Abstract: An oleo strut includes an outer cylinder forming a first fluid chamber and an inner cylinder forming a second fluid chamber. The inner cylinder is adapted for sliding concentrically within the outer cylinder in a longitudinal direction. An orifice plate, which is located within the inner cylinder, has holes for fluidly coupling the first fluid chamber with the second fluid chamber. A free-floating washer is constrained in a slot of the orifice plate adjacent the holes and is adapted to move in the longitudinal direction for alternatively blocking and unblocking at least a portion of the holes. During compression of the oleo strut, fluid pushes the washer away from the holes for reducing resistance to fluid flow. During extension of the oleo strut, fluid pushes the washer against the orifice plate covering at least a portion of the holes, which increases the damping force and reduces the extension speed.

Abstract: A tuned mass absorber assembly comprises a mass structure, and a flexure system comprising first and second flexure sections (e.g., cross bar flexures) supported by, and extending in opposing directions from, the mass structure. The flexure system can comprise flexure section mounts situated at distal ends of the first and second flexure sections, respectively, and that are operable to mount the tuned mass absorber assembly to a structure subject to induced vibrations therein. A mass of the mass structure and a stiffness of the flexure system can be tuned to attenuate vibrations at a specific input frequency generated in response to induced vibrations of the structure. A system can comprise a vibration isolator attached to a chassis (e.g., of an airplane), and supporting a payload (sensors(s)) and isolating the payload from vibrations. A tuned mass absorber assembly can be mounted to the vibration isolator for attenuating vibrations at a specific input frequency that may affect the payload.

Abstract: For the purpose of redundancy, ports are provided for a separate power brake pressure unit on a hydraulic block of a hydraulic unit of a slip control system of a hydraulic vehicle power braking system. The ports are attached as cylindrical collars to the hydraulic block by friction welding.

Abstract: A brake and method of assembly are provided. The brake includes a friction plate configured for coupling to a rotatable body for rotation with the rotatable body about an axis of rotation, a pressure plate disposed about the axis on a first side of the friction plate and fixed against rotation, and an armature plate disposed about the axis on a second side of the friction plate. An electromagnet is disposed about the axis on an opposite side of the armature plate relative to the friction plate. A spring biases the armature plate in a first axial direction towards the friction plate and away from the electromagnet to engage the brake. A fastener couples the pressure plate to the electromagnet. The fastener conforms to a space between opposed surfaces of the pressure plate and the electromagnet and, upon hardening, bonds the pressure plate to the electromagnet.

Abstract: Disclosed herein is an integrated combination of materials within a vesicle, comprising a space filling porous or fibrous structure and an engineered nonuniform elastic truss to form an impact mitigating Hybrid Material System (HMS). The macroscale and microscale structures within the HMS can be configured to absorb kinetic energy and reduce the forces transmitted by impacts through the HMS to any surface or body in contact with the HMS.

Abstract: A belt-like rib that extends in a peripheral direction is provided to the outer surface, in the axial direction, of an outer body. The inner diameter side sections of the bottoms of outer cylinders at the outer diameter side and the outer diameter side sections of the bottoms of outer cylinders at the inner diameter side, all the cylinders being provided to the outer body so as to be separated into two stages in the radial direction, are covered with the belt-like rib from outside in the axial direction so as to traverse along the peripheral direction. The outer diameter side sections of the bottoms of the outer cylinders at the outer diameter side and the inner diameter side sections of the bottoms of the outer cylinders at the inner diameter side are made to protrude from the belt-like rib in the radial direction.

Abstract: A motor control device includes a drive control device that controls turning on/off of a motor, and a voltage obtaining device that obtains a voltage across terminals of the motor. The drive control device determines whether or not the motor drive signal is OFF (ST01). If the determination is Yes, the drive control device determines whether or not the voltage across the terminals, which is obtained by the voltage obtaining device, has decreased and reached a target voltage (ST02). If the determination at ST02 is Yes, an ON time is set on the basis of the immediately preceding OFF time (ST03), and the motor drive signal is switched from OFF to ON (ST04). After the ON time elapses, the motor drive signal is switched from ON to OFF (ST05). Low-rotational-speed motor control can be performed while suppressing heat generation in a motor relay.

Abstract: A blade flexure assembly that includes first and second mounting structures. Two or more flexure blades are connected to and extend between the first and second mounting structures. Clamping blocks clamp the flexure blades to the mounting structures. The modular design of the assembly provides for replacing one or more of the flexure blades to adjust one or more functional aspects of the assembly.

Abstract: Methods and apparatus for position sensitive dampening. In one aspect a fluid damper is provided comprising a damper chamber divided by a piston into a primary compression and a primary rebound chamber; a secondary compression chamber in fluid communication with the damper chamber; and an adjustable fluid meter controlling fluid flow out of the secondary compression chamber.

Abstract: An energy absorbing beam comprises a top plate and a bottom plate, a plurality of upper pillars extending from the top plate toward the bottom plate, a plurality of lower pillars extending from the bottom plate toward the top plate, and a first beam extending laterally between the top plate and the bottom plate and attached to the upper and lower pillars, wherein energy from an impact onto the top or bottom plate is transferred through the upper and lower pillars and absorbed by the first beam.

