19 results about "Shape memory alloy actuators" patented technology

The present application belongs to the technical field of robot control, and particularly relates to an uncertainty and disturbance estimation control method for a shape memory alloy driver. The method of the present application controls the shape memory alloy driver by using a control signal as follows: the present application combines a shape memory alloy rate-dependent Prandtl-Ishlinskii model with an uncertainty and disturbance estimation control method to realize tracking control of the shape memory alloy driver, improve robust performance, and has a good application prospect.

A shape memory alloy SMA actuator comprises a first part 4 with a first surface 4f, a second part 20 moveable relative to the first part 4 across the first surface 4f, and one or more SMA elements 80a

The invention discloses a modularized edible mushroom square cabin rapid deployment device and a thermodynamic optimization system thereof, and relates to the field of edible mushroom industrial cultivation, and the modularized edible mushroom square cabin rapid deployment device comprises a phase change sandwich plate, a mortise and tenon joint-hydraulic connection mechanism and a topological optimization support skeleton; the topological optimization supporting framework forms a main body bearing framework of the square cabin; the phase change sandwich plate is laid and fixed on a frame formed by the topological optimization supporting framework to form an enclosure structure of the square cabin and is used for regulating and controlling a thermal environment in the cabin; the multiple phase change sandwich plates are in butt joint and locked through the mortise and tenon joint-hydraulic connecting mechanisms, and rapid airtight assembly of the cabin body module is formed. Through the synergistic effect of the outer-layer aluminum alloy, the middle gradient phase-change material layer and the inner-layer aerogel, intelligent adjustment of the temperature in the cabin is achieved, and the dynamic thermal bridge blocking system achieves dynamic thermal bridge blocking through linkage cooperation of a shape memory alloy actuator, a ceramic thermal insulation insertion piece and an infrared thermal imaging module. Accurate identification and dynamic blocking of a thermal bridge passage are realized.

A shape memory alloy (SMA) actuator includes a lever pivotable about a pivot axis between a first position and a second position, a mount coupled to the lever and radially offset from the pivot axis, and an actuator coupled to the lever and moveable between an extended position corresponding to the first position of the lever and a retracted position corresponding to the second position of the lever. The SMA actuator also includes a shape memory alloy (SMA) element connected to the mount. In response to heat being applied to the SMA element, the SMA element changes between an extended state and a contracted state. The lever is configured to pivot from the first position corresponding to the SMA element being in the contracted state to the second position corresponding to the SMA element being in the extended state.

This disclosure provides a self-locking structure for a focusing motor and a camera, comprising: a base; a carrier, the carrier being movably disposed on the base along an optical axis for supporting a lens; a locking member, the locking member being movably connected to the base and configured to move between a locked position and an unlocked position, wherein in the locked position the locking member abuts against and locks the carrier, and in the unlocked position the locking member releases the carrier, allowing the carrier to move along the optical axis; an elastic member, the elastic member being disposed on the base and configured to apply a force to the locking member, causing the locking member to always have a tendency to move towards the locked position; and a shape memory alloy actuator, the shape memory alloy actuator being connected to the locking member and configured to overcome the force of the elastic member when activated, driving the locking member to move to the unlocked position.

Shape memory alloy actuator assemblies are disclosed. An actuator assembly comprises a first part (2002), a first support means (2003) and a platform (2004). The first support means supports the platform on the first part. The platform is tiltable about a first axis and / or a second axis (2011, 2012) that are non-parallel and perpendicular to a main axis (2009) through the actuator assembly. The actuator assembly further comprises a second support means (2005) and a second part (2006). The second support means supports the second part on the platform such that the second part tilts with the platform. The actuator assembly further comprises a drive means (2007; Fig. 22) comprising four segments of shape memory alloy wire (20101, 20102, 20103, 20104). The four segments of shape memory alloy wire are connected between the second part and the first part of the actuator assembly. The first support means is configured to guide tilting of the platform about the first axis and / or the second axis and to constrain rotation of the platform about the main axis. The platform defines a first plane (2500; Fig. 25) that is tiltable and has a normal (2501; Fig. 25) such that tilting the platform tilts the normal away from the main axis. The second support means is configured to constrain tilting of the second part relative to the platform, to constrain lateral movement of the second part perpendicular to the normal, and to guide axial movement of the second part relative to the platform along the normal.

