34 results about "Rotational deformation" patented technology

A binocular head mounted display includes a frame for wearing on a head of a user and right and left displays mounted to the frame for displaying right and left images to the user. The binocular head mounted display further includes at least one deformation sensor system disposed in or on the frame to measure rotational deformation of the frame about at least one rotational axis that causes the right and left displays to change alignment relative to each other.

A projection system is provided which includes a prolection lens and a spatial optical modulation device (SOM) for projecting an image in response to an inputted picture signal. A control unit enables the selection, via an image adjustment menu, of at least one of a rotational deformation adjustment in which a projected image is rotated and a keystone deformation adjustment in which the projected image is deformed into a rectangle, and the control unit applies a rotational deformation adjustment and a keystone deformation adjustment to the projected image based on an item selected in the image adjustment menu in response to a deformation indication inputted from a keys / indicators unit, so as to deform the projected image.

A real-time simulation method and system for large deformations is provided. Green's nonlinear strain tensor accurately models large deformations. Modal analysis based on a linear strain tensor has been shown to be suitable for real-time simulation, but is accurate only for moderately small deformations. In the present invention, the rotational component of an infinitesimal deformation is identified, and traditional linear modal analysis is extended to track that component. And the invention develops a procedure to integrate the small rotations occurring at the nodal points. An interesting feature of the formulation is that it can implement both position and orientation constraints in a straightforward manner. These constraints can be used to interactively manipulate the shape of a deformable solid by dragging / twisting a set of nodes. Experiments show that the technique runs in real-time even for a complex model, and that it can simulate large bending and / or twisting deformations with acceptable realism.

The invention relates to an alloy steel seamless steel tube for geological drilling and a machining method of the alloy steel seamless steel tube. The alloy steel seamless steel tube manufactured by the method disclosed by the invention is good in comprehensive properties, good in low-temperature impact toughness, and higher in rotational deformation resistance and abrasive resistance, wherein the yield strength of the alloy steel seamless steel tube is more than 1000MPa. After the cold-drawing technology, the thermal treatment technology and the straightening technology are adopted, the mechanical property, the rotational deformation resistance, the low-temperature impact toughness and the abrasive resistance of the seamless steel tube body can reach the standard.

The invention discloses a buckling constrained beam and column self-reset joint based on a steel-shape memory alloy (SMA) plate set element and an assembly method. According to the buckling constrained beam and column self-reset joint based on the steel-SMA plate set element and the assembly method, a flange part adopts the combined connection of a T-shaped plate, an SMA bone-shaped connecting plate and a beam flange plate with U-shaped holes and long circular holes so as to realize the improvement of the force transmission performance of the joint; the U-shaped holes and the long circular holes are formed in a beam flange so as to realize the relative sliding of a beam and the SMA bone-shaped connecting plate, deformation is enabled to be mainly concentrated upon the SMA bone-shaped connecting plate, so that it is ensured that main components are in an elastic state; and meanwhile, the energy-dissipating capacity of the joint is improved through friction, so that the problem that theenergy-dissipating characteristic and the self-reset characteristic of an existing joint are difficult to combine at the same time is solved; and in addition, the combined connection can effectively solve the local buckling problem caused by the SMA bone-shaped connecting plate due to superelasticity. A rectangular end plate is welded to a beam web, SMA disk springs are further arranged, on the one hand, the energy-dissipating capacity of the joint is enhanced, on the other hand, the rotational deformation capacity of the joint is improved, and the good self-reset characteristic of the combined connection is better reflected.

System and method of simulating large deformation and rotation of a structure in a finite element analysis used for improving structural design is disclosed. According to one aspect, a special purpose solid finite element is configured for simulating large deformations and / or rotations of a structure. The special purpose solid finite element comprises only corner nodes with each node having six degrees-of-freedom (DOF), three translational and three rotational. In other words, each node is configured to include translational deformation and rotation deformation, each of the translational and rotational deformation has three components corresponding to one of the six DOFs. According to another aspect, the special purpose solid element has a plurality of external edges. Each external edge has two ends, each end is located at one of the adjacent corner nodes. Additionally, translational deformation at mid-edge point of each external edge is implicitly embedded in the translational and rotational deformations of two adjacent corner nodes.

