Systems and methods for determining rotary blade track and balance adjustments

Patent metadata

Field	Value
Publication number	US-9638601-B2
Application number	US-201414313719-A
Country	US
Kind code	B2
Filing date	Jun 24, 2014
Priority date	Oct 9, 2013
Publication date	May 2, 2017
Grant date	May 2, 2017

Abstract

A method of adjusting a rotary blade includes receiving performance data for a rotary blade, receiving an adjustment constraint for the rotary blade, defining an adjustment space for alternative adjustment solutions for the rotary blade including a plurality of alternative adjustment solutions, and calculating expected performance for one of the plurality of alternative adjustment solutions. Based on the expected performance of the one of the plurality of alternative adjustment solutions, the method determines whether to calculate expected performance for another of the plurality of alternative adjustment solutions.

First claim

What is claimed is:

1. A method of adjusting track and balance of a rotary blade, comprising:
receiving performance data for a rotary blade;
establishing at least one threshold for the rotary blade;
defining an adjustment solution search tree;
selecting a first adjustment solution from the search tree for evaluation;
evaluating the first adjustment solution using the threshold;
determining whether to evaluate a second adjustment solution from the search tree based on the evaluation of the first adjustment solution;
determining a number of adjustments for the selected first adjustment solution;
comparing the number of adjustments for the selected first adjustment solution with the threshold for the rotary blade;
pruning the first adjustment solution based on the determined number of adjustments and threshold comparison;
selecting a second adjustment solution from the search tree for evaluation; and
adjusting track and balance of the rotary blade according to one of the first adjustment solution and the second adjustment solution.

2. A method as recited in claim 1 , wherein the threshold includes a number of adjustments associated with an adjustment solution for the rotary blade.

3. A method as recited in claim 1 , wherein the threshold includes an expected performance associated with an adjustment solution for the rotary blade.

4. A method as recited in claim 1 , further including receiving mode selection input.

5. A method as recited in claim 4 , wherein the mode selection is selected from a group including meets limits and best ride.

6. A method as recited in claim 1 , wherein defining the adjustment solution search tree includes defining a root node.

7. A method as recited in claim 6 , wherein defining the adjustment search tree includes defining a leaf level with adjustment on and off nodes branched to the root node.

8. A method as recited in claim 7 , wherein defining the adjustment search tree includes defining at least one intervening level having adjustment on and off nodes branched between the leaf nodes and the root node.

9. A method as recited in claim 8 , wherein at least one of the intervening nodes includes a continuous variable for an adjustment value and integer values for an adjustment decision.

10. A method of adjusting track and balance of a rotary blade, comprising:
receiving performance data for a rotary blade;
establishing at least one threshold for the rotary blade;
defining an adjustment solution search tree;
selecting a first adjustment solution from the search tree for evaluation;
evaluating the first adjustment solution using the threshold;
determining whether to evaluate a second adjustment solution from the search tree based on the evaluation of the first adjustment solution;
calculating an expected performance for the first adjustment solution;
comparing the expected performance to one of a performance constraint and a performance threshold;
pruning the first adjustment solution in the event that the calculated expected performance is worse than the performance constraint;
updating the adjustment threshold in the event that the calculated expected performance is better than the performance constraint; and
adjusting track and balance of the rotary blade according to one of the first adjustment solution and the second adjustment solution.

11. A method as recited in claim 10 , further including pruning the first adjustment solution in the event that the calculated expected performance is worse than the performance threshold, and updating the adjustment threshold and/or the performance threshold in the event that the calculated adjustment number and/or expected performance is better than the adjustment threshold and/or the performance threshold.

12. A system for adjusting track and balance of a rotary blade, comprising:
a memory; and
a processor disposed in communication with the memory, wherein the memory has instructions recorded thereon that, when read by the processor cause the processor to:
receive performance data for a rotary blade;
establish at least one threshold for the rotary blade;
define an adjustment solution search tree;
select a first adjustment solution from the search tree for evaluation;
evaluate the first adjustment solution using the threshold;
determine whether to evaluate a second adjustment solution from the search tree based on the evaluation of the first adjustment solution;
determine a number of adjustments for the selected first adjustment solution;
compare the number of adjustments for the selected first adjustment solution with the threshold for the rotary blade;
prune the first adjustment solution based on the determined number of adjustments and threshold comparison;
select a second adjustment solution from the search tree for evaluation; and
adjust track and balance of the rotary blade according one of the first adjustment solution and the second adjustment solution.

13. A system for adjusting track and balance of a rotary blade, comprising:
a memory; and
a processor disposed in communication with the memory, wherein the memory has instructions recorded thereon that, when read by the processor cause the processor to:
receive performance data for a rotary blade;
establish at least one threshold for the rotary blade;
define an adjustment solution search tree;
select a first adjustment solution from the search tree for evaluation;
evaluate the first adjustment solution using the threshold;
determine whether to evaluate a second adjustment solution from the search tree based on the evaluation of the first adjustment solution;
calculate an expected performance for the first adjustment solution;
compare the expected performance to one of a performance constraint and a performance threshold;
prune the first adjustment solution in the event that the calculated expected performance is worse than the performance constraint;
update the adjustment threshold in the event that the calculated expected performance is better than performance constraint; and
adjust track and balance of the rotary blade according to one of the first adjustment solution and the second adjustment solution.

Assignees

• Simmonds Precision Products

Inventors

• Lin Yiqing
• Georgescu Ramona A
• Hiatt Daniel

Classifications

• G01M1/14 Primary

  Determining imbalance (G01M1/30 takes precedence) · CPC title

• B64C27/008 Primary

  Rotors tracking or balancing devices · CPC title