Aircraft Instrumentation And Systems

Aircraft Instrumentation And Systems
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Aircraft Instrumentation And Systems

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Publisher: IK International
ISBN: 9789380578354
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About this eBook

Preface This book is intended for the undergraduates studying Aircraft Instrumentation and Avionic Systems. This happens to be a core subject of various branches of engineering such as Instrumentation Technology, Electronics Instrumentation Engineering, Aeronautical Engineering as well as Aerospace Engineering. One of the prime objectives of this book is to present a contemporary approach to the subject, stressing the importance of basic principles, clarity and objectivity. The complex systems are described in simpler terms for students to comprehend the basic principles and operation, without losing sight in details. The authors have taught the subject for several years to the undergraduate students and thus have written the book in a style to match with their needs. At the end of each chapter, review questions have been included for practice and self-study. It is worth noting that most of the aircraft technology has remained, somewhat stagnant for the past 50 years. For example, jet engines rely on gas turbines developed in late 1930s aircraft structures have reached a stable and saturated level. However, signi cant advances are still made in instrumentation systems and avionics with the primary objective of reducing the pilot s workload, as well as increasing the safety of ight to remarkably high levels. The other advantage of using semiconductor VLSI technology has resulted in signi cantly reducing the size and weight of equipment. The cockpit no longer looks like conventional old clock-type instruments on the other hand, they appear more like a computer workstation now. This book emphasises on covering the contemporary developments rather than dwelling more on outdated systems. For example, attitude measurements were traditionally done using mechanical gyros, which have now been almost been replaced by ring-laser or bre optic gyros in modern aircraft. We have included latest advances in strap-down angular sensors using the RLG and FOG. Similarly air data computers using microprocessor technology have replaced the older all-pneumatic conventional indicators such as air speed indicator, altimeter, vertical speed indicator, which have certain serious limitations. The chapters are arranged in such a way as to cover the subject from simple topics to more complex and sophisticated systems. The book starts with a broad overview of the basics of aircraft, instruments and cockpit layout in modern aircraft. Chapters 2 to 7 deal with the conventional ight instruments as well as advanced ight instruments, and their location in the main instrument panel. Chapter 8 describes modern electronic ight instrument system. Navigation system, whose primary function is to y the aircraft from point A to point B on the surface of earth, is covered in chapter 9. Basics of ight control system, autopilot and auto-throttle are discussed in Chapter 10. Modern aircraft
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PREFACE
uses many primary and secondary types of radar such as radio altimeter, weather radar, surveillance radar, etc basics of airborne radars are presented in Chapter 11. Flight management systems have been developed to increase the situational awareness and reduce the pilot s workload remarkably, without compromising the safety of ight Chapter 12 is concerned with the basic principles and operation of ight management systems. Chapter 13 explains the basics of aircraft communication and addressing systems using satellite links, as well as future air navigation systems. Whenever an aircraft is involved in an incident accident, it will be necessary to nd out the cause and take corrective measures by learning from the past mistakes, so that such incidents do not recur the data stored in black-boxes are used for reconstructing the ight during the nal critical moments of an accident Chapter 14 introduces the fundamentals of modern black-boxes or ight data recorders. Chapter 15 covers many safety, warning and alerting systems, which include altitude alerting system, speed Mach warning systems, ground proximity warning systems, and collision avoidance systems. These systems have greatly reduced the number of accidents since their introduction in 1980s. Aerial warfare is not restricted to ammunitions and missiles, but uses electromagnetic waves for surveillance, protection and attack Chapter 16 brie y introduces electronics warfare techniques. We have tried to present the details on the subjects covered in the book, without undue cross-referencing we hope that this feature as well as a comprehensive index and a detailed glossary of terms will enhance the usability of the book. While writing this book, we have received strong encouragement from Prof. H. N. Shivashankar, Director R. N. Shetty Institute of Technology, and Prof. K. R. Suresh, Principal of Bangalore Institute of Technology. The book was exhaustively reviewed by Mr. N. N. Murthy of Moog Controls for which we are extremely thankful to him. The authors had the privilege of discussing certain subtle physics points with Prof. N. Prabhu of Purdue University, USA., and we are extremely grateful to