A vehicle fender panel mounting structure is provided in which good protection capability may be obtained for pedestrians, even when the break line portion between the hood and the fender panel is disposed offset in the vehicle width direction further inside than the vehicle body side structural member that is the corresponding mount for the fender panel. In a body in which a break line portion, of the front fender panel and a hood, is disposed offset further to the inside in the vehicle width direction than an apron upper member, an impact absorption bracket, made up from an upper bracket and a lower bracket, is disposed in a cantilever supported state, and by rotational deformation in a direction, an outside second angled portion contacts an upright wall portion, and after that time, bending deformation occurs in a successive manner, originating at a bent portion, from an inside second angled portion toward an outside second angled portion. A reaction force in the latter half of F-S characteristics may thereby be obtained.

The invention discloses an ice machine and a refrigerator provided with the same. The ice machine comprises an ice machine main body, an ice tray, a driving component and an anti-overflow retaining sheet, wherein the ice tray is rotatablely arranged in the ice machine main body, and ice cube trays are limited in the ice tray; the driving component is arranged at one end of the ice machine main body so as to drive the ice tray to rotate; and the anti-overflow retaining sheet is provided with a positioning mechanism and is pivotally arranged on one side of the ice tray through the positioning mechanism. According to the ice machine, the pivotally arranged anti-overflow retaining sheet can be closely attached to the ice tray so as to effectively prevent water in the ice cube trays from overflowing, and can also not affect the rotational deformation of the ice tray when the ice tray rotates to unload ice so as not to affect the automatic ice unloading process of the ice machine.

The invention discloses a method and a device for testing the structural collapse response of a ship hull girder under waves. The device comprises a buckling hinge and a ship hull model, wherein the ship hull model is divided into two ship hull sections from the middle part; the two ship hull sections are hinged together, thus being capable of making relative rotation along the vertical direction; the buckling hinge comprises an upper hinge piece, a lower hinge piece and two ship hull connecting plates; the upper hinge piece and the lower hinge piece are long-strip-shaped sheet metals, and the thickness and width of the upper hinge piece are smaller than those of the lower hinge piece; the upper hinge piece and the lower hinge piece are parallel to a waterline plane of the ship hull model, and the two ends of the upper hinge piece and the lower hinge piece are respectively and fixedly connected with the two ship hull connecting plates; the two ship hull connecting plates are respectively and fixedly connected with the two ship hull sections. The method adopts the device for testing the structural collapse response for testing; two wireless inclinometers are used for recording the longitudinal inclination motions of the ship hull sections in real time, so that the rotational deformation of the buckling hinge in the middle of a test model under the condition of different wave heights can be obtained.

The invention discloses a multi-edge safe fence with a pet door. The multi-edge safe fence comprises multiple fence edges which are connected end to end in order to form enclosed space. Joints where the fence edges are connected are provided with joint connecting parts. A first fence edge is a foldable door sill. A second fence edge is provided with a foldable pet door. The joint connecting parts comprise upper rotating parts, lower rotating parts, base stations and rotary shafts. The upper rotating parts and the lower rotating parts rotate coaxially. Interfaces among the upper rotating parts and the lower rotating parts are provided with engaged insections in order to form limiting structures. Threaded locking structures are arranged among the rotary shafts and the base stations. The multi-edge safe fence with the pet door has following beneficial effects: by arranging the foldable door sill and the special-purpose pet door, the multi-edge safe fence is much convenient; due to the fact that the multi-edge safe fence is provided with the threaded locking structures, rotational deformation does not occur when fences are stressed or collide such that children or pets do not suffer spatial compression; and the pet door is ingenuous in manufacture of the structure and relatively low in cost and brings convenience for pets to directly go in and out of the fence when the door sill is not opened.

