54 results about "Joint load" patented technology

An apparatus for deploying an underwater pipe string includes a mast, an articulated table, a stinger, and a pipe erector. The mast is affixed to the articulated table and extends above the articulated table. The stinger is affixed to the articulated table and depends below the articulated table. The pipe erector is connected to the mast for loading pipe joints up to the mast. A pipe joint loaded in the mast is welded to the pipe string, which depends from the articulated table and through the stinger toward a seabed. The stationary table is articulated for tilting of the table, the mast, and the stinger azimuthally and angularly for a preferred direction and lay angle of the pipe string being deployed.

Various methods for treating a joint are disclosed herein. According to one method, a joint is surgically treated by performing a surgical repair treatment on tissue within the joint capsule; implanting a load reducing device at the joint and entirely outside of the joint capsule to reduce load transmitted by the treated tissue to allow for the tissue within the joint capsule to heal; and partially unloading the joint during healing of the surgical repair site.

A method for estimating joint load at a joint of a segment. The method comprises the steps of receiving kinematic data, determining a modified acceleration using at least the kinematic data, estimating a joint load using at least the modified acceleration; and determining simulated kinematic data for the segment using at least the joint load. The present invention thus addresses the problems with conventional inverse dynamics analysis by providing a forward dynamics solution for estimation of joint loads that is stable, guaranteed to converge, computationally efficient, and does not require acceleration computations. According to one embodiment of the present invention, a joint load is estimated recursively.

A method for estimating joint load at a joint of a segment. The method comprises the steps of receiving kinematic data, determining a modified acceleration using at least the kinematic data, estimating a joint load using at least the modified acceleration; and determining simulated kinematic data for the segment using at least the joint load. The present invention thus addresses the problems with conventional inverse dynamics analysis by providing a forward dynamics solution for estimation of joint loads that is stable, guaranteed to converge, computationally efficient, and does not require acceleration computations. According to one embodiment, a joint load is estimated using an approach of closed form dynamics.

A method for estimating joint load at a joint of a segment. The method comprises the steps of receiving kinematic data, determining a modified acceleration using at least the kinematic data, estimating a joint load using at least the modified acceleration; and determining simulated kinematic data for the segment using at least the joint load. The present disclosure thus addresses the problems with conventional inverse dynamics analysis by providing a forward dynamics solution for estimation of joint loads that is stable, guaranteed to converge, computationally efficient, and does not require acceleration computations. According to one embodiment, a joint load is estimated using an approach of closed form dynamics.

A method for estimating joint load at a joint of a segment. The method comprises the steps of receiving kinematic data, determining a modified acceleration using at least the kinematic data, estimating a joint load using at least the modified acceleration; and determining simulated kinematic data for the segment using at least the joint load. The method addresses the problems with conventional inverse dynamics analysis by providing a forward dynamics solution for estimation of joint loads that is stable, guaranteed to converge, computationally efficient, and does not require acceleration computations. According to one embodiment, a joint load is estimated recursively.

A method of predicting kinematic data for a segment. The method comprises the steps of determining a modified acceleration using at least original kinematic data, estimating a joint load for a joint of the segment by using at least the modified acceleration, and predicting kinematic data for the segment based on one or more modified parameters. Therefore, various embodiments of the present invention advantageously allows for prediction of novel motion.

Load transferring systems and related methods for transferring load in a joint are provided. The load transferring system may include two bases configured to couple to bones defining a joint and a spring configured to couple to the bases. The spring may be configured to exert a tensile force between the bases during flexion of the joint. The load transferring system may be employed to treat symptoms associated with osteoarthritis of the lateral compartment of the knee joint. Thus, the bases may respectively couple to the femur and tibia. The spring may exert tensile force therebetween during flexion of the knee joint so as to unload the lateral compartment of the knee joint by transferring load from the lateral compartment of the knee joint to the medial compartment of the knee joint.

The invention provides a method for measuring towercrane crane jib structural distortion and stress of a trolley-jib amplitude type tower crane, which is based on the finite element method. The measuring method comprises the following steps: firstly, determining main parameters of the tower crane steel structure in the form of man-machine interaction, then calculating the nodes, the coordinates of finite element joints, the number of the finite elements, space direction cosine, and the dead weight of the finite element, determining the weight of a luffing mechanism, determining the equivalent joint load, generating the equation to form a total stiffness matrix, accurately calculating the element stress of spacetruss based on the finite element method, considering the effect of the deformation and stress of truss due to temperature change and reaching the aim of computer-aided tower crane design, thus greatly reducing the design cost.

