Time-Variant Reliability-Based Design Optimization Using an Equivalent Most Probable Point

Fang, T.; Jiang, Chao; Huang, Zhi; Wei, Xinpeng; Han, Xu

doi:10.1109/tr.2018.2823737

Cited by 28 publications

(9 citation statements)

References 37 publications

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“…Ideally, both manufacturing cost and reliability should be accounted for during the design stage. There are some examples of this in the literature (Dey et al 2016;Fang et al 2019;Chakri et al 2017;Jiang et al 2016;Beck and Gomes 2012;Dersjo and Olsson 2011;Strano 2010;Beck and Gomes 2010). One notable example is (Fang et al 2019), where a time-variant methodology was developed for optimising the reliability and the welding cost of a beam structure.…”

Section: Introductionmentioning

confidence: 99%

“…There are some examples of this in the literature (Dey et al 2016;Fang et al 2019;Chakri et al 2017;Jiang et al 2016;Beck and Gomes 2012;Dersjo and Olsson 2011;Strano 2010;Beck and Gomes 2010). One notable example is (Fang et al 2019), where a time-variant methodology was developed for optimising the reliability and the welding cost of a beam structure. Chakri et al (2017) developed a directional bat algorithm also for the reliability and welding cost of a beam structure.…”

Section: Introductionmentioning

confidence: 99%

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Reliability-based bottom-up manufacturing cost optimisation for composite aircraft structures

Morse

Cartabia²,

Mallardo

2022

Struct Multidisc Optim

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A novel methodology is presented for the reliability-based manufacturing cost optimisation of composite aircraft structures. A comprehensive bottom-up costing approach is employed, enabling precise manufacturing cost estimation in terms of material, machine, labour, tooling, and indirect costs. This approach splits the manufacturing process into many individual activities, which can be combined in many different ways, allowing the proposed optimisation methodology to be applied to a wide range of composite aircraft structures. A genetic algorithm (GA) is coupled with a deep neural network (DNN) to efficiently determine the optimal composite ply stacking sequence for every part of an assembled structure. A numerical example featuring a composite-stiffened aircraft fuselage panel is investigated. The reliability of the panel is measured in terms of its buckling resistance, and its manufacturing cost is estimated based on the individual costs of over 20 activities. The labour times for each activity were estimated based on data collected from an aerospace company specialising in the manufacture of advanced composite aircraft structures. Results indicate that material, machine, labour, and tool costs can vary significantly depending on the level of structural reliability required, demonstrating the importance of accounting for non-material costs when designing composite aircraft structures.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Reliability-based bottom-up manufacturing cost optimisation for composite aircraft structures

Morse

Cartabia²,

Mallardo

2022

Struct Multidisc Optim

View full text Add to dashboard Cite

show abstract

“…All of this suggests that kinematic robot reliability is an essential study area with several applications. e kinematic reliability problem of robots can be divided into two categories: point reliability and time-dependent reliability [10][11][12][13]. e instantaneous failure rate at a point on the trajectory is reflected in point reliability regardless of whether motion is valid at other points, which commonly occurs during the measurement of the repeatability of positioning.…”

Section: Introductionmentioning

confidence: 99%

Kinematic Reliability Analysis of a 7-DOF Redundant Robot

Ding

et al. 2022

Journal of Robotics

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The kinematic reliability of robots, defined as the probability that the end-effector falls inside the specified safe boundary, is of great significance in predicting the accuracy achieved in reality. This work selects the 7 degrees-of-freedom (7-DOF) redundant robot as an example to conduct reliability analysis by utilizing the envelope method against time-related issues in this work. Since variables in industrial robots are very small relative to their means, the motion error functions are commonly linearized by the first-order Taylor’s formula to simplify calculation, and the failure models in all directions and attitude angles are then established through the probability method over the entire input interval. As a result, the actual accuracy of the robot in each pose component will be displayed, instead of merely considering the position error like other scholars. The principle of the proposed method is to transform a time-dependent problem into a time-independent one with the help of the failure extreme points and endpoints, so as to enhance the operation efficiency under the premise of ensuring accuracy. Finally, the simulation results verify that the relative error of the envelope method is less than 6.0% compared with that of the Monte Carlo simulation method, and the computational efficiency is higher than that of the Monte Carlo method, which demonstrates that the envelope method has better comprehensive performance.

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“…Dubourg et al [37] utilized the adaptive kriging metamodeling technique to surrogate the NTR functions and then adopted the subset simulation technique to analyze the reliability sensitivity. Fang et al [38] presented a concept of the equivalent most probable point (EMPP) and then transformed the NTR-based design into an equivalent time-invariant problem. Ma et al [39] established a structural size and shape optimization model with dynamic reliability constraints.…”

Section: Introductionmentioning

confidence: 99%

A novel dynamic reliability-based topology optimization (DRBTO) framework for continuum structures via interval-process collocation and the first-passage theories

Wang

Liu

et al. 2021

Computer Methods in Applied Mechanics and Engineering

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Time-Variant Reliability-Based Design Optimization Using an Equivalent Most Probable Point

Cited by 28 publications

References 37 publications

Reliability-based bottom-up manufacturing cost optimisation for composite aircraft structures

Reliability-based bottom-up manufacturing cost optimisation for composite aircraft structures

Kinematic Reliability Analysis of a 7-DOF Redundant Robot

A novel dynamic reliability-based topology optimization (DRBTO) framework for continuum structures via interval-process collocation and the first-passage theories

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