Knee joint prototype based on cam mechanism – design and video analysis

Olinski, Michał

doi:10.1080/10255842.2022.2132819

Cited by 4 publications

(5 citation statements)

References 43 publications

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“…Although the medial condyle exhibits smaller rotation and sliding during the process of knee flexion than the lateral condyle, 9,10 the NCG mechanism better fits the ICR trajectory of the medial femoral condyle than SG mechanism. 14,15 Currently, most studies mainly analyze the influence of the brace mechanism on the final sliding. The results of this study showed that as the knee flexion angle increases, the brace sliding on the thigh and shank gradually increases.…”

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

“…9 However, studies have shown that the noncircular gear (NCG) mechanism better fits the ICR of the medial condyle compared to SG mechanism. 14,15 While some researchers have examined the matching of mechanism to the ICR of the lateral and medial condyles, few studies have specifically explored the effect of different mechanisms on brace sliding. Regalbuto et al 5 designed four mechanisms and analyzed changes in contact force between the brace and lower limb surface, but they did not consider the brace sliding.…”

Section: Introductionmentioning

confidence: 99%

“…9 However, studies have shown that the non-circular gear (NCG) mechanism better fits the ICR of the medial condyle compared to SG mechanism. 14,15…”

Section: Introductionmentioning

confidence: 99%

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The effect of different mechanism combinations on sliding between brace and lower limb during walking and leg-raising

Yan,

Gong,

Cao

et al. 2024

Proc Inst Mech Eng H

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Knee braces are commonly used to support the knee joint and improve function. However, brace sliding caused by the misalignment between brace and knee during motion is a common problem, which reduces the therapeutic effect and leads to brace abandonment. To investigate the effect of mechanism combinations on sliding, an experimental brace was designed to isolate the mechanism as the sole variable. Ten healthy participants were recruited, each of whom worn four combinations of lateral/medial mechanisms: lateral and medial single-axis (SA), lateral super gear (SG) and medial non-circular gear (NCG), lateral four-bar linkage (FL) and medial SG, and lateral FL and medial NCG. The knee flexion angle was collected using inertial measurement units, and brace sliding was measured by 3D motion capture system. All combinations had significant changes in peak sliding of thigh and shank compared to the SA combination ( p < 0.05), but lateral FL and medial NCG combination had the lowest peak and final sliding during walking and leg-raising, with significant reductions of 40.7 and 85.3% in peak sliding of thigh, and significant reductions of 56.3 and 72.0% in peak sliding of shank, respectively ( p < 0.05). Moreover, the mechanism combination did not significantly impact the knee range of motion ( p > 0.05). The mechanism combination that fit the instantaneous center of rotation of lateral/medial condyle of knee joint demonstrates a significant reduction in brace sliding. Additionally, the peak sliding during motion is significantly higher than the final sliding.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…9 However, studies have shown that the non-circular gear (NCG) mechanism better fits the ICR of the medial condyle compared to SG mechanism. 14,15…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The effect of different mechanism combinations on sliding between brace and lower limb during walking and leg-raising

Yan,

Gong,

Cao

et al. 2024

Proc Inst Mech Eng H

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“…Examples of these are presented in the following papers [22][23][24][25]. Another group are CPM systems where the actuator is directly coupled to the knee flexion mechanism (in the flexion axis) [26,27]. In these studies, the authors describe solutions that are usually offered by rental companies that specialize in rehabilitation equipment and operate in Poland.…”

Section: State Of the Art Of Scientific Research In The Field Of Cpm ...mentioning

confidence: 99%

The Use of Generative Design Methods to Reduce the Parameters of an Actuator Used in the Positioning System of a Continuous Passive Motion (CPM) Device

Trochimczuk,

Zdobytskyi,

Borkowski

2024

Applied Sciences

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This paper presents the results of a computer optimising a multibody system using Generative Design methods to select a lower-cost actuator that meets process requirements with its parameters. Optimisation was performed to reduce the mass of the motion apparatus components of the author’s CPM device, used for the rehabilitation of patients after knee arthroscopy and total or partial knee replacement. An analysis of the kinematics and dynamics of the multibody mechanism, based on a virtual model, was carried out to identify the requirements for selecting an actuator. The main components of the motion apparatus mechanism were subjected to a series of numerical analyses using selected CAD/CAE tools, with the assumed criterion of varying material and component shapes to ensure that the required strength and accuracy of the mechanism links were maintained, assuming the same functionality. The results of the numerical analyses will be the basis for the selection of the optimum solution, for which a new, lower-cost actuator will be selected.

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An Experimental Characterisation of Developed Knee Joint Mechanism Prototypes

Olinski

2024

Mechanisms and Machine Science

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Knee joint prototype based on cam mechanism – design and video analysis

Cited by 4 publications

References 43 publications

The effect of different mechanism combinations on sliding between brace and lower limb during walking and leg-raising

The effect of different mechanism combinations on sliding between brace and lower limb during walking and leg-raising

The Use of Generative Design Methods to Reduce the Parameters of an Actuator Used in the Positioning System of a Continuous Passive Motion (CPM) Device

An Experimental Characterisation of Developed Knee Joint Mechanism Prototypes

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