A device configured for insertion between two parts of a rotary wing aircraft that are likely to undergo a repeated relative movement. The device includes at least two frame elements intended to be mounted on at least one of the two parts of the aircraft, and at least one layer of elastomer positioned between the two frame elements, the at least one layer defined by a first surface belonging to the inner volume of the device, a second surface also belonging to the inner volume of the device, and an outer surface not belonging to the inner volume of the device. The inner volume of the device includes at least two independent pouches each positioned at a predetermined distance from the outer surface, each pouch being filled with a product capable of flowing outside its pouch when a crack has spread from said outer surface toward the pouch in question.

A friction-damping energy absorber has at least one sliding post, a sliding sleeve, and two supporting boards. The at least one sliding post has two ends. Each one of the at least one sliding post is composed of multiple first material layers and multiple second material layers arranged in an alternate manner mounted. The sliding sleeve is mounted around at least one part of the at least one sliding post and is composed of at least one sliding unit. The supporting boards are respectively mounted on two ends of the at least one sliding post.

A head unit system for controlling motion of an object includes a secondary object sensor, shear thickening fluid (STF), and a chamber configured to contain a portion of the STF. The chamber further includes a front channel and a back channel. The head unit system further includes a piston housed at least partially radially within the piston compartment and separating the back channel and the front channel. The piston includes a first piston bypass and a second piston bypasses to control flow of the STF between opposite sides of the piston. The chamber further includes a set of fluid manipulation emitters to control the flow of the STF to cause selection of one of a variety of shear rates for the STF within the chamber.

A friction-damping energy absorber has at least one sliding post, a sliding sleeve, and two supporting boards. The at least one sliding post has two ends. Each one of the at least one sliding post is composed of multiple first material layers and multiple second material layers arranged in an alternate manner mounted. The sliding sleeve is mounted around at least one part of the at least one sliding post and is composed of at least one sliding unit. The supporting boards are respectively mounted on two ends of the at least one sliding post.

A head unit system for controlling motion of an object includes a secondary object sensor, shear thickening fluid (STF), and a chamber configured to contain a portion of the STF. The chamber further includes a front channel and a back channel. The head unit system further includes a piston housed at least partially radially within the piston compartment and separating the back channel and the front channel. The piston includes a first piston bypass and a second piston bypasses to control flow of the STF between opposite sides of the piston. The chamber further includes a set of fluid manipulation emitters to control the flow of the STF to cause selection of one of a variety of shear rates for the STF within the chamber.

The invention relates to a damping arrangement comprising a wire or steel cable element (2), passing helically around a longitudinal axis of the damping arrangement (1) in several coils, and a counter-element (3), wherein the counter-element (3) is designed as a bar, wherein a section of the counter-element (3) is arranged non-positively coupled and/or frictionally coupled inside the wire or steel cable element (2) such that the coils of the wire or steel cable element (2) in the section pass around the bar, or wherein the counter-element (3) is designed as a sleeve in which a section of the wire or steel cable element (2) is arranged non-positively coupled and/or frictionally coupled such that the coils of the wire or steel cable element (2) extend inside the section of the sleeve, and wherein the wire or steel cable element (2) and the counter-element (3) are movable relative to one another in the direction of the longitudinal axis (I) such that frictional forces result.

A head unit system for controlling motion of an object includes a shear thickening fluid (STF) and a chamber configured to contain a portion of the STF. The chamber further includes a front channel and a back channel. The head unit system further includes a piston housed at least partially radially within the piston compartment and separating the back channel and the front channel. The piston includes a first piston bypass and a second piston bypasses to control flow of the STF between opposite sides of the piston. The chamber further includes a set of fluid manipulation emitters to control the flow of the STF to cause selection of one of a variety of shear rates for the STF within the chamber.

A friction assembly is provided that can include a body, a frame, and a wear liner. The body can include a first connection side having a cavity with one or more protrusions. The frame can be coupled with the one or more protrusions. The frame can have a first wear surface that can engage a working surface of a vehicle. The wear liner can be coupled to the first connection side of the body and the frame. The wear liner can have a second wear surface to engage the working surface. The wear liner can be coupled with the frame such that at least a portion of the wear liner is positioned between the frame and the body. The frame and the wear liner can be comprised of different materials. For example, the frame can be comprised of metal and the wear liner can be comprised of a composite material.

A head unit system for controlling motion of an object includes a head unit module of a set of head unit devices and a ramp shaped plate that contacts the head unit module using an engagement approach. Head unit devices of the head unit module include shear thickening fluid (STF) and a chamber configured to contain the STF. A piston moves through the chamber as a result of the motion of the object and the STF resists the movement of the piston to control the motion of the object.

A head unit system for controlling an object includes a secondary object sensor and a head unit device that include shear thickening fluid (STF) and a chamber configured to contain the STF. The chamber further includes a front channel and a back channel. The head unit device further includes a piston housed at least partially radially within the piston compartment and separating the back channel and the front channel. The piston includes a first piston bypass and a second piston bypasses to control flow of the STF between opposite sides of the piston. The chamber further includes a set of fluid flow sensors and a set of fluid manipulation emitters to control the flow of the STF to cause selection of one of a variety of shear rates for the STF within the chamber to control motion of the object with regards to a secondary object.