Template:Weibull++ Equation Fit Solver Example

Weibull++ Equation Fit Solver Example

Equation Fit Solver can be used to do linear and nonlinear regression. Assume an engineer collected the following degradation data.

From the physical mechanism, the engineer knows the degradation path follows the following equation:
 * $$y=a+bx+c\ln (x)$$

where:


 * x is the time


 * y is the degradation reading.

This above model is not a standard degradation model in Webul++. It can be solved using the equation fit solver.

Solution:

Step 1: Create an Equation Fit Solver Folio



Step 2: Enter the above data into the folio

Step 3: Enter the user defined degradation function at the control panel and name it “My Degradation Equation”.

Step 4: Calculate it and the results are:

Step 5: You can use the “Calculate Y given X” to make prediction. For example, the predicted Y value at X=100 is 176.2424.



'Step 6: The plot of the fitted model and the observed values are given as: