Active Spanwise Lift Control : a Distributed Parameter Approach.

Cover -- Half Title -- Title Page -- Copyright Page -- Contents -- Preface -- List of Tables -- List of Figures -- Acknowledgements -- Chapter 1: Introduction -- 1.1 Motivation: The Quest for Increasingly Efficient Aircraft -- 1.2 Literature Review on Active Load Alleviation -- 1.3 Proposed Approach -- 1.4 Fundamental assumptions -- 1.5 Unique features of this book -- 1.6 Book Organization -- Chapter 2: Unsteady Aerodynamic Modeling of a Multiflap Wing -- 2.1 Quasi-Steady Aerodynamic Model -- 2.2 Unsteady Lifting-Line Theory (ULLT) -- 2.3 Unsteady Vortex Lattice Method (UVLM) -- 2.4 Verification of Aerodynamic Models -- 2.5 Assumptions and Constraints -- Chapter 3: Review of Model Order Reduction Methods -- 3.1 Introduction -- 3.2 Proper Orthogonal Decomposition: Fundamentals -- 3.3 Balanced Proper Orthogonal Decomposition -- 3.4 Eigensystem Realization Algorithm (ERA) -- 3.5 Example: Application to a Finite Element Model of a Cantilever Beam -- 3.6 Chapter Summary -- Chapter 4: Modal Identification of Aerodynamic Systems -- 4.1 Modal Identification from UVLM -- 4.2 Limits in Identifiability -- 4.3 Modal Identification from ULLT -- 4.4 Physical Interpretation of Aerodynamic Modes -- 4.5 Effects of Varying Wing Planform on the Mode Shapes and Eigenvalues -- 4.6 Chapter Summary -- Chapter 5: Spatial Control of Spanwise Lift Distribution -- 5.1 Model Output Expansion into Mode Shapes -- 5.2 Threshold for Model Truncation -- 5.3 Spatial-Temporal Controller Synthesis -- 5.4 Shape Control Problem -- 5.5 Gust Load Alleviation Problem -- 5.6 Gust Load Alleviation Problem with Gust Estimation -- 5.7 Chapter Summary -- 5.8 Future Developments of This Methodology -- Appendix A -- References -- Index -- Supporting Materials.

Active Spanwise Lift Control presents a novel approach to tackle the gust alleviation problem. Traditional approaches typically attempt to suppress the structural response at discrete points of the wing using only the conventional control surfaces (aileron, elevator, rudder), resulting in limited control authority, high-bandwidth actuator requirements, and necessity of gust field measurements ahead of the aircraft. In this book, the authors directly address the spanwise behavior of aerodynamic loads, as this is what should be primarily controlled.

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Electronic reproduction. Ann Arbor, Michigan : ProQuest Ebook Central, 2024. Available via World Wide Web. Access may be limited to ProQuest Ebook Central affiliated libraries.