Chapter 1 Requirements for the Hydraulic System of a Flight Control System
1.1 The Development of the Hydraulic System Related to the Flight Control
System
1.1.1 Mission Reliability
1.1.2 Quantitative Flight Safety
1.2 The Interface between the FCS and Hydraulic System
1.2.1 Aircraft Control Surfaces
1.2.2 Interface between Flight Controls and Hydraulic Systems
1.3 Actuation Systems
1.3.1 The Actuation System Powered by Centralized Hydraulic
Supply
1.3.2 The Actuation System Powered by Electrical Supply
1.3.3 Commercial Aircraft Implementation
1.4 Requirement of the FCS to the Hydraulic System
1.4.1 System Safety Requirements
1.4.2 Requirement of Airworthiness
1.4.3 Actuation System Performance Criteria
1.4.4 Actuator Modeling
1.4.5 Basic Parameters of Aircraft Hydraulic System
1.5 Conclusions
References
Chapter 2 Aircraft Hydraulic Systems
2.1 Introduction of Aircraft Hydraulic Systems
2.1. l Basic Structure of a Hydraulic System
2.1.2 Hydraulic System of the Boeing Family
2.1.3 Hydraulic System of the Airbus Family
2.2 Basic Parameters of an Aircraft Hydraulic System 73
2.2.1 Hydraulic Fluid
2.2.2 Hydraulic Pressure
2.2.3 Fluid Temperature
2.2.4 Fluid Flow Rate
2.2.5 Hydraulic Pipes
2.2.6 Pressure Pulsation
2.3 Main Components of the Aircraft Hydraulic System
2.3 1 Aircraft Hydraulic Pump
2.3 2 Power Transfer Unit
2.3 3 Priority Valves
2.3 4 Control Valves
2.3 5 Check Valve
2.3 6 Hydraulic Accumulator
2.3 7 Hydraulic Filter
2.3.8 Hydraulic Reservoir
2.3.9 Fluid Cooling System
2.3.10 Hydraulic Actuator
2.3.11 Redundant HAs
2.4 Proof Test
2.5 Conclusions ]17
References
Chapter 3 Comprehensive Reliability Design of Aircraft Hydraulic System
3.1 Quality and Reliability
3.2 Comprehensive Reliability
3.2.1 Development of Aircraft-related Reliability
3.2.2 Definition of Comprehensive Reliability
3.3 Comprehensive Reliability Theory
3.3.1 Reliability Theory of a Nonrepairable System
3.3.2 Reliability Theory of a Repairable System
3.3.3 Conventional Probability Density Function
3.4 Reliability Design of a Hydraulic System
3.4.1 Reliability Design of Electrical Components
3.4.2 Reliability Design of a Mechanical Product
3.4.3 System Reliability Design
3.5 Design for Maintainability
3.6 Safety Assessment Methods
3.6.1 Failure Modes, Effects, and Criticality Analysis
3.6.2 Fault Tree Analysis
3.6.3 Markov Analysis
3.6.4 Common Cause Analysis
3.7 Comprehensive Reliability Evaluation of a Hydraulic System
3.7.1 Reliability Evaluation of Hydraulic Power Supply System
3.7.2 Safety Requirements and Performance Requirements
of the Actuator
3.7.3 Reliability Evaluation of the Hydraulic Actuation System
3.8 Conclusions
References
Chapter 4 New Technology of Aircraft Hydraulic System
4.1 Introduction
4.2 High-Pressure, High-Power Hydraulic Aircraft Power Supply
Systems
4.2.1 Introduction of High Pressure
4.2.2 High Power
4.2.3 The Problem of High-Pressure Hydraulic Systems
4.3 Intelligent Hydraulic Power Supply System
4.3.1 The Requirement of an Intelligent Control Pump
4.3.2 The Structure of an Intelligent Variable Pump
4.3.3 Information Interaction Analysis of an Intelligent Control
Pump
4.3.4 Control of Intelligent Pump
4.4 New Architecture Based on 2H2E
4.4.1 EHA Principle
4.4.2 EBHA Principle
4.4.3 Dissimilar Redundant Hybrid Actuation System
4.4.4 Electromechanical Principle
4.5 Prognostics and Health Management of Hydraulic Systems
4.5.1 Development of PHM
4.5.2 PHM Structure
4.5.3 PHM Information Acquisition and Fault Feature
Extraction
4.5.4 PHM Hierarchical Intelligent Fault Diagnosis Algorithm
4.5.5 PHM Fault Prediction
4.5.6 Maintenance of PHM
4.5.7 PHM Evaluation
References
Abbreviations
Index
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