摘要:
A reconfigurable tool and/or die geometry and methods of use generally comprise forming at least a portion of a shape defining surface with a shape memory material. In response to an activation signal, the shape memory material changes geometry of the shape defining surface to provide a means for forming parts with different geometries from the same tool and/or die. In an alternative embodiment, an insert for a tool and/or die can be used, wherein the insert has at least a portion of its shape defining surface formed of a shape memory material. Also disclosed are processes for forming a first part with a defined geometry and a second part with a defined geometry different from the first part defined geometry using a reconfigurable tool and/or die as well as a reconfigurable insert with a standard tool and/or die.
摘要:
A system for controlling fluid flow about a vehicle. The system comprises a fluid flow control device, an obstacle sensor for detecting obstacles, and a controller. The fluid flow control device has a body with at least one surface and an actuation means in operative communication with the surface. The actuation means is operative to alter at least one attribute of the fluid flow control device in response to a control signal. The controller has control logic for generating the control signal in response to the obstacle sensor.
摘要:
An active material hood impact mitigation mechanism is activated in response to a signal generated from an impact sensor or pre-impact sensor or manually. The mitigation mechanism is capable of changing either reversibly or irreversibly the stiffness, shape, location, orientation, or displacement force of the hood either globally or locally, before an impact against the hood. The active material mitigation mechanism is held in a device designed to be installed in operative communication with the hood surface. The active material is characterized by a first shape or stiffness and is operative to change to a second shape or stiffness in response to the activation signal. Such active materials include shape memory alloys, electroactive polymers, shape memory polymers, magnetic shape memory alloys, magnetorheological fluids, magnetorheological elastomers, electrorheological fluids, and piezoelectric materials.
摘要:
Force and deceleration delimiting devices and methods for operating the same in a vehicle. The devices generally include an open celled material expandable from a non-expanded state to an expanded state, wherein the open celled material is sandwiched between a first end cap member and a second end cap member; an optional support surface cooperatively positioned with the open celled material to cover a surface of the open celled material in the expanded and the non-expanded states; and an optional shield cooperatively positioned with the open celled material to cover a surface of the open celled material in the expanded and the non-expanded states; and an activation mechanism adapted to regulate selective expansion of the open celled material from the non-expanded state to the expanded state in response to a triggering event, wherein the support surface and/or shield have a compact shape when the open celled material is in the non-expanded state and an expanded state when the open celled material is in the expanded state.
摘要:
A reversible energy absorbing assembly including a shape memory foam disposed within an interior region, wherein the shape memory foam is adapted to expand to an expanded configuration in response to fluid communication with a fluid source. The shape memory foam is a material selected from the group consisting of shape memory alloys and shape memory polymers. Once expanded, the assembly effectively absorbs kinetic energy of an object upon impact with the assembly. The shape memory foam can be thermally activated to restore the original configuration of the energy absorbing assembly. Methods of operating the energy absorbing assembly are also disclosed.
摘要:
Disclosed herein is a locking mechanism for positioning or locking an article comprising a housing 3; an optional active element 6 in operative communication with a connecting means 22, wherein the active element 6 and the connecting means 22 are disposed within the housing 3; wherein the active element 6 upon being activated is capable of exerting a force on the connecting means 22; a compression initiation element 4 located within the housing 3, wherein the compression initiation element 4 comprises a shape memory material, and wherein the compression initiation element 4 upon activation facilitates the activation of the active element 6; and a spring stack 8 disposed adjacent to the compression initiation element 4, wherein the spring stack 8 is in operative communication with the compression initiation element 4 and wherein the spring stack 8 is configured to radially expand within the housing 3.
摘要:
Disclosed herein is a locking device comprising a striker; and a latch in operative communication with an actuator that comprises an active material; wherein the latch is adapted to engage the striker in direct proportion to an applied activation signal. Disclosed herein too is a method for assisting a final closing motion of a suspended body with respect to a supporting body comprising moving the suspended body to within a defined distance from the supporting body; and activating a locking device, wherein the locking device comprises a striker; a latch in operative communication with an actuator that comprises an active material; wherein the latch is adapted to engage the striker in direct proportion to an applied activation signal.
摘要:
Active seal assemblies employing active materials that can be controlled and remotely changed to alter the seal effectiveness, wherein the active seal assemblies actively change modulus properties such as stiffness, shape orientation, and the like. In this manner, in seal applications tailored for vehicles such as in a vehicle door application, door opening and closing efforts can be minimized yet seal effectiveness can be maximized.
摘要:
An exhaust system includes an exhaust conduit; a piezoelectric patch secured to the exhaust conduit; a sensor in operative communication with the exhaust conduit; and a controller in operative communication with the piezoelectric patch and the sensor, wherein the controller is configured to provide a signal to the piezoelectric patch and modify a sound emitted from the exhaust system. A method includes producing an exhaust gas in an exhaust conduit of an exhaust system; measuring an acoustic property of the exhaust gas, an acoustic property of the exhaust conduit, or a combination comprising at least one of the foregoing acoustic properties; applying an electrical signal to a piezoelectric patch, wherein the piezoelectric patch is secured to the exhaust conduit; and deforming the piezoelectric patch mechanically to modulate a sound emitted from the exhaust system.
摘要:
Disclosed herein is an adaptive head light assembly, comprising a parabolic reflector for housing a filament assembly; a lever arm having one end pivotably affixed to a bearing point of the parabolic reflector; an actuator in operative communication with the other end of the lever arm to actuate motion of the lever arm, wherein the actuator comprises a shape memory material adapted to change a shape orientation or modulus property upon receipt of an activation signal; and a spring in operative communication with the other end of the lever arm and adapted to provide a restoring force.