial vehicle to the gimbal and camera systems.

A vibration damping device including a vibration-damping device main unit inserted into a mounting space of a bracket from a lateral side and securely supported by the bracket. The bracket includes engaging pieces on respective opposed inside faces of the mounting space, and engaging action of the engaging pieces with respect to respective detent engaging faces formed on a fixture member of the vibration-damping device main unit prevents the vibration-damping device main unit from becoming dislodged from the mounting space of the bracket. Opposed walls of the mounting space are each penetrated by an aperture window, and inspection flat surfaces are separately provided to an outside surface of each engaging piece visible from an outside through the aperture window and a corresponding external side surface of the bracket that is off the aperture window. The inspection flat surfaces are parallel to each other.

A vibration damping device including a vibration-damping device main unit inserted into a mounting space of a bracket from a lateral side and securely supported by the bracket. The bracket includes engaging pieces on respective opposed inside faces of the mounting space, and engaging action of the engaging pieces with respect to respective detent engaging faces formed on a fixture member of the vibration-damping device main unit prevents the vibration-damping device main unit from becoming dislodged from the mounting space of the bracket. Opposed walls of the mounting space are each penetrated by an aperture window, and inspection flat surfaces are separately provided to an outside surface of each engaging piece visible from an outside through the aperture window and a corresponding external side surface of the bracket that is off the aperture window. The inspection flat surfaces are parallel to each other.

A vibration damping device including a vibration-damping device main unit inserted into a mounting space of a bracket from a lateral side and securely supported by the bracket. The bracket includes engaging pieces on respective opposed inside faces of the mounting space, and engaging action of the engaging pieces with respect to respective detent engaging faces formed on a fixture member of the vibration-damping device main unit prevents the vibration-damping device main unit from becoming dislodged from the mounting space of the bracket. Opposed walls of the mounting space are each penetrated by an aperture window, and inspection flat surfaces are separately provided to an outside surface of each engaging piece visible from an outside through the aperture window and a corresponding external side surface of the bracket that is off the aperture window. The inspection flat surfaces are parallel to each other.

Disclosed is a magnetorheological fluid particle impact damper, which includes a damper cavity unit, wherein the damper cavity unit is provided with an electromagnetic coil in a circumferential direction, the damper cavity unit is internally provided with a plurality of horizontal shock absorbers in a uniform manner, and the left and right ends of the damper cavity unit are symmetrically provided with disc-type shock absorbers; the shock absorbers and the disc-type shock absorbers are respectively connected to the inner wall of the damper cavity unit through springs; the horizontal shock absorber includes a horizontal magnetorheological fluid cavity filled with magnetorheological fluid, the horizontal magnetorheological fluid cavity is internally provided with a horizontal impactor container, the horizontal impactor container is internally provided with a first impactor group consisting of several impactors of different sizes; the disc-type shock absorber comprises a disc-type magnetorheological fluid cavity which is filled with magnetorheological fluid; the disc-type magnetorheological fluid cavity is slidably connected to a plurality of disc-type impactor containers, and the disc-type impactor containers are distributed in a circular array and internally provided with a second impactor group; and the present disclosure effectively improves the vibration reduction effect.