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Strain Sensor’s Network for Low-Velocity Impact Location Estimation on Carbon Reinforced Fiber Plastic Structures: Part-I


Affiliations
1 Advanced Composites Division, National Aerospace Laboratories, Bangalore, India 560 017, India

In this work, we have investigated the strain response (angular/spatial) from fiber Bragg grating (FBG) sensor & resistance strain gauge (RSG) sensors bonded to the composite structure due to the projectile low velocity impact (LVI). The number of sensor & its orientating has been optimized based on such experimental data and designed an optimum sensor network for faithful LVI detection. In order to study the efficacy of the sensor network, an impact localization algorithm based on peak strain amplitude from the sensor bonded to the structure was used in this study. Further the detection efficiency of the algorithm has been improved using weighted average value around the peak amplitude of strain experienced by the sensor. We found that for the high energy (~35 J) LVI the maximum distance error (Euclidian distance) was 50 mm for 80% of total trail case. Furthermore, we have developed and compared the relative performance of the algorithm cited in the literature, will be presented in PART-II of the same Journal.
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  • Strain Sensor’s Network for Low-Velocity Impact Location Estimation on Carbon Reinforced Fiber Plastic Structures: Part-I

Abstract Views: 144  | 

Authors

Augustin M J
Advanced Composites Division, National Aerospace Laboratories, Bangalore, India 560 017, India
Amitabha Datta
Advanced Composites Division, National Aerospace Laboratories, Bangalore, India 560 017, India
Nitesh Gupta
Advanced Composites Division, National Aerospace Laboratories, Bangalore, India 560 017, India
Viswamurthy SR
Advanced Composites Division, National Aerospace Laboratories, Bangalore, India 560 017, India
Kotresh Gaddikeri
Advanced Composites Division, National Aerospace Laboratories, Bangalore, India 560 017, India
Ramesh Sundaram
Advanced Composites Division, National Aerospace Laboratories, Bangalore, India 560 017, India

Abstract


In this work, we have investigated the strain response (angular/spatial) from fiber Bragg grating (FBG) sensor & resistance strain gauge (RSG) sensors bonded to the composite structure due to the projectile low velocity impact (LVI). The number of sensor & its orientating has been optimized based on such experimental data and designed an optimum sensor network for faithful LVI detection. In order to study the efficacy of the sensor network, an impact localization algorithm based on peak strain amplitude from the sensor bonded to the structure was used in this study. Further the detection efficiency of the algorithm has been improved using weighted average value around the peak amplitude of strain experienced by the sensor. We found that for the high energy (~35 J) LVI the maximum distance error (Euclidian distance) was 50 mm for 80% of total trail case. Furthermore, we have developed and compared the relative performance of the algorithm cited in the literature, will be presented in PART-II of the same Journal.