Non-linearregressionanalysismethodforvelocityprofileprocessingof

instantaneousdisplacementinterferometer

LI Xue-mei; ZHANG Lin; LI Ying-hua; YU Yu-ying; WANG Xiang; MA Yun

doi:10.11883/1001-1455(2010)01-0080-05

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LI Xue-mei, ZHANG Lin, LI Ying-hua, YU Yu-ying, WANG Xiang, MA Yun. Non-linearregressionanalysismethodforvelocityprofileprocessingofinstantaneousdisplacementinterferometer[J]. Explosion And Shock Waves, 2010, 30(1): 80-84. doi: 10.11883/1001-1455(2010)01-0080-05

Citation:

LI Xue-mei, ZHANG Lin, LI Ying-hua, YU Yu-ying, WANG Xiang, MA Yun. Non-linearregressionanalysismethodforvelocityprofileprocessingof instantaneousdisplacementinterferometer[J]. Explosion And Shock Waves, 2010, 30(1): 80-84. doi: 10.11883/1001-1455(2010)01-0080-05

Citation:

LI Xue-mei, ZHANG Lin, LI Ying-hua, YU Yu-ying, WANG Xiang, MA Yun. Non-linearregressionanalysismethodforvelocityprofileprocessingof instantaneousdisplacementinterferometer[J]. Explosion And Shock Waves, 2010, 30(1): 80-84. doi: 10.11883/1001-1455(2010)01-0080-05

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Non-linearregressionanalysismethodforvelocityprofileprocessingof instantaneousdisplacementinterferometer

doi: 10.11883/1001-1455(2010)01-0080-05

1.
NationalKeyLaboratoryofShock WaveandDetonationPhysics,InstituteofFluidPhysics,

Funds:

NationalNaturalScienceFoundationofChina(10802080)

Publish Date: 2010-01-25

Abstract

Abstract

Anewmethodforvelocityprofiledataprocessingofupdatedinstantaneousdisplacementinterferometerisdevelopedinthispaper, whichmainlyaimsattheDPS(displacementpinsystem)in ChinaandPDV (photonDopplervelocimeter)inAmerica.Thismethodisbasedontheideaofrevivifyingmeasuredsignalbynon- linearregressionanalysis(NLRA),andthemainanalyzingprocessis presented.ComparingwiththetraditionalPick-Peaksmethodwhichisbasedondiscretedataprocessingidea, itcanobtainhigheraccuracyforvelocityprofileandhasastrongerabilitytodistinguishits details,especiallywhenitisusedtodealwithelasitc-plasticlowpressureimpactresponseofmaterials. Atlast,thecharacteristicsofthismethodarediscussedindetailbycalculatingthefree-surface velocityprofilesofSnand45steelundergoingalowpressureplanarimpactandmeasuredwithDPS.
- solidmechanics,
- non-linearregressionanalysis,
- instantaneousdisplacementinterferometer,
- velocityprofile