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Data Analysis Fundamentals: Throttle Histogram

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Throttle Histogram


00:00 - Since the throttle pedal position defines the amount of torque the engine delivers, analysing the throttle pedal use during a lap can give us a good metric to analyse the way the driver is using the available engine power and how well balanced the chassis is.
00:15 All things being equal, the more throttle the driver is able to apply during a lap, the faster the car will be and the lower the lap time.
00:23 At the same time, the better balanced the chassis is, the easier it will accept throttle during corner exit.
00:30 The two specific pieces of data we're interested in here are the percentage of time the driver is at full throttle and the average throttle position during a lap.
00:39 Any time we see these two values increase, we can generally expect an improvement in the lap time although of course there are considerations that may come into play.
00:49 So throttle application alone can't be used as a sole indicator of performance.
00:54 The full throttle percentage can be derived from what's referred to as a histogram which breaks up our data from a full lap into what we call bins.
01:04 A bin is just a range of throttle movement and every sample from the full lap that spans that particular range will be placed into that bin.
01:12 A simple histogram for the throttle might then encompass 10 separate bins spanning from 0 to 100% throttle opening in 10% increments.
01:22 The average throttle percentage can be displayed directly on the time/distance graph of the throttle trace rather than from your histogram.
01:29 And your analysis software should provide an option to display the minimum, maximum and average values for each channel within the time/distance graph.
01:38 Alternatively this could also be derived from a channel report which we'll discuss shortly.