The invention relates to a program-controlled milling and drilling machine comprising a machine column, a machining unit comprising a milling head and being movable along at least one coordinate axis at the front of the machine column, a machine bed disposed in front of the machine column, a work carrier movable on the machine bed along another coordinate axis, and a pallet exchanger arranged at the free end portion of the machine bed, having two spaced apart pallet holders and a rotating and lifting mechanism on a joint load-bearing structure. According to the invention, the load-bearing structure of the pallet exchanger is laterally arranged next to the machine bed and has a dimensionally stable and sturdy transverse arm extending across the machine bed and supporting the rotating mechanism, the lifting mechanism in the load-bearing structure laterally arranged next to the machine bed being arranged in a manner so as to protect against dirt by a splashboard.

A method of predicting kinematic data for a segment. The method comprises the steps of determining a modified acceleration using at least original kinematic data, estimating a joint load for a joint of the segment by using at least the modified acceleration, and predicting kinematic data for the segment based on one or more modified parameters. Therefore, various embodiments advantageously allow for prediction of novel motion.

The invention relates to a residential structure of multi-storey cold-formed steel composite building, which comprises a plurality of wall body units, roof units and joist guide rail which is connected with the wall body and the roof respectively, wherein, the residential structure of multi-storey cold-formed steel composite building also comprises square tubular columns arranged vertically at two ends of the wall body units, the roof units comprise a flat plate part and a joint embedded in the flat plate part, the materials of the flat plate part are light weight building boards, and the wall body units are provided with strengthened section columns for bearing the joint load of the roof units. The invention is applicable to constructing multi-storey buildings.

The invention provides a calculation method of tunnel lining design. The calculation method comprises the following steps: according to displacement continuous condition between a lining and a loosing circle and a water flow continuity condition among the lining, the loosing circle and an integral rock mass, calculating mutual acting force between lining concrete and the surrounding rock loosing circle during no crack; calculating the hoop stress of the inner surface of the lining concrete to calculate lining crack load and judge whether the lining concrete is cracked or not; calculating the mutual acting force between the lining and the surrounding rock loosing circle; judging whether the lining and the surrounding rock are separated or not, and determining an optimal reinforcement scheme of tunnel lining concrete. On the basis of a pervious lining theory and a lining surrounding rock conditional joint load mechanism, influence on a lining structure by the surrounding rock loosing circle is considered, a three-layer wall thickness cylinder model formed by the lining, the loosing circle and the integral rock mass is adopted to carry out tunnel lining design, a lining reinforcement scheme, and corresponding reinforcing steel bar stress on the crack, maximum crack width between the cracks and unit tube length seepage flow can be obtained.

A point-contact pin-type force sensor relates to the technology field of sensors of measuring mechanical-structure joint loads. Three drum type bosses are successively arranged on a pin body in an axial direction, the pin body between two adjacent drum type bosses is a sensing part, a lead laying groove is mounted on a peripheral surface of every drum type boss and the whole three lead laying grooves are collinear along the pin-body axial direction. Four resistance strain gages are uniformly disposed on a peripheral surface of every sensing part, every resistance strain gage is connected with a lead; the lead passes by the lead laying groove, penetrates a lead wire hole arranged in a pin base, and is connected with a lead fixed terminal; and the lead fixed terminal is mounted on a peripheral surface of the pin base. The force sensor provided by the invention achieves purposes of good reproducibility of measuring results, high precision, large-load measuring applicability and high reliability.

An implant having at least three components, namely, a solid hydrogel, a porous hydrogel adjacent to or surrounding the solid hydrogel (together considered “the hydrogel”), and a porous rigid base. The solid hydrogel and porous rigid base carry joint load, and the porous hydrogel layer and the porous rigid base allow for cellular migration into and around the implant. The invention is also a novel method of manufacturing the implant, a novel method of implanting the implant, and a method of treating, repairing or replacing biological tissue, more preferably musculoskeletal tissue, with the implant.

A substrate removal apparatus capable of cutting a plurality of aligned, precision slots in a variety of surfaces, such as concrete, asphalt pavement, and other composite substrates, utilizes high-pressure liquid cutting devices. Slots may be cut in pavement for such applications as dowel bar retrofitting for joint load transfer restoration. An apparatus according to one embodiment includes a support frame, a carriage carried by the support frame, and cutting devices coupled to the carriage. The apparatus is configured so that the carriage is movable along a generally horizontal path of travel and a generally vertical path of travel.