This invention relates to the field of automatic control and processing technology, specifically to an adaptive control method for crushing construction solid waste. The method includes real-time acquisition of particle size, rebar ratio, moisture content, strength, and feed rate via a multi-source sensor array; generation of operating condition vectors via a cross-modal fusion network; and training of a convolutional neural network to output rotor speed, cavity clearance, hydraulic pressure, screen aperture size, and shape memory alloy deformation. This application also relates to adaptive control equipment for crushing construction solid waste. The controller of this application synchronously drives a variable frequency motor, hydraulic cylinder, variable screen, and Ni-Ti shape memory alloy actuator, completing reversible geometric adjustment within 10 seconds. This enables rapid switching between coarse and fine crushing, incremental updates via online particle size detection and energy consumption metering feedback network, forming a perception-decision-execution closed loop. This significantly reduces energy consumption, substantially improves particle size qualification rate, extends liner life, reduces the need for manual intervention, enhances overall operational stability and intelligence, and reduces dust emissions.

This invention provides a building exterior wall panel with an integrated passive ventilation cavity, belonging to the technical field of building exterior wall panel technology, aiming to solve the problems of poor heat dissipation in summer and poor thermal insulation in winter of traditional exterior wall panels. The panel includes a panel body composed of an exterior decorative layer, an insulation core layer, and an inner lining layer; a ventilation cavity disposed between the exterior decorative layer and the insulation core layer and distributed along the height of the panel; and a thermally actuated switch assembly disposed at the air inlet or outlet of the ventilation cavity. This switch assembly utilizes a two-way shape memory alloy actuator to automatically open or close the ventilation opening according to the ambient temperature. In hot summer weather, the ventilation opening opens, using the thermal pressure effect to form a "cooling chimney" to remove heat; in cold winter weather, the ventilation opening closes, reducing heat loss and thus improving thermal insulation. This device can adapt to the external ambient temperature and passively adjust the wall performance to reduce building energy consumption.

Various examples relate to electrically actuated valves. Various examples relate to actuators for valves, e.g., shape memory alloy actuators or electromagnetic actuators (151) or piezoelectric actuators. Various examples relate to a modular concept in which a valve can be formed by attaching actuator components (601) to a housing. Various examples relate to another modular concept in which multiple valve blocks are capable of being fluidically coupled to one another, each valve block including one or more valves.

A shape memory alloy actuation apparatus comprises a support structure (2) and a movable element (10). A helical bearing arrangement (20) supporting the movable element on the support structure guides helical movement of the movable element with respect to the support structure around a helical axis (H). At least one shape memory alloy actuator wire (60) is connected between the support structure and the movable element in, or at an acute angle to, a plane normal to the helical axis, so as to drive rotation of the movable element around the helical axis which the helical bearing arrangement converts into said helical movement.

A shape memory alloy (SMA) actuator includes a lever pivotable about a pivot axis between a first position and a second position, a mount coupled to the lever and radially offset from the pivot axis, and an actuator coupled to the lever and moveable between an extended position corresponding to the first position of the lever and a retracted position corresponding to the second position of the lever. The SMA actuator also includes a shape memory alloy (SMA) element connected to the mount. In response to heat being applied to the SMA element, the SMA element changes between an extended state and a contracted state. The lever is configured to pivot from the first position corresponding to the SMA element being in the contracted state to the second position corresponding to the SMA element being in the extended state.

The invention discloses a shape memory alloy driver. The shape memory alloy driver comprises a fixing mechanism, a speed reducing mechanism, at least one first shape memory alloy wire, at least one second shape memory alloy wire and a motion conversion mechanism. The transmission ratio of the reducing mechanism is less than 1; the first shape memory alloy wire is partially wound on the input part of the speed reducing mechanism in the first direction, one end of the first shape memory alloy wire is connected to the input part of the speed reducing mechanism, and the other end of the first shape memory alloy wire is connected to the fixing mechanism; the second shape memory alloy wire is partially wound around the input part of the speed reducing mechanism in the second direction, one end of the second shape memory alloy wire is connected to the input part of the speed reducing mechanism, and the other end of the second shape memory alloy wire is connected to the fixing mechanism. The motion conversion mechanism is connected to an output shaft of the speed reducing mechanism. The shape memory alloy driver can drive an execution part to generate a large stroke, and then the application requirements of all fields for the large stroke are met.

