Title:
TEST SPECIFICATION DESIGN METHOD FOR RANDOM VIBRATION TEST
Document Type and Number:
WIPO Patent Application WO/2008/001836
Kind Code:
A1
Abstract:
A method for designing adequate random vibration test specifications by determining the
rate of shortening of the test time by using a unique accumulated fatigue calculation method
while complying with a linear damage rule. The test specification design method
is characterized by comprising a step of dividing PSD data on random vibration into
a predetermined number of divisions, a step of counting the random vibration waveforms
in each division, a step of obtaining a distribution histogram A by performing
multiplication by the constitution proportion of the distribution histogram
in each division and adding the products of the multiplication, a step of obtaining
a distribution histogram B by deleting the data out of a range of a predetermined
value from the histogram A, a step of determining the corresponding equivalent
frequency NA by normalizing the distribution histogram A with the equivalent
acceleration G0, a step of obtaining the corresponding equivalent frequency
NB by normalizing the distribution histogram B with the same equivalent acceleration
G0 as the distribution histogram A, and a step of determining the ratio of the equivalent
frequencies NA, NB.
Inventors:
MAEZAWA, Eiichi (7-3 Marunouchi 2-chome, Chiyoda-k, Tokyo 10, 1008310, JP)
前澤 英一 (〒10 東京都千代田区丸の内二丁目７番３号 三菱電機株式会社内 Tokyo, 1008310, JP)
前澤 英一 (〒10 東京都千代田区丸の内二丁目７番３号 三菱電機株式会社内 Tokyo, 1008310, JP)
Application Number:
JP2007/062969
Publication Date:
January 03, 2008
Filing Date:
June 28, 2007
Export Citation:
Assignee:
Mitsubishi Electric Corporation (7-3 Marunouchi 2-chome, Chiyoda-ku Tokyo, 10, 1008310, JP)
三菱電機株式会社 (〒10 東京都千代田区丸の内二丁目７番３号 Tokyo, 1008310, JP)
MITSUBISHI ELECTRIC LOGISTICS CORPORATION (2-1-6, Sasazuka Shibuya-k, Tokyo 73, 1510073, JP)
三菱電機ロジスティクス株式会社 (〒73 東京都渋谷区笹塚二丁目１番６号 Tokyo, 1510073, JP)
三菱電機株式会社 (〒10 東京都千代田区丸の内二丁目７番３号 Tokyo, 1008310, JP)
MITSUBISHI ELECTRIC LOGISTICS CORPORATION (2-1-6, Sasazuka Shibuya-k, Tokyo 73, 1510073, JP)
三菱電機ロジスティクス株式会社 (〒73 東京都渋谷区笹塚二丁目１番６号 Tokyo, 1510073, JP)
International Classes:
G01M7/02; G01M7/00
Attorney, Agent or Firm:
KOBAYASHI, Hisao et al. (KISA PATENT & TRADEMARK FIRM, The 6th Central Bldg.19-10, Toranomon 1-chom, Minato-ku Tokyo 01, 1050001, JP)
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