Human reach envelope and zone differentiation for ergonomic design

Yang, Jingzhou; Abdel‐Malek, Karim

doi:10.1002/hfm.20135

Cited by 23 publications

(5 citation statements)

References 32 publications

(31 reference statements)

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“…In terms of envelope establishment, various approaches for human reach envelopes were introduced by Yang and Abdel-Malek [35], such as the experiment-based approach, voxel-based method, and closed-form method. Yang, Sinokrot, and Abdel-Malek presented a general analytical method to determine the upper extremity workspace for any percentile virtual humans [36].…”

Section: Literature Reviewmentioning

confidence: 99%

Spatial Data-Based Automatic and Quantitative Approach in Analyzing Maintenance Reachability

Geng

Liu

Guo³

et al. 2022

Applied Sciences

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Reachability, as a vital parameter in product maintainability design, exerts a tremendous influence in practical maintenance, especially in the usage stage. To decrease subjectivity in maintenance reachability analysis, this study proposes an automatic and quantitative approach based on the spatial data of the human arm to implement maintenance reachability analysis. The approach focused on two aspects, namely, accuracy and efficiency. In terms of accuracy, the presented methodology starts from the maintenance spot where the human hand is attached. An original global data sequence set was generated, including the wrist, elbow, and shoulder joints, under the constraints of kinematics, in which a data sequence represents an arm motion. Moreover, the surrounding objects are represented by their geometric data, in which each data sequence is analyzed to judge whether collision occurs between arm segments and surrounding objects. In this filtering process, the data sequence is retained if the aforementioned collision does not occur. In terms of efficiency, owing to the large number of global data sequences, the efficiency of the interval selection in collision calculation is also taken into consideration in this methodology. Unlike the traditional methods in the virtual environment, the starting point is the maintenance spot, rather than the human body. Hence, nearly all possibilities of arm postures are considered in a global perspective with little subjective involvement, which enhances the automation and objectivity in maintenance reachability analysis to a certain extent. The case study shows the usability and feasibility by a practical maintenance scene.

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Section: Literature Reviewmentioning

confidence: 99%

Spatial Data-Based Automatic and Quantitative Approach in Analyzing Maintenance Reachability

Geng

Liu

Guo³

et al. 2022

Applied Sciences

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“…Various types of digital human models were applied for the ergonomic assessment and design of workplaces in different areas. A relatively substantial number of studies were performed within the automotive manufacturing, for instance, examining automotive assembly tasks [ 40 ], driver’s seat adjustment ranges [ 52 ], driver’s workplace design [ 57 ], reach envelopes in the vehicle workspace [ 58 ], or lately statistical approaches for predicting postures [ 59 ].…”

Section: Applications Of Dhmmentioning

confidence: 99%

Preventing Work-Related Musculoskeletal Disorders in Manufacturing by Digital Human Modeling

Grobelny

Michalski

2020

IJERPH

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This research concerns the workplace design methodology, involving digital human models, that prevents work-related musculoskeletal disorders (WMSDs). We propose an approach that, in conjunction with one of the classic WMSD risk assessment methods, allows one to simplify simulations in a three-dimensional digital environment. Two real-life workstations from a manufacturing industry were modelled in a 3D Studio Max environment by means of an Anthropos ErgoMax system. A number of simulations show that, for the examined cases, classic boundary mannequins’ approaches can be replaced by using 50th percentile of a population individual, with a minimal impact on the WMSD risk. Although, the finding might not be suitable in all situations, it should be considered, especially where compromise solutions are being sought due to other criteria.

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“…All joints are assumed to be revolute joints in which each degree of freedom is treated as a hinge. To describe and represent the locations of the body links with respect to the reference frame attached to the hip joint, the Denavit-Hartenberg (D-H) representation was adopted (Fu, Gonzalez, & Lee, 1988;Yang & Abdel-Malek, 2009). With four parameters, the D-H representation results in a 4 × 4 homogeneous transformation matrix, T i−1 i , representing each link's coordinate frame i at a joint with respect to the previous link's coordinate frame i−1.…”

Section: Kinematic Modeling Of the Upper Bodymentioning

confidence: 99%

Two‐handed human reach prediction models for ergonomic evaluation

Jung¹,

Shin²

2010

Hum Ftrs & Erg Mfg Svc

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As an essential function of computerized ergonomic evaluation models based on digital human models, realistic simulation or prediction of human reach profiles is of great importance. Although several human-modeling efforts have been made to provide the capability of reach simulation, most studies have been limited to the reach of a single extremity. A variety of activities of human operators, however, frequently involve simultaneous positioning of two or more extremities to different target positions. Such a multiple reach problem cannot be satisfactorily resolved by means of conventional single-extremity reach models because formulation of the problem as a series of single reaches rarely yields accurate trajectory of human-reach profiles due to interactions of multiple extremities. In this research, a two-handed reach prediction model was developed. The human upper body was modeled as a seven-link system with 13 degrees of freedom, being regarded as a redundant open kinematic chain with two end-effectors. As a way of solving the two-handed reach problem, the resolved motion method was adopted among several inverse kinematics methods as the technique is fit for real-time redundancy control. The method is also capable of incorporating the joint range availability criterion as a cost function to minimize excessive deviations of body joints from their neutral positions. Real human-reach profiles were compared to those obtained from the prediction model and were found to be statistically similar. The methodology is expected to be applicable to the reach simulation of both upper and lower extremities without algorithmic difficulties. C 2010 Wiley Periodicals, Inc.

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Human reach envelope and zone differentiation for ergonomic design

Cited by 23 publications

References 32 publications

Spatial Data-Based Automatic and Quantitative Approach in Analyzing Maintenance Reachability

Spatial Data-Based Automatic and Quantitative Approach in Analyzing Maintenance Reachability

Preventing Work-Related Musculoskeletal Disorders in Manufacturing by Digital Human Modeling

Two‐handed human reach prediction models for ergonomic evaluation

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