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by Yaobao Yin
Electro Hydraulic Control Theory and Its Applications Under Extreme Environment
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Title page
Table of Contents
Copyright
Preface
Abstract
Chapter 1. Overview
1.1. Electrohydraulic control technology
1.2. Aircraft electrohydraulic servo control technology
1.3. History and evolvement process of the electrohydraulic servo valve
1.4. Research significance of electrohydraulic servo control system under extreme environmental conditions
Chapter 2. Hydraulic Fluid and Electrohydraulic Servo Valves
2.1. Hydraulic fluid in electrohydraulic servo systems
2.2. Principle and mathematic model of electrohydraulic servo valves
Chapter 3. Jet-Pipe Electrohydraulic Servo Valve
3.1. Overview
3.2. Fundamentals and structure of jet-pipe servo valve
3.3. Terminology and definition of electrohydraulic servo valve
3.4. Overseas patents of the jet-pipe servo valve
3.5. Applications of jet-pipe servo valve on aircraft
3.6. Conclusions
Chapter 4. Aircraft Hydraulic Power System
4.1. Outline of aircraft hydraulic energy systems
4.2. Hydraulic system of the Airbus A320
4.3. Thermal analysis of aircraft hydraulic systems and oil temperature control technology
4.4. Conclusions
Chapter 5. Aircraft Electrohydraulic Servo Control Technology
5.1. Electrohydraulic control technology
5.2. Elastic O-type ring sealing technology
5.3. Aircraft electrohydraulic servo technology
5.4. Control actuation system of anti-aircraft missile
5.5. Auxiliary power unit of anti-aircraft missile
5.6. Aircraft gas turbine pump hydraulic power application technology
5.7. Power-matching design of hydraulic rudder system
Chapter 6. Flow-Matching Control of Asymmetrical Hydraulic Valve and Asymmetrical Hydraulic Cylinder
6.1. Mathematical model and pressure characteristics of hydraulic servo mechanism with zero-lap valve controlled asymmetrical cylinder
6.2. Hydraulic control system speed gain characteristics
6.3. Natural frequency of hydraulic cylinders and pneumatic cylinders
Chapter 7. Pressure Characteristics of Symmetrical Uneven Underlap Hydraulic Slide Valves
7.1. Pressure characteristics of symmetrical uneven hydraulic slide valves
7.2. Pressure and leakage at null position
7.3. Application examples
Chapter 8. Single Stage Overflow Valve in Aerocraft Hydraulic Control Systems
8.1. Characteristics and working principle of single stage overflow valve with balanced piston and fixed orifice
8.2. Working point and basic characteristics
8.3. Influence of structural parameters on dynamic characteristics
8.4. Valve characteristics in vibration environment
8.5. Influence of operation point of overflow valve on frequency of missile electrohydraulic energy system
Chapter 9. Hydraulic Pressure Reducing Valve for Aircraft
9.1. Structure characteristics and working principle
9.2. Mathematical model
9.3. Theoretical characteristics and their influencing factors
Chapter 10. Hydraulic Components in Extreme Temperature Environments
10.1. Aircraft hydraulic accumulator and gas cylinder in extreme temperature environments
10.2. Electrohydraulic servo valve in extreme temperature environments
Chapter 11. Electrohydraulic Servo Valve in Vibration and Impact Environment
11.1. Mathematical model of electrohydraulic servo valve in vibration and impact
11.2. Electrohydraulic servo valve in unit step acceleration environment
11.3. Electrohydraulic servo valve in unit pulse acceleration environment
11.4. Electrohydraulic servo valve under vibration condition
11.5. Conclusions
Chapter 12. Electrohydraulic Servo Valves in Centrifugal Environments
12.1. Acceleration composition theorem with circular transport motion
12.2. Electrohydraulic servo valves in a centrifugal environment of uniformly circular motion
12.3. Electrohydraulic servo valves in a centrifugal environment of uniformly accelerated circular motion
12.4. Null bias of electrohydraulic servo valves in a centrifugal environment
12.5. Performance of electro hydraulic servo valves in a centrifugal environment
12.6. Layout measures of electrohydraulic servo valves in vibration, impact and centrifugal environments
Chapter 13. Optimal Design of the Electrohydraulic Servo Valve
13.1. Optimal design of the electrohydraulic servo valve based on amplitude margin
13.2. Optimal design of the torque motor integrated stiffness of the electrohydraulic servo valve
13.3. Electrohydraulic servo valve with compensating throttle
13.4. Asymmetrical nozzle flapper type single-stage electrohydraulic servo valve
13.5. Asymmetry of the nozzle flapper valve of the two-stage electrohydraulic servo valve with force feedback
Chapter 14. Marine Hydraulic Technology
14.1. Hydraulic system of ship pitch propeller
14.2. Ship accumulator-pump hydraulic energy system
14.3. Dynamic pressure damper technology
14.4. Marine hydraulic system screw joint technology
14.5. Hydraulic system wave absorber
14.6. Submarine seawater hydraulic system
Index
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