Advanced Techniques for Clearance of Flight Control Laws

In this book recent results of the GARTEUR (Group for Aeronautical Research and Technology in Europe) Action Group FM (AG11) are presented.
The book focuses on analysis techniques for the flight clearance of highly augmented aircrafts, including contributions of 20 European aeronautical organisations such as National Research Centers, Aerospace Industries and Universities. The tasks and requirements of the Industrial Clearance Process for Flight Control Laws are presented as well as classical and particularly new analysis methods. The different methods are evaluated and compared and their potential application to Civil Aircraft is demonstrated.

Inhalt

Industrial Clearance of Flight Control Laws.- Tasks and Needs of the Industrial Clearance Process.- Tutorial on Analysis Methods.- The Structured Singular Value and ?-Analysis.- The ?-Gap Metric and the Generalised Stability Margin.- A Polynomial-Based Clearance Method.- Bifurcation and Continuation Method.- Optimisation-Based Clearance.- The HIRM+RIDE Benchmark.- The HIRM+ Flight Dynamics Model.- The RIDE Controller.- Selected Clearance Criteria for HIRM+RIDE.- LFT Modelling of Uncertainty Models.- An Overview of System Modelling in LFT Form.- Physical Approach to LFT Modelling.- Uncertainty Bands Approach to LFT Modelling.- Flatness Approach to LFT Modelling.- Analysis Results.- Baseline Solution.- ?-Analysis of Linear Stability Criteria.- ?-Analysis of Stability Margin Criteria.- ?-Gap Analysis of Stability Margin Criteria.- Polynomial-Based Clearance of Eigenvalue Criteria.- Bifurcation-Based Clearance of Linear Stability Criteria.- Optimisation-Based Clearance: The Linear Analysis.- Optimisation-Based Clearance: The Nonlinear Analysis.- Conclusions and Recommendations.- Industrial Evaluation.- Considerations for Clearance of Civil Transport Aircraft.- Concluding Remarks.