The invention discloses a cutter for machining an eccentric groove, comprising a stand, a motor, a hollow main shaft and a belt pulley, wherein the hollow main shaft is arranged on the stand through a bearing seat and a bearing; the belt pulley is connected with the motor and the hollow main shaft; the hollow main shaft is also provided with a knife holding mechanism; and the stand is also provided with a material clamping mechanism. In the invention, a workpiece is fixed and a knife rotates, therefore the rotational deformation of the workpiece is prevented and machining quality is ensured; and different eccentric grooves can be machined by adjusting the position of the workpiece in an elastic clamping sleeve of the material clamping mechanism, the dislocation of the workpiece and a positioning rod of the material clamping mechanism in a radial direction and the position of the knife positioned on the knife holding mechanism. The invention has good universality, high machining efficiency, and the like.

The invention provides a precast pavement structure and a Z-shaped rubber insert applied to the structure. The pavement structure is formed by a plurality of T-shaped precast block pavement spliced and clamped together, and the Z-shaped rubber insert is arranged between the splicing faces of the adjacent T-shaped precast blocks in a clamping way. The rubber insert comprises an insert framework and rubber at the outer layer of the insert framework, the insert framework is provided with transverse reinforcing steel wires along two vertical bending directions starting from the corner center, and the framework is provided with a plurality of longitudinal reinforcing steel wires in the longitudinal direction. Under the action of the insert, the tiny rotational deformation of the T-shaped precast blocks under the action of wheels can be achieved so as to reduce the rotational displacement, so that the smoothness in the traveling of construction vehicles is improved, meanwhile, the stress-focusing effect at the internal corners of the precast blocks in the traveling process is weakened, and the integrity and the continuousness of the interlock effect of the pavement structure are achieved.

The invention relates to a description method for the structural deformation of a spaceborne microwave remote sensing instrument in the technical field of remote sensing instrument modeling methods. The method comprises the steps that 1 a fixed coordinate system of each individual component in an instrument is defined; 2 the rotational deformation parameters and the displacement deformation parameters of each reflecting surface and a feed source are defined; 3 by starting from the feed source, a coordinate system conversion matrix between adjacent optical path components is calculated according to the rotational deformation parameters and the displacement deformation parameters of the optical path components; and 4 the coordinate system conversion matrix is substituted into an optical pathmodel. According to the description method for the structural deformation of the spaceborne microwave remote sensing instrument, the structural deformation of the spaceborne microwave remote sensinginstrument including a planar reflecting surface, a rotating parabolic reflecting surface, a rotating hyperbolic reflecting surface and other components can be described with a minimum of deformationparameters, which helps subsequent optical path modeling of the spaceborne microwave remote sensing instruments with structural deformation.

A flow regulator system includes a flow regulator placed within a fluid flow path to maintain fluid flow therethrough at a desired flow rate. The flow regulator includes a flow washer having an orifice therethrough and a regulator body that receives the flow washer. At fluid pressures between a first fluid pressure and a second fluid pressure, the flow washer rotationally deforms to decrease or increase the size of the orifice, thereby maintaining the desired flow rate. When fluid pressure is greater than or equal to the second fluid pressure, the flow washer contacts a portion of the regulator body to prevent further rotational deformation of the flow washer. In addition, the flow washer radially compresses or expands to increase or decrease the size of the orifice, thereby maintaining the desired flow rate.

The invention relates to a movable press machine. The movable press machine comprises a movable framework and a laminating part, wherein the movable framework comprises a base; the base is connected with base frames; the base frames are connected with first movable rods; the first movable rods are connected with second movable rods; the first movable rods are connected with the second movable rods through springs; the second movable rods are connected with connecting rods of first hydraulic oil cylinders; a press table is arranged between the first hydraulic oil cylinders; the laminating part comprises a crankshaft; a flywheel is arranged on the crankshaft; the crankshaft is supported by second connecting rods of second hydraulic oil cylinders. The hydraulic oil cylinders are supported by adjusting the outside, and the crankshaft can work at an appropriate height. The press machine framework is set with a combined structure, and rotational deformation can be realized under the driving actions of the hydraulic oil cylinders to adjust different heights and width, so that the machining requirements of various workpieces are met, the application range is expanded greatly, and the use efficiency of the press machine is increased.