The invention belongs to the field of aviation fatigue damage tolerance tests, in particular to a loading design method for a high vertical fin vertical load of a full-scale fatigue test. Firstly, a full-aircraft finite element model is established, according to the size and magnitude of the vertical fin vertical load, the loading form of the load is determined, the loading form is determined, full-aircraft loads are calculated, and joint loads are converted to an adjacent fuselage frame according to the equivalence principle, finally, the durability of connection key parts of the vertical finand the fuselage is analyzed and calculated. By adopting the method, the problems that the loading system of the vertical fin vertical load is complex and difficult to design are solved.

The invention discloses a six-freedom-degree manipulator. The six-freedom-degree manipulator is composed of a base part, a large and medium arm part, and a wrist part, wherein, the base part is rotatably connected with the large and medium arm part through a thrust roller bearing, and the large and medium arm part is connected with the wrist part through bolts; the rotation relationship between large and medium arms and a base is the first degree of freedom, the rotation relationship between the large arm and a round disc is the second degree of freedom, the rotation relationship between the medium arm and the large arm is the third degree of freedom, and the rotation relationship between the wrist and the medium arm is the fourth degree of freedom; and the rotation relationship between amotor connecting piece and a motor upper bracket is the fifth degree of freedom, and the rotation relationship between a tail end flange and a bevel gear connecting piece is the sixth degree of freedom. The large and medium arms are each of a hollow carbon fiber structure, in the case of ensuring the strength, the weight is greatly reduced, an encoder is mounted on a joint shaft, the closed-loop control is conducted so as to ensure the accuracy of motion, and the manipulator has the characteristics that the lower joint load can be reduced, the cantilever inertia is reduced, and the operationalstability is improved.

The invention belongs to the technical field of structure static test, and specifically relates to a high-magnitude axial compression and binding joint load realization device. A combined test piece, a bearing steel box and a test platform are sequentially connected by bolts from top to bottom, and the test platform is fixed on the ground. A loading transition tool is connected to an engine installation site above a frame. Loading beams are connected above the loading transition tool. Two pull rods are respectively connected to the long holes at the two ends of each loading beam. Each pull rod is connected with a loading frame after passing through a first-stage engine frame. Load applying devices are connected below the loading beams. The load applying devices are sequentially connected downward with fixed square plates and a fixed ring by bolts. First, the fixed ring and the test platform are connected by a T slot; second, the fixed square plates, the fixed ring and the T slot of the test platform are connected by multiple bolts in a three-to-one mode; and finally, through holes are arranged in the corresponding positions of the square plates above the already-made bearing point of the fixed ring to connect the fixed ring and the fixed square plate.

The invention provides a quadruped robot hydraulic power system with double pump sources connected in parallel for oil supply. The system comprises a high-pressure pump, an engine, a medium-pressure pump, a high-pressure oil path servo valve, a medium-pressure oil path servo valve and a hydraulic cylinder, wherein the engine is respectively connected with the high-pressure pump and the medium-pressure pump; the high-pressure oil path servo valve and the medium-pressure oil path servo valve are connected to the hydraulic cylinder in parallel; an oil outlet of the high-pressure pump is connectedwith an oil inlet of the high-pressure oil path servo valve to form a high-pressure oil path; an oil outlet of the medium-pressure pump is connected with an oil inlet of the medium-pressure oil pathservo valve to form a medium-pressure oil path; and the output pressure provided by the high-pressure pump is greater than the output pressure provided by the medium-pressure pump. According to the system, hydraulic oil sources with two pressures can be simultaneously provided for joint hydraulic cylinders of a quadruped robot to select, so that the joint load characteristics in the walking process of the quadruped robot are better matched, and the efficiency of the quadruped robot hydraulic power system is remarkably improved.

The invention discloses a fatigue test design method of an aircraft engine suspension joint and belongs to the technical field of aircraft structural part fatigue tests. The method comprises the following steps of: firstly, obtaining suspension joint load under respective load conditions; secondly, distributing the suspension joint load according to a rigidity ratio of rims on the suspension joint to simplify the structural form of a test piece; during a test, loading the suspension joint by using a two-way independent loading way; monitoring the state of the to-be-checked part of the suspension joint to acquire experimental data; and finally, comparing the acquired experimental data and a theoretical analysis result and correcting a calculation model and a calculation result. The fatigue test design method simplifies the test piece according to a law of load distribution according to stiffness, monitors the test piece and corrects the calculation model and the calculation result by using a smart coating and a strain gauge, achieves a test checking and monitoring purpose, and simplifies a test scale and reduces test cost.

A method is provided for the automatic determination of at least one joint load information item concerning a joint of a patient, wherein at least one image data set of the loaded joint is recorded by an imaging apparatus. Several image data sets of the joint, of which at least one is three-dimensional, are recorded in each case for different loading states by the imaging apparatus. By combined evaluation of the image data sets, the at least one joint load information item is determined.

