Wavelet analysis to decompose a vibration simulation signal to improve pre-distribution testing of packaging

Griffiths, Katharine; Hicks, Ben; Keogh, Patrick; Shires, David

doi:10.1016/j.ymssp.2015.12.035

Cited by 25 publications

(24 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Griffiths, Hicks, Keogh, and when compared with the damage produced in field experiments. 86,89,90 In another recent study, 91 the capability of machine learning to detect shocks in road vibration signals was investigated and reported to also have achieved successful correlation. Further research on these methods to characterize damage on different fruits may permit the development of more accurate test profiles to be used in simulation compared with the conventional-averaged PSD spectrabased simulation approach.…”

Section: Transient Shocks In Vibration Profilesmentioning

confidence: 99%

Measurement and evaluation of the effect of vibration on fruits in transit—Review

et al. 2018

View full text Add to dashboard Cite

Mechanical vibration is a prominent cause of produce damage in many postharvest fruit supply chains. Knowledge on the causes, occurrence, and mechanistic relationship of vibration to produce damage is important for systematic development of remedial actions. This review identifies and discusses the critical factors of vibration, their implications for fruit quality, and possible improvements to addressing the issue of fruit quality deterioration. Frequently reported mechanical damage types caused by vibration on fruits are scuffing, fruit rub, and skin bruising. A wide range of factors can significantly affect the vibration intensity and thus resultant mechanical damage. Critical frequencies of vibration in the range of 0 to 10 Hz, attributed to peak energy levels in the power spectrum, cause substantial damage in fruits. Greater vertical acceleration and transmission of vibration to the higher tiers in a stacked column of packages result in increased mechanical damage. Fruit packages stacked in the rear positions of trucks are also affected more by vibration. Produce transported in leaf spring trucks has a higher risk of damage when compared with air-ride suspension trucks. Additionally increased road roughness, vehicle speed, and duration of exposure to vibration proliferate fruit damage. The effects of different inner packing methods and different package types on mechanical damage are less frequently investigated. More accurate characterization of mechanical damage caused by vibration and shocks and its reproduction by enhanced simulation methods will contribute to optimizing damage prevention mechanisms and further improving the quality of fruits in transit within the postharvest supply chain.

show abstract

Section: Transient Shocks In Vibration Profilesmentioning

confidence: 99%

Measurement and evaluation of the effect of vibration on fruits in transit—Review

et al. 2018

View full text Add to dashboard Cite

show abstract

“…Arguably, this approach allows for a better simulation of the overall vibration acceleration distribution, especially for the higher level events. Griffiths 11,12 proposed the wavelet decomposition method. The original signal is decomposed into a series of Gaussian approximation segments based on wavelet analysis firstly, and then, the simulated signal consists of a concatenation of simulated short Gaussian signals, which includes as far as possible any nonstationary characteristics from the original signal.…”

Section: Simulation Methods Chosen For Comparisonmentioning

confidence: 99%

“…• Modulated RMS distribution 9,10 • Wavelet decomposition 11,12 Shires et al 13 established a device to measure scuffing as a response to vibration input, which has been validated and shown to generate repeatable results in laboratory-based studies. Griffiths et al 11,14 investigated the correlation of several improved simulation techniques based on this scuff measuring device.…”

Section: • Time Replicationmentioning

confidence: 99%

“…Accordingly, several improved simulation techniques have been proposed and developed as follows, and the detail introduction and comments of each method have been presented in our earlier study already, which will not be repeated here. Time replication Two‐way split spectral Three‐way split spectral Shock on random Kurtosis control Modulated RMS distribution Wavelet decomposition …”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Comparison study on simulation effect of improved simulation methods for packaging random vibration test

Zhou

Wang

2018

Packag Technol Sci

View full text Add to dashboard Cite

In general, existing testing methods for packaging design employ Gaussian distributions to represent vibration induced by road profiles. However, the actual road vehicle vibration is non‐Gaussian. The key limitation is that the simulated Gaussian vibration cannot reconstruct the shock events buried in the vibration, which will result in inaccurate reliability evaluation of cushion packaging. A new simulation technique called shock extraction has been proposed and validated in our earlier study. This article is a further study of our previous research. The shock extraction method has been compared with other three representative simulation methods including the single‐level PSD, three‐way split spectral, and wavelet decomposition in terms of simulation effect. Signal simulated by the shock extraction method possesses the same vibration intensity, duration, approximate statistical characteristics, and PSD plots with the original signal. The results show that the simulation effect of the shock extraction method is the best, and the worst is the single‐level PSD. The wavelet decomposition and three‐way split spectral are somewhere in the middle.

show abstract

“…Iterative wavelet analysis method (Rahman et al 2017;Zhang et al 1998) was proposed in 1998, which makes the wavelet analysis method can be carried out online and the calculation is simpler. Therefore, the signal analysis based on wavelet is widely used in various fields (Durocher et al 2016;Griffiths et al 2016;Han & Micheline 2001). However, since the wavelet method is a trade-off between time and frequency, there is no guarantee that time and frequency has good resolution at the same time.…”

Section: Introductionmentioning

confidence: 99%

On-line Detection Method for Outliers of Dynamic Instability Measurement Data in Geological Exploration Control Process

Liu¹,

Su²,

Zhao³

et al. 2017

JSM

View full text Add to dashboard Cite

show abstract

Wavelet analysis to decompose a vibration simulation signal to improve pre-distribution testing of packaging

Cited by 25 publications

References 16 publications

Measurement and evaluation of the effect of vibration on fruits in transit—Review

Measurement and evaluation of the effect of vibration on fruits in transit—Review

Comparison study on simulation effect of improved simulation methods for packaging random vibration test

On-line Detection Method for Outliers of Dynamic Instability Measurement Data in Geological Exploration Control Process

Contact Info

Product

Resources

About