Topic
Hinge joint
About: Hinge joint is a research topic. Over the lifetime, 1311 publications have been published within this topic receiving 8680 citations. The topic is also known as: ginglymus.
Papers published on a yearly basis
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Papers
TL;DR: Quantitative comparisons between model and experiment indicate that the model reproduces the kinematic, kinetic, and muscle-coordination patterns evident when humans jump to their maximum achievable heights.
Abstract: A three-dimensional model of the human body is used to simulate a maximal vertical jump. The body is modeled as a 10-segment, 23 degree-of-freedom (dof), mechanical linkage, actuated by 54 muscles. Six generalized coordinates describe the position and orientation of the pelvis relative to the ground; the remaining nine segments branch in an open chain from the pelvis. The head, arms, and torso (HAT) are modeled as a single rigid body. The HAT articulates with the pelvis via a 3 dof ball-and-socket joint. Each hip is modeled as a 3 dof ball-and-socket joint, and each knee is modeled as a 1 dof hinge joint. Each foot is represented by a hindfoot and toes segment. The hindfoot articulates with the shank via a 2 dof universal joint, and the toes articulate with the hindfoot via a 1 dof hinge joint. Interaction of the feet with the ground is modeled using a series of spring-damper units placed under the sole of each foot. The path of each muscle is represented by either a series of straight lines or a combination of straight lines and space curves. Each actuator is modeled as a three-element, Hill-type muscle in series with tendon. A first-order process is assumed to model muscle excitation-contraction dynamics. Dynamic optimization theory is used to calculate the pattern of muscle excitations that produces a maximal vertical jump. Quantitative comparisons between model and experiment indicate that the model reproduces the kinematic, kinetic, and muscle-coordination patterns evident when humans jump to their maximum achievable heights.
645 citations
Journal Article•
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TL;DR: The human body is a complicated machine whose movements involve many different joints, operated by a great many muscles as discussed by the authors, and it is easy to get bogged down in detail when thinking about walking and running from a mathematical point of view.
Abstract: The human body is a complicated machine whose movements involve many different joints, operated by a great many muscles. For that reason it is easy to get bogged down in detail when thinking about walking and running from a mathematical point of view. Any position of the human body (or of any other jointed mechanism) can be described by giving the angles of joints. The number of angles needed for an unambiguous description is the number of degrees of freedom of the mechanism. For example, the position of a hinge joint is described by just one angle: a hinge allows only one degree of freedom. The human knee is a hinge. The ankle, however, allows rotation about two axes – you can tilt your foot toes up or toes down, and you can also rock it sideways so that the sole faces inwards towards the other foot – so it gives two degrees of freedom. The hip is a ball and socket joint allowing rotation about any axis through the centre of the ball, but any position can be described by just three angles (measured, for example, in three planes at right angles to each other), so it allows three degrees of freedom. In total, there are six degrees of freedom in each leg, making twelve in all, and suggesting that we need twelve equations of motion to describe walking. If we took account of the flexibility of the foot and the movements of the arms, we would need more.
440 citations
TL;DR: In this paper, the linearized frequency-domain analysis of wave radiation and diffraction by a three-dimensional body in a fixed mean position is extended to a variety of deformable body motions.
373 citations
Patent•
12 Oct 1979
TL;DR: In this paper, a combined casing and operational support for a pocket calculator, comprising a rectangular bottom and a rectangular cover connected with the bottom through a hinge joint and including a first part close to the hinge joint, and a second part having a greater length than the first part and being connected therewith through a further hinge joint was presented.
Abstract: A combined casing and operational support for a pocket calculator, comprising a rectangular bottom and a rectangular cover connected with the bottom through a hinge joint and including a first part close to the hinge joint, and a second part having a greater length than the first part and being connected therewith through a further hinge joint. By turning the two parts of the cover in the same direction in the two hinge joints, the casing may be brought into a raised operative position, in which the first part of the cover projects below the bottom, whereas the side of the second part of the cover opposite said further hinge joint is connected with the bottom by mutually cooperating interlocking means comprising a pin on the cover part and a cut-out in the bottom.
204 citations
Patent•
19 May 1998
TL;DR: In this article, the authors describe a device comprising an osteosynthetic implant or implant part and at least a joint connected to the implant or the implant part by means of a connecting element.
Abstract: The invention relates to a device comprising an osteosynthetic implant or implant part and at least a joint (10) connected to the implant or the implant part. Each joint (10) comprises at least one flat disc or annular pivoting element (4; 16) and each pivoting element (4; 16) includes two flat rod-shaped connecting elements (5; 15) placed on an axis located outside the outer periphery of the pivoting element (4; 16) and forming the axes of rotation. A pivoting element (4; 16) is pivotally connected to the implant or the implant part by means of a connecting element (5; 15). The joint (10) can be used to receive a bone fixing element (1; 19) depending on its embodiment.
194 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2022 | 3 |
| 2021 | 16 |
| 2020 | 39 |
| 2019 | 75 |
| 2018 | 86 |
| 2017 | 64 |