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bradyj7
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Hello,
I am reading a paper in which the author describes how he scales the velocity profile of a car.
He is doing this so that he can compare the velocity profiles of cars.
This is an extract from the text:
The first methodology consisted of evaluating the similarities between velocity profiles by computing the differences between their velocity profiles. This is a direct method, since the velocity profiles are considered in their entirety. The aim was not to quantify the links between different velocity profiles, but simply to highlight the similarities that might be present. To apply this methodology, it was first necessary to scale the velocity profiles and to perform a linear interpolation (step of 0.1 s) since all velocity profiles do not all have the same duration and the same time resolution. This was achieved by using the ECE part of the NEDC cycle as a reference. Consequently, once scaled, all the cycles had the same duration of 195 s. A comparison of the original and scaled NEDC cycles is illustrated in Figure 1.
https://dl.dropbox.com/u/54057365/All/scaleNEDC.JPG
My question is, if I had the time and velocity values of the "original NEDC" velocity profile, how would you actually scale it to achieve the "scaled NEDC". How would you scale the numbers to fit in the 195 second time frame?
Thank you
Here is the data in an excel sheet:https://dl.dropbox.com/u/54057365/All/NEDC.xlsx
I am reading a paper in which the author describes how he scales the velocity profile of a car.
He is doing this so that he can compare the velocity profiles of cars.
This is an extract from the text:
The first methodology consisted of evaluating the similarities between velocity profiles by computing the differences between their velocity profiles. This is a direct method, since the velocity profiles are considered in their entirety. The aim was not to quantify the links between different velocity profiles, but simply to highlight the similarities that might be present. To apply this methodology, it was first necessary to scale the velocity profiles and to perform a linear interpolation (step of 0.1 s) since all velocity profiles do not all have the same duration and the same time resolution. This was achieved by using the ECE part of the NEDC cycle as a reference. Consequently, once scaled, all the cycles had the same duration of 195 s. A comparison of the original and scaled NEDC cycles is illustrated in Figure 1.
https://dl.dropbox.com/u/54057365/All/scaleNEDC.JPG
My question is, if I had the time and velocity values of the "original NEDC" velocity profile, how would you actually scale it to achieve the "scaled NEDC". How would you scale the numbers to fit in the 195 second time frame?
Thank you
Here is the data in an excel sheet:https://dl.dropbox.com/u/54057365/All/NEDC.xlsx
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