Optimization approach for identification of dynamic parameters of localized joints of aircraft assembled structures

Hernández, Santiago; Menga, Edoardo; Moledo, S.; Romera, Luis; Baldomir, Aitor; López, Carlos; Montoya, Miguel Cid

doi:10.1016/j.ast.2017.07.026

Cited by 19 publications

(6 citation statements)

References 25 publications

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“…The control strategy actually includes three steps: (1) the torque requirement of the driving intention, (2) the driving mode demarcation, (3) the torque distribution between the ICE and the EM. Once these contents have been decided, the mode switching type can be defined according to the classification illustrated in Driving mode switching classfication, next the control for each type will be discussed, and Hernández (2017) proposed a dynamic parameter identification method that can help to identify the parameters in the dynamic model of the switching processes.…”

Section: Coordinated Control Strategymentioning

confidence: 99%

Design of coordinated control strategy during driving mode switching for parallel hybrid electric vehicles

Song

et al. 2018

Transactions of the Institute of Measurement and Control

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Hybrid electric vehicles (HEVs) require the power to drive the vehicle via a combination of internal combustion engine (ICE) and electric machine (EM). To improve the drivability, the smooth torque change during the driving mode switching is essential. This task can be achieved by using the coordinated control strategy. This paper presents a coordinated control strategy based on considering the different dynamic response characteristics of the ICE and the EM, which can effectively suppress the torque surge during the driving mode switching processes. The novelty lies in the proposed control is a motor active synchronization control strategy without clutch disengagement based on the mode switching classification. The coordinated control strategy is designed according to the classification of the driving modes. The objective is to minimize torque fluctuation and maintain or improve the driving performance of the vehicle. Results from the computer simulation demonstrate the effectiveness of this approach in reducing the torque surge without sacrificing vehicle performance.

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Section: Coordinated Control Strategymentioning

confidence: 99%

Design of coordinated control strategy during driving mode switching for parallel hybrid electric vehicles

Song

et al. 2018

Transactions of the Institute of Measurement and Control

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“…For example, Liu et al found that the external loads and connecting structures could change the nonlinear contact characteristics of bolts, which affect the rotating state of the rotor [12]. Another study combined bolt fastening with rotor dynamic response analysis to establish the effective dynamic characteristics [13][14][15]. Marc proposed a nonlinear dynamic model of the local contact and bolt connection quality for a bolted flange structure of an aero-engine [16].…”

Section: Introductionmentioning

confidence: 99%

Prediction of bolt missing fault for multistage rotor by experimental test and analysis

CHI²,

Fan³

et al. 2022

Int J Adv Manuf Technol

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The high-pressure rotor of aero-engine is assembled by numerous bolts under high manufacture precision. The connected structure is subjected to both axial force and transverse vibration during service, which may result in individual bolt loosen. In this study, the influence of bolt missing on the dynamic characteristics is analyzed by numerical simulation. A test rig capable of impact and frequency sweeping experiment under axial tension was constructed. The vibration response features in the simulation were then extracted. The loss function of the mean absolute error and the decision method of extreme gradient boosting were used to predict the bolt missing position. The results show that the proposed model can reach a prediction precision of more than 90%. Moreover, the coefficient of determination evaluation index of the prediction effect reaches 0.9, which is significantly higher than those of other conventional models such as multivariate linear regression and multivariate adaptive regression spliness.

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“…From a modeling point of view, they are often reduced to a set of linear springs with some stiffness and damping values. It happens that, during the project, these values are reviewed, argued and fine-tuned to get a reasonable or expected dynamic response [1,2]. Local parameters are changed one at a time to see their effect on the outputs: the higher the number of input parameters, the more tedious the task is and the more complex the understanding of the results as well.…”

Section: Introductionmentioning

confidence: 99%

A sample-based approach to estimate the dynamic loads of components with nonlinear uncertain interfaces

Menga

Sánchez

Romero

et al. 2019

Aerospace Science and Technology

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Predicting aircraft dynamics and vibration loads at components' interfaces is a key task for ensuring a robust design and development of the product. Usually, whereas in the case of isolate components the dynamic behavior can be predicted quite accurately, when several components are assembled through discontinuous junctions the predictiveness of a model decreases. The junctions, whose mechanical properties are seldom well characterized experimentally, often introduce nonlinearities in the loads' path. Additionally, their behavior is intrinsically uncertain and as a consequence, the dynamic response of the connected structures becomes stochastic. We propose a sample-based approach which aims to cope with both aspects, nonlinearities and uncertainties, and can be split in two main tasks. First, the computational cost of each deterministic simulation is minimized considering that the global nonlinear behavior depends on localized sources of nonlinearities at the interfaces. Second, the uncertainties are propagated through the model by a non-intrusive method based on Sobol's low discrepancy design. Attention is paid to the global sensitivity indices, which are estimated by creating a meta-model based on Polynomial Chaos Expansion. An industrial application considering an aircraft component whose dynamic behavior is affected by uncertain free-plays at its interfaces is presented.

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Optimization approach for identification of dynamic parameters of localized joints of aircraft assembled structures

Cited by 19 publications

References 25 publications

Design of coordinated control strategy during driving mode switching for parallel hybrid electric vehicles

Design of coordinated control strategy during driving mode switching for parallel hybrid electric vehicles

Prediction of bolt missing fault for multistage rotor by experimental test and analysis

A sample-based approach to estimate the dynamic loads of components with nonlinear uncertain interfaces

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