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The overarching objective of this project is to establish the needs and develop a breadboard demonstration of an in-situ health monitoring technique for Carbon Fibre Overwrapped Pressure Vessels (COPVs) for both high pressure and low pressure (hazardous) propellants.
The overarching objective is broken down into a list of specific objectives:
To design selected sensor system / systems into breadboard demonstrator several issues must be resolved:
This work is done using surrogate specimen with the same or very similar material properties as the COPV’s overwrap. Then, the sensor system design is incorporated into overall conceptual design and tested for the application in the COPV.
The main benefits of the monitoring COPV by structure health systems are:
The selected sensor / sensor system is designed into the demonstrator. The design includes: selection of appropriate type of sensors, design of the sensors distribution on/into the pressure tank and adjustment of the signal acquisition parameters.
Honeywell provides its experience and capabilities in development of SHM systems based on ultrasonic guided waves using small and low weight PZT actuators / sensors. It means:
CTU is responsible for research on optical fibres and FBG sensors:
The work is divided into three phases in sequential order:
The outputs of the three phases cover all technical notes and hardware required in the state of work.
The project was completed.
All the defined research objectives were met. The breadboard demonstrator proved feasibility of the proposed manufacturing process and a series of impact tests verified detection capabilities of the sensors network. It was demonstrated that both invetigated SHM technologies (FBG and PZT) are able to detect structural defects on the tested composite overwrap.