Downloaded from https://www.everyspec.com ADS-79D-HDBK C.5.2.1 Example of the implementation of an Integrated NDI method. An integrated NDI system can be considered as an alternative to current NDI methods. It has potential to improve the probability of detection over established NDI methods. The benefits of implementing an integrated NDI system into structures includes detecting cracking in hard to access areas, eliminating complex and time- intensive procedures, reducing human factors and improving the inspection techniques from faulty detection using hand held inspection tools. An integrated NDI system consists of a suite of sensors designed to monitor for damage of structural components.
The system could take advantage of sensors already installed on the aircraft or new ones may need to be integrated. The following framework illustrates the process for selecting, qualifying and validating an integrated NDI system for Army Aviation. 1. Identify structural failure modes and failure locations: a. Review fielded data and design requirement to identify component(s) of interest. b. Review part service history and determine the potential failure modes. c. Perform detailed structural analysis to confirm failure mode(s) and identify critical location(s). 2. Identify and Select Integrated NDI System a. Specify sensor requirement through the information collected in Step 1 b.
Identify candidate sensor(s) and sensor system and perform sensor screen test or study for further down-selection c. Perform optimization study to determine the most suitable sensor or sensor network d. Perform hardware integration assessment. Analysis should determine if current on-board systems sufficiently meet the system requirements. If not, analysis should fully define integration requirements to include power requirements. e. Develop requirements and technical path for data transmission. f. Evaluation of efficiency and accuracy of the software for health monitoring of in-service structures 3. Qualification/Validation a.
Qualification of the system for environment and electromagnetic compatibility will use the latest version of MIL-STD-810 and MIL-STD-461 as standards, respectively. b. Sensor Requirement – Identification of sensor requirement requires detail evaluation of structure, review of its history, and existing maintenance procedures to have better understanding of the failure mode. c. Capability Development/Demonstration – 65