Kinematic Reliability Analysis of Planar Metamorphic Mechanism with Multi-source Uncertainties

doi:10.3901/jme.2021.17.064

Cited by 3 publications

(1 citation statement)

References 8 publications

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“…YANG et al [24] proposed a general structural design method for a planar metamorphic mechanisms based on the structural synthesis matrix. WANG and KONG et al [25] established a full-configuration kinematic reliability model of a planar five-bar metamorphic mechanism considering multi-source uncertainties such as joint clearances, manufacturing tolerances of links, thermal deformations of links and joints.…”

Section: Introductionmentioning

confidence: 99%

Reliability Optimization Design of Constrained Metamorphic Mechanism Based on the Augmented Assur Groups

YANG,

ZHANG,

SUN

et al. 2024

Preprint

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In order to obtain stable and reliable configuration transformation ability, reliability optimization design is regarded as an effective way to reduce the probability of kinematic function failure for the constrained metamorphic mechanism. Based on the structural composition principle of multi-configuration source metamorphic mechanism that can operate in an under-actuated state, the modularized calculation methods are established for the force analysis of augmented Assur groups including metamorphic kinematic joints. According to the equivalent resistance gradient model of metamorphic mechanisms, with considering the uncertainties in the link dimensions, masses, and compliance parameters et al, a probabilistic evaluation method for describing the configuration transformation ability of the constrained metamorphic mechanism is established. Based on reliability evaluation and reliability sensitivity analysis, a reliability optimization design method for improving the configuration transformation ability is proposed, and then the optimization design is carried out for tolerances of random variables focusing on those structural parameters with higher reliability sensitivity, so that the optimized results can satisfy the requirements of both reliability and economic simultaneously. Finally, the feasibility and effectiveness of the proposed method is verified by the illustration of a paper folding metamorphic mechanism. The research provides the foundation of reliability design of metamorphic mechanisms to obtain the high-probability repeated execution ability of configuration transformation, it also has theoretical and practical significance to promote the engineering application of metamorphic mechanisms.

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Section: Introductionmentioning

confidence: 99%

Reliability Optimization Design of Constrained Metamorphic Mechanism Based on the Augmented Assur Groups

YANG,

ZHANG,

SUN

et al. 2024

Preprint

View full text Add to dashboard Cite

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Research on the Motion Reliability of Nursing Bed Mechanism Based on Response Surface Method

Pei,

Li,

et al. 2023

J. Phys.: Conf. Ser.

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To study the analysis and optimization of the motion reliability of multifunctional nursing bed mechanism, the ADAMS software platform was chosen to simulate the parametric modeling of the nursing bed with consideration of dimensional and clearance errors. Taking the back-raising mechanism as an example, we verify the accuracy of the model by comparing the experimental data. Based on the effect of clearance error, a response surface model with motor end hinge clearance, push rod end hinge clearance, back support pivot clearance, and bed plate hinge clearance, as the influencing factors and angular velocity reliability and angular acceleration reliability as the response values, were established, and the significance of the influencing factors of the response values was obtained by using ANOVA. Based on the reliability of angular velocity as the optimization target and each influencing factor, simulation experiments were conducted to verify that the error of the model optimization result of the response surface method was 1.64%. It shows that the model prediction is more accurate and the response surface method is feasible for the mechanism motion reliability optimization analysis.

show abstract

Reliability Optimization Design of Constrained Metamorphic Mechanism Based on the Augmented Assur Groups

Yang,

Zhang,

Sun

et al. 2024

Applied Sciences

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In order to obtain stable and reliable configuration transformation ability, reliability optimization design is regarded as an effective way to reduce the probability of kinematic function failure for the constrained metamorphic mechanism. Based on the structural composition principle of multi-configuration source metamorphic mechanism that can operate in an under-actuated state, the modularized calculation methods are established for the force analysis of augmented Assur groups including metamorphic kinematic joints. According to the equivalent resistance gradient model of metamorphic mechanisms, with considering the uncertainties in the link dimensions, masses, and compliance parameters et al., a probabilistic evaluation method for describing the configuration transformation ability of the constrained metamorphic mechanism is established. Based on reliability evaluation and reliability sensitivity analysis, a reliability optimization design method for improving the configuration transformation ability is proposed, and then the optimization design is carried out for tolerances of random variables focusing on those structural parameters with higher reliability sensitivity, so that the optimized results can satisfy the requirements of both reliability and economic simultaneously. Finally, the feasibility and effectiveness of the proposed method is verified by the illustration of a paper folding metamorphic mechanism. The research provides the foundation of reliability design of metamorphic mechanisms to obtain the high-probability repeated execution ability of configuration transformation, it also has theoretical and practical significance to promote the engineering application of metamorphic mechanisms.

show abstract

Kinematic Reliability Analysis of Planar Metamorphic Mechanism with Multi-source Uncertainties

Cited by 3 publications

References 8 publications

Reliability Optimization Design of Constrained Metamorphic Mechanism Based on the Augmented Assur Groups

Reliability Optimization Design of Constrained Metamorphic Mechanism Based on the Augmented Assur Groups

Research on the Motion Reliability of Nursing Bed Mechanism Based on Response Surface Method

Reliability Optimization Design of Constrained Metamorphic Mechanism Based on the Augmented Assur Groups

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