The invention provides a computing method for accurately analyzing the internal pressure strength of a grid reinforced cylindrical shell. The computing method comprises the following steps: 1) performing 'flattening' treatment on rigidity of ribs in the grid reinforced cylindrical shell; 2) calculating the tension and compression stiffness of the ribs according to the laminated shell theory; 3) obtaining a rib / skin mass ratio and longitudinal and horizontal equivalent thicknesses of the grid reinforced cylindrical sell according to a tension and compression stiffness computation formula; and 4) computing the internal pressure strength of the grid reinforced cylindrical sell. The computing method provided by the invention is suitable for all kinds of grid form structures, and is used for designing and computing the internal pressure strength under the joint load action of pure internal pressure, axial pressure, bending moment and internal pressure, thereby obtaining ultimate bearing capacity; and the method is more intuitive and clear as well as simple and convenient, and is favorable for improving the bearing capacity of a grid reinforced structure, reducing the weight of the structure and realizing accurate and fast design of strength.

The invention relates to a floating state controller of a joint-load device for land and sea connection transportation and a working method thereof, belonging to the technical field of ship and sea engineering. The floating state controller comprises a tide-level height measurement unit, a relative level position measurement unit, a relative height measurement unit, a draught measurement unit and a receiving and controlling unit, wherein information, acquired by a sensor, of all measurement units is transmitted to a receiving end of the receiving and controlling unit, and the receiving and controlling unit carries out data transmission with a loaded computer software system. Measurement data of each measurement unit are taken as analysis and calculation data for connecting a floating body loader, regulating the floating state and ensuring structure strength. The floating state controller improves safety and efficiency of land-sea transportation of transportation products and offshore lifting and submerging operation of a connection floating body, can be applied to a slideway displacement system or a rail displacement system, has the advantages of simple structure, strong engineering applicability, safety and reliability, convenience for maintaining, does not change the current work environment and influences shipyard production processes and flows.

The invention discloses a low-speed angular contact ball bearing friction moment measuring device and a loading measuring method and relates to bearing radial load, axial load, moment load, joint loadloading and friction moment measurement. The device is formed by a pedestal, a driving system, a radial load loading system, an axial load loading system, a moment load loading system and a frictionmoment measuring system. For a problem that other components interfere a loading load during an existing angular contact ball bearing friction measuring device load loading process, a closed-loop feedback control system formed by a six-dimensional force sensor, the radial load loading system, the axial load loading system and the moment load loading system is used to eliminate an interference. Inthe invention, a friction moment measurement problem under the continuous high-precision loading of an angular contact ball bearing joint load is solved and friction moment measurement is accurate.

The invention relates to a robot multi-joint self-adaptation compensation method based on a perceptron model and a stabilizing device. The method comprises the steps that firstly, based on a robot inertial sensor and a gait generator, error data are obtained; secondly, the error data are input into the pre-built perceptron model, the perceptron model updates a network weighting parameter based onan associative learning strategy, and compensation value is calculated and output; and thirdly, based on the compensation value, a robot is subjected to motion compensation, and the compensation valueoutput by the perceptron model comprises hip joint compensation value, knee joint compensation value and ankle joint compensation joint. Compared with the prior art, the associative learning strategyis adopted, the network weighting parameter is updated through a supervisory Hebb learning rule, robustness is improved, self-adaptation control is achieved, compensation amount is dispersed to all joints, such as the ankle joint, the knee joint and the hip joint, of a leg, the joint loads are reduced, and the service life of a robot is prolonged.

A joint load measurement method based on strain identification multi-joint comprises the following steps: firstly disassembling butted structural parts, then selecting one of the structural parts forcalibration, selecting a first joint A1 to be loaded step by step in an x direction for a total load of 8 levels, recording a load F1 and values of each of strain epsiloni1s, performing linear fittingto obtain a relationship line between the load F1 and each of the strain epsiloni1s to obtain 3m slope ki1s, calibrating each of the joints in any direction in the same way to form a transfer coefficient matrix between strain and load, performing linear superposition on the transfer coefficient matrix, identifying the load of a plurality of connecting hinge points among different structural members, especially the connecting load of aircraft wing joints, by measuring the strain, and inverting the joint load with an over-constrained system by measuring and calibrating the transfer relationshipbetween the strain and joint load, so as to achieve the measurement of the joint load inside the structure, thereby effectively overcoming the lack of load measured by the force sensor, and measuringthe joint load is of great significance for structural design optimization.