Methods and systems for helicopter rotor blade balancing

1. A method comprising:

receiving by a computer density data of a rotor blade, wherein the density data was acquired by a scanner;

processing by a computer the density data to produce a density map of the rotor blade; and

merging by a computer the density map with a three-dimensional model of the rotor blade to define a relative density distribution model of the rotor blade, wherein the three-dimensional model includes a finite plurality of volumes within an outer contour of the rotor blade.

2. The method of claim 1 , further comprising:

prior to the receiving and the processing, scanning by a scanner the rotor blade to acquire the density data.

3. The method of claim 2 , wherein the scanning includes scanning the rotor blade at a rate of at least 15 millimeters of the length of the rotor blade per minute.

4. The method of claim 2 , wherein the scanning includes scanning at a resolution in the range of 10-10,000 microns.

5. The method of claim 1 , wherein the merging includes assigning a density value to each volume of the finite plurality of volumes, wherein the density values represent the relative densities between the finite plurality of volumes.

6. The method of claim 1 , further comprising:

merging by a computer the relative density model with measured weight data of the rotor blade to define a relative mass distribution model of the rotor blade.

7. The method of claim 6 , further comprising:

merging by a computer the relative mass distribution model of the rotor blade with rotational considerations to define a dynamic model of the rotor blade.

8. The method of claim 7 , further comprising:

accessing by a computer a database of prior dynamic models of prior rotor blades and comparing the dynamic model of the rotor blade to the prior dynamic models; and

based at least in part on the comparing, predicting by a computer a proposed weight adjustment to the rotor blade to match a desired weight distribution.

9. The method of claim 8 , further comprising:

adjusting the balance of the rotor blade based at least in part on the predicting to have an updated rotor blade.

10. The method of claim 9 , further comprising:

updating by a computer the dynamic model of the rotor blade with measured dynamic rotational data of the updated rotor blade to define an updated dynamic model of the rotor blade.

11. The method of claim 6 , further comprising:

predicting by a computer dynamic flight data of the rotor blade based at least in part on the relative mass distribution of the rotor blade.

12. The method of claim 6 , further comprising:

comparing by a computer the relative mass distribution model of the rotor blade with pre-existing mass distribution models of prior tested rotor blades; and

based on the comparing, determining by a computer predicted dynamic characteristics of the rotor blade.

13. The method of claim 6 , further comprising:

comparing by a computer the relative mass distribution model of the rotor blade with pre-existing mass distribution models of prior tested rotor blades; and

based on the comparing, determining by a computer a proposed updated weight distribution for the rotor blade to match a weight distribution of a master blade.

14. The method of claim 13 , further comprising:

predicting by a computer predicted dynamic flight data of the rotor blade having the updated weight distribution based at least in part on the relative mass distribution of the rotor blade.

15. The method of claim 13 , further comprising:

based on the determining, outputting by a computer instructions for adjusting the weight distribution of the rotor blade to match the weight distribution of the master blade; and

adjusting the weight balance of the rotor blade to match the weight distribution of the master blade.

16. A system comprising:

a computer configured to perform the method of claim 1 ; and

a scanner configured to acquire the density data of the rotor blade.

17. The method of claim 1 , wherein the finite plurality of volumes includes one or more volumes corresponding to critical regions of the rotor blade and one or more volumes corresponding to non-critical regions of the rotor blade, and wherein the one or more volumes corresponding to critical regions of the rotor blade are smaller than the one or more volumes corresponding to non-critical regions of the rotor blade.

18. A method comprising:

accessing with a computer a database, wherein the database includes dynamic models that are based on relative mass distribution models of rotor blades, wherein the relative mass distribution models are based at least in part on data acquired from scanning the rotor blades;

based on the accessing, determining by a computer a proposed weight distribution of a rotor blade to be balanced.

19. The method of claim 18 , wherein the determining is based at least in part on simulating by a computer dynamic flight data of the rotor blade to be balanced.

20. A method comprising:

processing by a computer density data of a rotor blade to produce a density map of the rotor blade; and

prior to the processing, scanning by a scanner the rotor blade to acquire the density data, wherein the scanning includes scanning at a resolution in the range of 10-10,000 microns.