9.1.3 Technical Characteristics of Electric-Hydraulic Servo
System for Aircraft
Electro-hydraulic servo technology has developed rapidly since the mid-1960s, and
matured gradually in the early twenty-first century. It has been widely used in
various industrial fields. Aeronautics and astronautics have a high demand for
electro-hydraulic servo technology, which generally reflects the professional level
of electro-hydraulic servo control technology. The development of
electro-hydraulic servo technology involves many aspects, such as system and
component design, material, testing, and manufacturing technology. In general,
high power, high voltage, high temperature, high speed, high reliability, and
mechanical–electrical integration have become a main line throughout the development process, and have achieved historic results. The development requirements
of aeronautics and astronautics electro-hydraulic servo technology and the technical
characteristics of civil industry applications are analyzed as follows.
9.1.3.1 High Power
Aerospace vehicle and modern production equipment have remarkable characteristics of large capacity, high efficiency, and high reliability. The electro-hydraulic
servo system, as a transmission and control device, is developing toward high
power accordingly. Take American Civil Aviation DC Series Aircraft (Douglas,
then merged into McDonald Douglas), for example, such as DC-6 (1950), DC-7
(1955), DC-8 (1960), DC-10 (1971, 300 seat class), the power of its hydraulic
system is 19; 24; 67; 340 kW, which has increased 17 times in 20 years. In the field
of aerospace, the power of hydraulic system is increasing rapidly. For example, the
power of V-2 Saturn rocket (1940) hydraulic system is 0:42 kW, while the power of
Saturn-V rocket (1969) first-stage hydraulic system is 462 kW. Table 9.1 lists some
examples of the application of high-power levels in hydraulic system.
Table 9.1 Examples of high-power application of hydraulic systems
System
Power/kW
Substage hydraulic system of Saturn-V rocket in USA
462
Swing hydraulic system of spacecraft main engine
447
Hydraulic system of B-1B bomber
746
Hydraulic system of space shuttle takeoff-separation overload simulator
1,749
Hydraulic system of 30,000-ton steel tube mill
746
9.1 Electro-Hydraulic Servo Control Technology of Aircraft Gas Turbine Pump
65
System for Aircraft
Electro-hydraulic servo technology has developed rapidly since the mid-1960s, and
matured gradually in the early twenty-first century. It has been widely used in
various industrial fields. Aeronautics and astronautics have a high demand for
electro-hydraulic servo technology, which generally reflects the professional level
of electro-hydraulic servo control technology. The development of
electro-hydraulic servo technology involves many aspects, such as system and
component design, material, testing, and manufacturing technology. In general,
high power, high voltage, high temperature, high speed, high reliability, and
mechanical–electrical integration have become a main line throughout the development process, and have achieved historic results. The development requirements
of aeronautics and astronautics electro-hydraulic servo technology and the technical
characteristics of civil industry applications are analyzed as follows.
9.1.3.1 High Power
Aerospace vehicle and modern production equipment have remarkable characteristics of large capacity, high efficiency, and high reliability. The electro-hydraulic
servo system, as a transmission and control device, is developing toward high
power accordingly. Take American Civil Aviation DC Series Aircraft (Douglas,
then merged into McDonald Douglas), for example, such as DC-6 (1950), DC-7
(1955), DC-8 (1960), DC-10 (1971, 300 seat class), the power of its hydraulic
system is 19; 24; 67; 340 kW, which has increased 17 times in 20 years. In the field
of aerospace, the power of hydraulic system is increasing rapidly. For example, the
power of V-2 Saturn rocket (1940) hydraulic system is 0:42 kW, while the power of
Saturn-V rocket (1969) first-stage hydraulic system is 462 kW. Table 9.1 lists some
examples of the application of high-power levels in hydraulic system.
Table 9.1 Examples of high-power application of hydraulic systems
System
Power/kW
Substage hydraulic system of Saturn-V rocket in USA
462
Swing hydraulic system of spacecraft main engine
447
Hydraulic system of B-1B bomber
746
Hydraulic system of space shuttle takeoff-separation overload simulator
1,749
Hydraulic system of 30,000-ton steel tube mill
746
9.1 Electro-Hydraulic Servo Control Technology of Aircraft Gas Turbine Pump
65