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 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.

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.

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.

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 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 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.

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.