A device comprising: an actuator body (52) movable along an axis between an extended position and a retracted position, wherein the actuator body (52) comprises the following: a flexible part (60) which is pre-tensioned in the extended position, wherein the flexible part (60) comprises a corrugated shape; a closure element interface (62); a circuit board connector interface (64); and wherein the flexible part (60), the locking element interface (62) and the switching plate connector interface (64) are designed as a single body structure; and a shape memory alloy actuator (74) coupled to a locking element (58) associated with the locking element interface (62), wherein the shape memory alloy actuator (74) moves the compliant part (60) into the retracted position in response to an electrical input, wherein the actuator body (52) further comprises a shape memory alloy connection interface (66), wherein the actuator body (52) is connected to an elongated shape memory alloy element via the shape memory alloy connection interface (66), which includes a first crimp interface, wherein the first crimp interface is associated with a first end (82) of the elongated shape memory alloy element, wherein the device includes a second crimp interface associated with a second end (84) of the elongated shape memory alloy element, wherein the actuator body (52) includes a first connector at the circuit board connector interface (64), wherein the second crimp interface is separate from the actuator body (52) and includes a second connector, wherein the device includes a switching plate (72) which can be connected to the actuator body (52) via the first connector and to the second crimp interface via the second connector, a closed electrical circuit is provided when the first connector and the second connector is connected to the switching plate (72).

This document describes an SMA actuator and related methods. One embodiment of the actuator includes: a base; a plurality of buckling arms; and at least a first shape memory alloy wire coupled to a pair of buckling arms among the plurality of buckling arms. Another embodiment of the actuator includes a base and at least one dual piezoelectric wafer actuator comprising a shape memory alloy material. The dual piezoelectric wafer actuator is attached to the base.

An actuator assembly (140) comprises first and second parts. A first axis (Z) is defined with reference to the second part. The actuator assembly (140) comprises shape-memory alloy wire (80) connected between the first and second parts for moving the first part relative to the second part in any of a set of directions that are at least partly perpendicular to the first axis (Z). The set of directions includes first and second directions. The actuator assembly (140) comprises a set of arms (170), each of which is connected between the first and second parts and extends partly around the first axis (Z). The set of arms (170) is configured to provide a biasing force that biases the first part towards a first position relative to the second part. The set of arms (170) has a first stiffness when the first part is moved away from the first position in the first direction and a second, lower stiffness when the first part is moved away from the first position in the second direction. At least one of the set of arms (170) comprises a portion (100) that is configured to decrease the first stiffness by a larger relative amount than the portion (100) decreases the second stiffness.

Shape memory alloy (SMA) systems suffer from system complexity, resulting in bulky systems that require a large footprint and significant height clearance. Furthermore, current systems have not been able to achieve a high Z-stroke range with a compact, low-profile footprint. [Solution] SMA actuators and related methods are described. One embodiment of the actuator includes a base, a plurality of bending arms, and at least a first shape memory alloy wire connected to a pair of the plurality of bending arms. Another embodiment of the actuator includes a base and at least one bimorph actuator comprising a shape memory alloy material. The bimorph actuator is mounted on the base.

SMA actuators and related methods are described. One embodiment of an actuator includes a base; a plurality of buckle arms; and at least a first shape memory alloy wire coupled with a pair of buckle arms of the plurality of buckle arms. Another embodiment of an actuator includes a base and at least one bimorph actuator including a shape memory alloy material. The bimorph actuator attached to the base.

An actuator assembly includes a resilient member configured to exert a bias force onto a plunger. The actuator assembly includes a shape memory alloy actuator configured to exert an actuation force onto the plunger when the shape memory alloy actuator is powered by an energy source. The actuator assembly includes contacts configured to oscillate between an actuated position and an unactuated position while power is being provided from the energy source to the switch. Oscillation of the contacts between the actuated position and the unactuated position causes the shape memory alloy actuator to expand and contract in a range of movement that limits movement of the shape memory alloy actuator when power is applied to the shape memory alloy actuator and that maintains the plunger in the open position to allow fluid to flow through a fluid port as long as power is being provided from the energy source.