The present invention provides a test device for a quasi zero stiffness isolator, and belongs to the technical field of vibration response tests of isolators. The device comprises a negative stiffness adjusting mechanism, a positive stiffness adjusting mechanism, and a beam-damping block mechanism. The negative stiffness adjusting mechanism and the positive stiffness adjusting mechanism are connected successively and installed on a beam-mass block system. The test device for the quasi zero stiffness isolator can realize smooth longitudinal vibration of a tested system, and can also flexibly adjust the positive stiffness value and the negative stiffness value of an overall mechanism. The present invention is suitable for a vibration model test of the quasi zero stiffness isolator, and solves the problems of complicated use method, impossibility of flexible adjustment of mechanism stiffness and complicated replacement process of stiffness elements in the device for the existing quasi zero stiffness isolator.

The invention relates to a thermoplastic polymer composition comprising polyamides, its preparation method and a device for a motor vehicle capable of damping vibrations. The composition (I1, I2, I3, I4) comprises an aliphatic polyamide a polyphthalamide coming from a C6-C12 aliphatic diamine and from an aromatic diacid comprising terephthalic acid, the aliphatic polyamide/polyphthalamide weight ratio being >1 and a reinforcing filler comprising glass fibers. The composition has, after “RH50” conditioning, maximum tan delta values according to ISO 6721-5 between 60-90° C. and 1-3000 Hz, with (i) tan delta >4.20% at 60° C. and/or (ii) tan delta >4.00% at 80° C. and/or (iii) tan delta >3.80% at 90° C.

The invention relates to a thermoplastic polymer composition comprising polyamides, its preparation method and a device for a motor vehicle capable of damping vibrations. The composition (I1, I2, I3, I4) comprises an aliphatic polyamide a polyphthalamide coming from a C6-C12 aliphatic diamine and from an aromatic diacid comprising terephthalic acid, the aliphatic polyamide/polyphthalamide weight ratio being >1 and a reinforcing filler comprising glass fibers. The composition has, after “RH50” conditioning, maximum tan delta values according to ISO 6721-5 between 60-90° C. and 1-3000 Hz, with (i) tan delta >4.20% at 60° C. and/or (ii) tan delta >4.00% at 80° C. and/or (iii) tan delta >3.80% at 90° C.

A target device includes: a first tray located at a bottom of the target device; at least one second tray located above the first tray; and a damping resonator detachably installed in the first tray. A resonance frequency acquisition device is disposed in the at least one second tray configured to obtain a target resonance frequency of the target device, and the damping resonator is configured to suppress a resonance response of the target device at the target resonance frequency.

A target device includes: a first tray located at a bottom of the target device; at least one second tray located above the first tray; and a damping resonator detachably installed in the first tray. A resonance frequency acquisition device is disposed in the at least one second tray configured to obtain a target resonance frequency of the target device, and the damping resonator is configured to suppress a resonance response of the target device at the target resonance frequency.

An energy transmission control mount comprises a carrier having a first major surface, an opposite second major surface and an aperture provided therein. Channels are provided adjacent opposite ends of the first surface. Vibration dampening material is provided on the carrier. The vibration dampening material substantially lines the channels and the aperture and extends over at least a portion of the second surface.

An energy transmission control mount comprises a carrier having a first major surface, an opposite second major surface and an aperture provided therein. Channels are provided adjacent opposite ends of the first surface. Vibration dampening material is provided on the carrier. The vibration dampening material substantially lines the channels and the aperture and extends over at least a portion of the second surface.

An active inertial damper system (100) and method for damping vibrations (V1,V2) in a structure (11). An inertial mass (2) is supported by a support frame (1) via spring means (3) to form a mass-spring system (2,3) having a resonance frequency (fn). A controller (6) is configured to control a force actuator (4) to adapt the driving force (Fd) as a function of measured vibrations (V1,V2). The controller (6) comprises a filter (H) determining a magnitude (M) of the driving force (Fd) as a function of frequency (f) for the measured vibrations (V1,V2) in the structure (11). The filter (H) is configured to provide an anti-resonance dip in the magnitude (M) of the driving force (Fd) at the resonance frequency (fn) of the mass-spring system (2,3) to suppress resonant behaviour of the mass-spring system (2,3) itself.

The present invention relates to a laundry treating apparatus. The laundry treating apparatus according to an embodiment of the present invention includes a control unit which controls the tub to rotate at a first speed in a case of a blanket dehydration mode, to rotate at a second speed lower than the first speed so that the plurality of balls are dispersed when amount of eccentricity in the first speed rotation is equal to or greater than a first reference value, and to rotate at a third speed higher than the first speed when the amount of eccentricity in the first speed rotation is less than the first reference value. Accordingly, in a blanket dehydration mode, it is possible to stably perform dehydration by preventing the plurality of balls from operating unbalanced.

A method and an apparatus for isolating a vibration of a positioning device are provided. The apparatus includes a base plate for the positioning device, at least one active bearing element for bearing the base plate on/at a foundation and at least one evaluation and control device. The apparatus includes at least one means for determining a foundation movement-dependent quantity, wherein the active bearing element is controllable by the at least one control and evaluation device on the basis of the foundation movement-dependent quantity.