CAE waveform assessor

• US 6,745,139 B2
• Filed: 08/14/2002
• Issued: 06/01/2004
• Est. Priority Date: 08/14/2002
• Status: Active Grant

• Current Assignee: Ford Global Technologies, LLC (Ford Motor Company)
• Original Assignee: Ford Global Technologies, LLC (Ford Motor Company)
• Inventors: Chen, Ping, Le, Jialiang, Chou, Clifford C
• Primary Examiner(s): Hoff, Marc S.
• Assistant Examiner(s): Raymond, Edward
• Application Number:
  US10/064,760
• Publication Number:
  US 20040034488A1
• Time in Patent Office: 657 Days
• Field of Search: 703/2, 703/5, 703/4, 703/8, 702/38, 702/57, 702/66, 702/94-97, 702/104, 702/142, 702/143, 702/150-153, 702/189, 701/1, 701/2, 701/23, 701/116, 701/223, 701/301
• US Class Current: 702/66
• CPC Class Codes: G06F 30/20 Design optimisation, verification or simulation optimisation, verification or simulation of circuit designs G06F30/30

Abstract

A CAE waveform assessor 10 is provided, including a CAE resultant waveform 12 and a reference waveform 16. The CAE waveform assessor 10 utilizes a time domain assessor 18 to produce a time domain index 22 by comparing the CAE resultant waveform 12 with the reference waveform 16. A frequency domain assessor 20 produces a frequency domain index 24 by comparing the CAE resultant waveform 12 with the reference waveform 16. Finally, an overall assessor 26 combines the time domain index 22 with the frequency domain index 24 to produce an overall index 28:

Claims

1. A dynamic crash pulse wave assessor comprising:

a crash pulse waveform;

a reference waveform;

a time domain assessor including a first crash pulse waveform integrator, said time domain assessor comparing said crash pulse waveform to said reference waveform to produce a time domain index;

a frequency domain assessor including a crash pulse waveform fast fourier transform and a reference waveform fast fourier transform, said frequency domain assessor comparing said crash pulse waveform to said reference waveform to produce a frequency domain index; and

an overall assessor merging said time domain index and said frequency domain index to produce an overall index.

2. A dynamic crash pulse wave assessor as described in claim 1, further comprising:

a second crash pulse waveform integrator; and

a second reference waveform integrator.

3. A dynamic crash pulse wave assessor as described in claim 1, further comprising:

a time frame indexer producing a time frame index by comparing said crash pulse waveform to said reference waveform.

4. A dynamic crash pulse wave assessor as described in claim 3, wherein said time frame index is based upon the percentage of difference between said crash pulse waveform and said reference waveform.

5. A dynamic crash pulse wave assessor as described in claim 1, wherein said frequency domain assessor compares said crash pulse waveform to said reference waveform based upon predefined frequency regions.

6. A dynamic crash pulse wave assessor as described in claim 5, wherein said predetermined frequency regions include first large peak, 0-50 Hz, 50-400 Hz, 220-370 Hz, and 400-600 Hz.

7. A dynamic crash pulse wave assessor as described in claim 1, wherein said frequency domain index is stored in a frequency matrix.

8. A dynamic crash pulse wave assessor as described in claim 1, further comprising:

at least one additional constraint component modifying said overall index.

9. A dynamic crash pulse wave assessor as described in claim 8, wherein said at least one additional constraint component modifies said overall index based upon a zero index accumulation of velocity rating.

10. A dynamic crash pulse wave assessor as described in claim 1, further comprising:

a waveform duration limiter limiting the duration of said crash pulse waveform.

11. A dynamic crash pulse wave assessor as described in claim 1, further comprising:

a treatment guideline utilizing said overall index.