Smoothing out the bumps in curve fitting

There are many design exploration applications where it is important for performance results to match a certain range of values, whether it be from experimental sources or ideal goals. For example, curves for engine torque vs rpm, bushing deflection vs load, or wing lift vs the angle of attack. Quite often though, the baseline curve data can include fluctuations which makes curve fitting more challenging. There can also be portions of the curve where it is far more important that there be a close fit.

Figure 1. Sample Baseline Curves

Figure 1. Sample Baseline Curves

To tackle these challenges and to also streamline the curve creation, HEEDS 2016.04 contains additional curve tools to ensure better results alignment. There are now added abilities to:

  • Weight curve ranges
  • Normalize RMS values
  • Simplify imported curve data selection

Let’s review these capabilities in detail to show how they can help.  Continue reading