ASSESSMENT OF RESEARCH NEEDS FOR WIND TURBINE ROTOR MATERIALS TECHNOLOGY -- Copyright -- PREFACE -- Contents -- Executive Summary -- RESEARCH RECOMMENDATIONS -- MATERIALS -- DESIGN -- MANUFACTURING -- 1 INTRODUCTION -- SCOPE AND CONTENT -- WIND-DRIVEN POWER PLANTS -- WHY MATERIALS KNOWLEDGE IS CRITICAL -- THE EVOLUTION OF WIND-DRIVEN POWER PLANTS -- THE PRINCIPAL COMPONENT: WIND TURBINES -- POWER CONVERSION EQUATIONS -- THE WIND ENVIRONMENT -- FATIGUE CYCLE ACCUMULATION -- REFERENCES AND BIBLIOGRAPHY -- 2 STRUCTURAL LOADING CHARACTERISTICS -- LOAD CHARACTERIZATION -- BLADE FAILURE EXPERIENCE -- LESSONS FROM HELICOPTER EXPERIENCE -- RECOMMENDATIONS -- REFERENCES AND BIBLIOGRAPHY -- 3 MATERIALS PROPERTIES AND LIFE PREDICTION -- FIBERS -- MATRIX MATERIALS -- E-GLASS/PLASTIC COMPOSITES -- FATIGUE LIFE PREDICTION -- TOUGHNESS CONSIDERATIONS -- WOOD/EPOXY COMPOSITES -- RECOMMENDATIONS -- REFERENCES AND BIBLIOGRAPHY -- 4 WIND TURBINE ROTOR DESIGN ISSUES -- AIRFOIL EVOLUTION -- AERODYNAMIC TIP BRAKES -- BLADE ROOT RETENTION -- Glass-Reinforced Plastic (Grp) Blade Roots -- WOOD/EPOXY BLADE ROOTS -- BLADE JOINING -- BLADE DESIGN CONSIDERATIONS -- Fiberglass Blades -- Wood/Epoxy Blades -- RECOMMENDATIONS -- Grp -- Wood/Epoxy -- Generic -- REFERENCES AND BIBLIOGRAPHY -- 5 MANUFACTURING PROCESSES FOR ROTOR BLADES -- CURRENT MANUFACTURING PROCESSES -- Blade Root End Concepts -- Manufacturing Methods Influence Blade Life -- Matrix Stress Versus Fatigue -- HELICOPTER ROTOR BLADE DESIGN AND PROCESSING -- MANUFACTURING PROCESSES APPLICABLE TO WIND TURBINE BLADES -- Resin Transfer Molding (RTM) -- Pultrusion -- Fiber Placement -- ROOT END DESIGN FOR PRODUCIBILITY -- MANUFACTURING RECOMMENDATIONS -- REFERENCES AND BIBLIOGRAPHY -- 6 ACTIVE CONTROL IN WIND TURBINES -- THE CONTROL PROBLEM FOR WIND TURBINES -- RECENT TRENDS IN CONTROL SYSTEM THEORY.

EXISTING CONTROL TECHNOLOGY FOR WIND TURBINES -- ROLE OF CONTROL TECHNOLOGY IN THE WIND POWER INDUSTRY -- REFERENCES AND BIBLIOGRAPHY -- 7 CONCLUSIONS AND RECOMMENDATIONS -- CONCLUSIONS -- RESEARCH RECOMMENDATIONS -- APPENDIX A STATEMENT OF TASK -- OBJECTIVES -- TASKS TO BE PERFORMED -- ASSESSMENT OUTCOME -- APPENDIX B COMMITTEE MEETINGS AND ACTIVITIES.