The invention discloses an electric automobile and a motor control system. The motor control system comprises a driving plate, a DC / DC converter, a rotational deformation unit, and a protection circuit, wherein the driving plate is connected with a motor to drive the motor; the DC / DC converter converts high voltage direct currents into low voltage direct currents, and the output terminal of the DC / DC converter is connected with the driving plate so as to supply electricity for the driving plate; the rotational deformation unit measures an angular position of the motor; the protection circuit is connected between the rotational deformation unit and the output terminal of the DC / DC converter, so that the DC / DC converter can supply electricity for the rotational deformation unit through the protection circuit; when the rotational deformation unit is failed, the protection circuit performs current limiting treatment to prevent the DC / DC converter from overcurrent protection so as to prevent the driving plate from being power off, so that when the rotational deformation unit is failed, the DC / DC converter is guaranteed to still supply electricity for the driving plate, and the driving plate normally works, potential safety hazards caused by that the motor is instantaneously out of control can be avoided, and a safe driving experience can be provided for users.

The invention discloses a refrigerator. The refrigerator comprises a storage chamber (1a) and a hanger (2); the storage chamber (1a) is provided with an inner wall(30); the hanger (2) comprises at least two installation parts (60) and at least one hanging part (11), and further comprises a supporting part (20a, 20b), wherein the installation parts (60) are used for being fixed to the inner wall (30), the hanging parts (11) are used for hanging objects, and gaps are formed between the hanging parts (11) and the inner wall (30); the supporting part (20a, 20b) is fixed to the installation parts (60), is in the direction perpendicular to the inner wall (30), is located between the inner wall (30) and the hanging parts (11), is adjacent to the inner wall (30) or is attached to the inner wall (30). According to the refrigerator, the hanging parts of the hanger are not liable to suffer from rotational deformation, and therefore the structural strength can be enhanced.

The invention discloses a finite element analysis method for the dynamic response of a plate shell structure with large rotational deformation, and belongs to the field of calculating nonlinear structural dynamics. The method comprises the following steps: 1. Establishing a geometric model of the plate and shell structure in computer-aided design software, and then importing it into computer-aided engineering software for mesh division; 2. Establishing a plate and shell element analysis model that takes into account the effect of large rotation deformation ;3. Introduce the time integration algorithm and iterative technology to establish the calculation and analysis model for the dynamic response analysis of the plate and shell structure; 4. Compile the finite element analysis program; 5. Configure the computing environment to calculate the dynamic response of the plate and shell structure. The invention provides an effective calculation and analysis tool for the calculation of the dynamic response of the plate shell structure involving large rotational deformation. For the structural system without external force, this method can not only conserve the structural energy, but also conserve the structural momentum, which makes up for the shortcomings of the existing analysis techniques.

The invention discloses a cutter for machining an eccentric groove, comprising a stand, a motor, a hollow main shaft and a belt pulley, wherein the hollow main shaft is arranged on the stand through a bearing seat and a bearing; the belt pulley is connected with the motor and the hollow main shaft; the hollow main shaft is also provided with a knife holding mechanism; and the stand is also provided with a material clamping mechanism. In the invention, a workpiece is fixed and a knife rotates, therefore the rotational deformation of the workpiece is prevented and machining quality is ensured; and different eccentric grooves can be machined by adjusting the position of the workpiece in an elastic clamping sleeve of the material clamping mechanism, the dislocation of the workpiece and a positioning rod of the material clamping mechanism in a radial direction and the position of the knife positioned on the knife holding mechanism. The invention has good universality, high machining efficiency, and the like.