Concept and Objectives:
The HIRF SE research project has the goal of providing the aeronautics industry with a framework which can be used during the development phase to mitigate the EM aspects. In addition it will provide a considerable reduction in the certification/qualification tests required on air vehicle. The HIRF SE main objectives can be summarized by the two followings items: • Full validated and integrated solutions to model, to simulate numerically and to test air vehicles for EM aspects during design and certification; • To build (from past and ongoing works) an integrated approach with an open and evolutionary architecture. The HIRF Synthetic Environment expected results can be summarized by the following items: • Capability to deal with the increased use of composite materials and structures by the airframe industry. The HIRF SE framework will include the most advanced computational models for the numerical simulation of the EM characteristics and performance of composite materials. • Capability to deal with the complete internal and external electromagnetic environment (present and foreseen). The HIRF SE tool will be able to simulate a wide spread typology and number of EM (internal and external) interference sources. • To take advantage of a large community to develop and issue a work on modelling of excellence. The result will be to develop and issue a work of excellence on EM modelling by gathering a large team of scientists, academic and industrial engineers, cooperating to build a reference tool of their own. • A developed methodology/tool well recognized inside the civil aviation community in accordance with certification bodies. Taking into account the HIRF Synthetic Environment main objectives and the following expected results it is possible to affirm the HIRF SE project addresses the scope of work described in the FP7 Work Programme.
HIRF Results in brief:
Electromagnetic (EM) interference can wreak havoc with critical systems and radios aboard aircraft. An EU-funded project focused on minimising the risk of interference, whether it originates from outside or within the aircraft.
In the current air vehicle life cycle, experimental verification is set at the end of the development phase, when air vehicles are already built and just before being released to the market. However, in case equipment and sub-systems are affected by mutual EM interactions or cannot correctly operate when subjected to external EM disturbances, re-work costs may be high and the delivery time scale may considerably increase in the event of redesign or retesting.
To help with this, the EU-funded project ‘HIRF synthetic environment’ (HIRF SE) elaborated the methodology to develop a technology that should mitigate EM interference at the early stages of aircraft development. In addition, it would provide a considerable reduction in the certification/qualification tests required on air vehicles.
To deal with the increased use of composite materials and structures by the aeronautics industry, the HIRF SE framework included the most advanced computational models for the numerical simulation of EM characteristics and performance. Furthermore, it was able to simulate a widespread typology and number of EM (internal and external) interference sources.
Advanced computational tools were also used to calculate the internal and external fields of EM interference in low- and high-frequency scenarios (from 10 kHz to 3 GHz and from 3 to 40 GHz). With the open and evolutionary architecture of the framework, many specialised programmes were able to work together to study the EM behaviour.
The correct operation of the framework was verified and validated by comparing data from real tests on small and medium air vehicles and pre-existing data for large air vehicles. Furthermore, all tools that were integrated inside the HIRF SE framework were assessed through comparisons with results from measurements.
HIRF SE helps reduce the delivery time scales of future air vehicles and systems by decreasing time required for physical testing, possible redesign and re-testing. Developing and validating virtual models are key issues to reduce the number of development tests required to achieve air vehicles certification and to obtain improved results.
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