Abstract: A method for electronically controlling a pneumatic brake system in a vehicle includes determining that a failure or a defect has occurred in electronic actuation of wheel brakes of the pneumatic brake system, and electronically actuating a pilot valve via a redundancy signal in response to determining that the failure or the defect in the electronic actuation has occurred so as to actuate the wheel brakes in a redundant electropneumatic manner. The redundancy signal is specified in such a manner that the pilot valve alternately turns for a pulse time into a second switch position and for a pause time into a first switch position. The pilot valve outputs, as a pilot pressure, a low pressure level in the first switch position and a high pressure level in the second switch position. The wheel brakes are actuated using a service brake braking pressure that is dependent upon the pilot pressure.

Abstract: In a hydraulic brake system, which includes: a hydraulic pump which is driven by an electric motor and has the purpose of generating a fluid volume flow for the hydraulic brake system; a hydraulic connection for conducting the fluid volume flow between the hydraulic pump and a wheel brake; a reservoir for storing a fluid volume; wherein the reservoir is connected to the hydraulic connection by means of a switching valve, a method includes actuating the switching valve in such a way that by this means a fluid pulsation in the hydraulic connection is counteracted. Furthermore, the method may be implemented with a control unit and a hydraulic brake system.

Abstract: A rigid tether for use with a friction brake. The tether has a rigid handle with a brake hole at one end designed for mounting a friction brake to rotate about the brake hole. A pulley arm with pulley is attached to rotate about the other end of the handle. The pulley arm is two parallel plates, a fixed plate and a gate plate, with an axle between them on which is mounted the pulley. The plates, pulley, and handle define a rope slot. The gate plate can pivot on the axle to provide access to the rope slot.

Abstract: A vibration damper including a plate-shaped metal bracket having an attachment, and first and second extended parts extending from the attachment toward mutually opposite sides. Edge flanges rise from both widthwise edges of the attachment across its entire length. The first extended part includes the edge flanges extending continuously from the attachment and a pair of rising walls rising on both widthwise sides thereof. A first dynamic damper including a pair of support rubber elastic bodies and a mass member is provided between the rising walls. The second extended part includes a rising supporter rising from its end and the edge flanges being continuous with the attachment across its entire length including the rising supporter. A second dynamic damper including an inner shaft member and an outer mass member elastically connected by a main rubber elastic body is attached to the rising supporter.

Abstract: An integrated electric booster braking system with a pedal force compensation function, comprising a booster motor, a first gear, a second gear, a lead screw, a brake master cylinder, a pedal push rod, a master cylinder push rod, a fluid storage tank, a hydraulic control unit and an electric control unit, wherein first gear and second gear are assembled in a housing, first gear is engaged with the second gear, the booster motor is connected with the first gear and drives the first gear to rotate, the first gear drives the second gear to rotate during rotation, the second gear is in threaded connection with the lead screw, the second gear drives the lead screw to move during rotation, the lead screw is of a hollow structure, and the rear end of the lead screw is abutted with the front end of a first piston in the brake master cylinder.

Abstract: The disclosure relates to a brake system for a baby or child vehicle, and more particularly, to a brake system for a baby or child vehicle, in which the movement of the vehicle is controlled by locking a brake while an occupant is getting off the vehicle, and automatically releasing the brake in only a case where it is checked that the occupant is getting on the vehicle, thereby preventing a falling accident caused by the movement of the vehicle when the occupant gets on or off the vehicle or while a toddler stands up on the vehicle.

Abstract: Fiber-reinforced polymer composites possessing improved damping ability are provided. In one aspect, the fibers provide the composite with a relatively high dynamic modulus over a broad range of frequencies for a given temperature. In another aspect, the polymer may comprise a viscoelastic polymer possessing a relatively high loss factor for a given frequency and temperature. The polymer may be further tailored to control the center frequency at which the maximum loss factor of the polymer is achieved. The composite so formed exhibits a relatively small reduction in loss factor with significant increase in dynamic modulus over a broad range of frequencies for a given temperature. As a result, a structure damped by the composite exhibits a relatively high, constant loss factor as compared to conventional damping materials. Thus, embodiments of the disclosed composites dissipate significantly more energy during each vibration cycle than conventional damping materials.

Abstract: An additively manufactured metering pin may comprise a shaft portion comprising a first end and a second end, a head portion disposed at the second end of the shaft portion, and a slot disposed in the head portion, the slot extending through a perimetrical surface of the head portion and an end surface of the head portion.

Abstract: The disclosed inventive concept provides an electrically conductive mechanical vibration isolator for providing an electrical path between parts of a vehicle in order to alleviate the need for ground straps. The conductive isolator disclosed herein includes an inner shell, an outer shell, an elastomer disposed therebetween, and a conductor interconnecting the inner and outer shells to create an electrical path therebetween. In one embodiment, the conductor is at least one conducting wire having opposite ends electrically bonded to the inner and outer shells. In another embodiment, the elastomer may comprise a plurality of conductive particulates distributed throughout the elastomer. In yet another embodiment the elastomer may include at least one channel formed therein and extending between the inner and outer shells for storing a conductive liquid therein. The conductive liquid is contained between the shells and provides an electrical path therebetween.

Abstract: A device for securing braking devices to a chassis frame of a rail vehicle forming a cross-member of the chassis frame that has a longitudinal axis, and includes at least two securing points for braking devices, wherein the securing points are spaced apart from the cross-member in a longitudinal direction which lies normal to the longitudinal axis, where at least one respective securing point is arranged at the end on a continuous brake carrier having an open cross section, where a connector is provided, via which the brake carrier is both connected to the cross-member and is spaced apart from the cross-member in a vertical direction to reduce the weight and so as not to simultaneously increase the warp stiffness of the chassis frame.