54 results about "Joint load" patented technology

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.

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 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 advantageously allow for prediction of novel motion.

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.

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.

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 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.

An implant comprising 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.

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.

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.