Metrology Assisted Assembly of Airplane Structure Elements

Schmitt, Robert; Witte, Andreas; Janßen, Markus; Bertelsmeier, Felix

doi:10.1016/j.procir.2014.10.073

Cited by 21 publications

(17 citation statements)

References 2 publications

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“…In many research projects, industrial robots are integrated into the jigs in order to create an adaptivity to the assembly situation. The goals are a faster adaptation to product changes, the compensation of shape and position errors and the full automation of joining processes [5,6,7]. Improving ergonomics is therefore not the focus of these approaches.…”

Section: Jigs and Fixtures For Assembling Aircraft Componentsmentioning

confidence: 99%

“…Schmitt et al pursue the goal to develop an automated metrology assisted robot based positioning and untwist process. The process shall replace rigid jigs by a programmable robot system [6]. They are developing a model of the components deformation behavior to determine the necessary compensatory movements of the robots.…”

Section: Jigs and Fixtures For Assembling Aircraft Componentsmentioning

confidence: 99%

See 1 more Smart Citation

Mobile, Modular and Adaptive Assembly Jigs for Large-Scale Products

Hogreve

Krist

Tracht

2022

Annals of Scientific Society for Assembly, Handling and Industrial Robotics 2021

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The assembly of products is often supported by jigs. Especially for large dimensional products, jigs and fixtures are used to align the components and ensure the stability of the assembly until all parts are firmly mounted. This paper describes the development of mobile, modular and adaptive assembly jigs, which are designed to support ergonomic working in the production of high-lift systems for civil aircrafts. The jig supports the workers to adapt the position and orientation of the product to the current assembly operation. The fundamentals of the development are explained and the features of a concept, called assembly wheel, are presented. The assembly wheel consists of two or more robot arms on a circular seventh axis. The robot arms hold and position the components to be assembled so that all joining spots are freely accessible to the worker. The ergonomic benefits of the concept were examined in a study using a 3D model of the jig. A demonstrator on a scale of 1:2 was set up, with which real experiments with an adaptive jig can be conducted for evaluation.

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Section: Jigs and Fixtures For Assembling Aircraft Componentsmentioning

confidence: 99%

Section: Jigs and Fixtures For Assembling Aircraft Componentsmentioning

confidence: 99%

Mobile, Modular and Adaptive Assembly Jigs for Large-Scale Products

Hogreve

Krist

Tracht

2022

Annals of Scientific Society for Assembly, Handling and Industrial Robotics 2021

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“…The measuring mathematic model of R-LAT system has indicated that, for each R-LAT, its two laser plane f1 and f2 formulate two coplanar equations with the rotation angle θ1 and θ2 that go through the target photoelectric sensor P as below: (3) Where [xp,yp,zp,1] T is the coordinate of target photoelectric sensor P in the R-LAT coordinate frame (OT-XTYTZT), and Rz(θ) is the rotation matrix around Z-axis given as follow:…”

Section: Cmm-assisted Intrinsic Parameter Calibrationmentioning

confidence: 99%

An Intrinsic Parameter Calibration Method for R-LAT System Based on CMM

Guo

Liu

et al. 2021

Preprint

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Rotary-laser automatic theodolite (R-LAT) system is a distributed large-scale metrology system, which provides parallel measurement in scalable measurement room without obvious precision losing. Each of R-LAT emits two nonparallel laser planes to scan the measurement space via evenly rotation, while the photoelectric sensors receive these laser planes signals and performs the coordinate calculation based on triangulation. The accurate geometric parameters of the two laser planes plays a crucial role in maintaining the measurement precision of R-LAT system. Practically, the geometry of the two laser plane, which is termed as intrinsic parameters, is unknown after assembled. Therefore, how to figure out the accurate intrinsic parameters of each R-LAT is a fundamental question for the application of R-LAT system. This paper proposed an easily operated intrinsic parameter calibration method for R-LAT system with adopting coordinate measurement machine. The mathematic model of laser planes and the observing equation group of R-LAT are established. Then, the intrinsic calibration is formulated as a nonlinear least square problem that minimize the sum of deviations of target points and laser planes, and the ascertain of its initial guess is introduced. At last, experience is performed to verify the effectiveness of this method, and simulations are carried out to investigate the influence of the target point configuration on the accuracy of intrinsic parameters.

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“…Some indicators, such as equipment state, failure rate, energy consumption efficiency, and environmental emissions, will continue to change as the service time increases [39]. All of these states are functions of time t. Therefore, monitoring data are analyzed and fused to determine the changing rules of each indicator [40]. Wang et al [41] thought that an appropriate data processing method should be used to improve the reliability of the results.…”

Section: Rtp Based On Remote Condition Monitoringmentioning

confidence: 99%

A Service-Oriented Remanufacturing Framework With Recovery Timing Prediction Based on Remote Condition Monitoring

et al. 2019

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Remanufacturing is generally regarded as a key technology to implement cleaner production. However, in traditional remanufacturing, scrap products are recycled and remanufactured after their performance declines sharply. This passive approach easily arises many problems such as increases of remanufacturing cost, unstable product quality, and unsatisfactory customer demand, which brought great challenges to the remanufacturing industry. To address these challenges, a novel framework, namely serviceoriented remanufacturing (SORM), is proposed to improve the overall efficiency of remanufacturing. Contrast to the traditional mode, SORM actively recovers in-service products at the optimal recovery time based on their real-time performance obtained by remote monitoring. The operational logic and implementation path of SORM is firstly discussed. Then the recovery timing prediction (RTP) model, as the core issue of the SORM, is presented to figure out the optimal recovery time of in-service products. Moreover, a comprehensive method combining a two-parameter Weibull distribution (TPWD) and gene expression programming (GEP) is developed to solve the model. The example of excavator remanufacturing illustrates the feasibility of the SORM. Finally, the key findings and managerial implications from application results and discussion are summarized, which provides the theoretical guidance and technical support for better sustainable development.INDEX TERMS Service-oriented remanufacturing, recovery timing prediction, remote condition monitoring, Weibull distribution, gene expression programming.

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Metrology Assisted Assembly of Airplane Structure Elements

Cited by 21 publications

References 2 publications

Mobile, Modular and Adaptive Assembly Jigs for Large-Scale Products

Mobile, Modular and Adaptive Assembly Jigs for Large-Scale Products

An Intrinsic Parameter Calibration Method for R-LAT System Based on CMM

A Service-Oriented Remanufacturing Framework With Recovery Timing Prediction Based on Remote Condition Monitoring

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