By Chris Fielding, Andras Varga, Samir Bennani, Michiel Selier

In this booklet contemporary result of the GARTEUR (Group for Aeronautical examine and expertise in Europe) motion team FM (AG11) are provided.
The booklet specializes in research recommendations for the flight clearance of hugely augmented aircrafts, together with contributions of 20 eu aeronautical companies similar to nationwide study facilities, Aerospace Industries and Universities. The initiatives and necessities of the economic Clearance method for Flight keep an eye on legislation are offered in addition to classical and especially new research equipment. the various tools are evaluated and in comparison and their capability software to Civil airplane is demonstrated.

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Position or mass for instance, a new calculation is required, and this increases the assessment effort. The procedure to put a grid on the flight envelope and do all calculations at the grid points does not give an answer about the behaviour between these points. The hope is that with a very narrow grid, all critical points will be found - but there is no guarantee and more grid points lead to more calculations. In current practice in industry, only the maximum/minimum values of the uncertainties are considered because otherwise, the necessary analysis effort would increase tremendously and might become unaffordable.

Crossed controls combined with throttle inputs should be used in such a sequence that would most likely generate departure. Handling after failures Depending on the failure, agile manoeuvring might no longer be required and the envelope to be cleared might be reduced. The criteria to be applied remain the same, but the required handling level however might be reduced by one. The transient behaviour during occurrence of a system component failure is checked in Rig (iron bird) tests with real hardware and redundancy management (multi-channel system) included.

This concept of robustness is a generalisation of gain and phase margins used in single-loop analysis, and it will later be used to assess the stability margins of the HIRM+ model. √1+δi12 1+δo1 √ 2 √1+δi22 1+δoi2 √ 2 1−β P∆ 1−β 1−β 1−β P .. .. √1+δiq 2 1+δop √ 2 1−β 1−β .. C .. Fig. 3.

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