design of steering gear, antenna, and missile power grid. If the auxiliary
energy of the whole missile is utilized comprehensively, the three groups of
curves need to be fitted again to form the total power spectrum and total
work. In order to study the authenticity of typical working conditions of
missiles and the adaptability of control execution system, foreign countries
specialize in launching control execution system test vehicle (CTV).
3. Choice of Constant Power Energy and Variable Power Energy. The energy
of the control execution system must match the control trajectory condition.
The meaning of “matching” usually refers to “tolerance”, and “coincidence”
as a special case is “adaptation”. Corresponding to inclusiveness and
overlap are “constant power energy” and “variable power energy”. Usually,
for small missiles, constant power energy is mostly used, such as gas
execution system of Chaparral, Sam 7, which is simple, applicable, and low
cost. For large missiles, priority should be given to variable power energy
sources adapted to the variation of ballistic conditions, such as Patriot
Battery Electric Variable Pump Hydraulic Execution System, Javelin Gas
Motor Variable Pump Hydraulic Execution System, and Sea Sparrow
Nitrogen Booster Accumulator Hydraulic Execution System. But in fact,
many large projectiles still use constant power energy, such as Sam 2, 6
series air-conditioning execution system and Aspide gas turbine quantitative
pump hydraulic execution system. The reason is closely related to historical
inheritance and design style, besides considering ballistic conditions and
load cycle percentage.
4. Consideration of Excretory Energy and Recycling Energy. As far as we
know, the gas energy, the cold energy, and the power supply used by
electric steering engines (such as Chaparral, Sam 7), air-conditioned steering engines (such as Sam 2, 6), and electric steering engines (such as French
Rattlesnake, American Tail Thorn) are all excretory, and the working
medium is not recycled after used. Hydraulic energy used in hydraulic
steering gear can be divided into noncyclic (discharge) and cyclic. The
former is basically a gas (gas or cold) turbocharged accumulator, while the
latter is of different types with different primary energy sources, such as gas
turbine quantitative pump with solid propellant, gas motor variable pump
with liquid unit agent (flow controllable), and motor variable pump with
chemical battery. Their applicability is related to preferred working belts as
shown in Fig. 9.12.
5. Isolation of energy interconnection between common source and comprehensive utilization. In common source and comprehensive utilization,
effective technical measures must be taken to restrict “isolation” of “intersection”. Aspide is a typical example of the integrated utilization of common source and missile-borne energy (Fig. 9.16). In order to prevent the
“intersection” of antenna hydraulic energy when the hydraulic control
execution system works with large flow, a current limiting valve is set at the
source junction to control and isolate the flow into the control execution
system, so as to ensure that the antenna energy of the seeker has sufficient
9.1 Electro-Hydraulic Servo Control Technology of Aircraft Gas Turbine Pump
89
energy of the whole missile is utilized comprehensively, the three groups of
curves need to be fitted again to form the total power spectrum and total
work. In order to study the authenticity of typical working conditions of
missiles and the adaptability of control execution system, foreign countries
specialize in launching control execution system test vehicle (CTV).
3. Choice of Constant Power Energy and Variable Power Energy. The energy
of the control execution system must match the control trajectory condition.
The meaning of “matching” usually refers to “tolerance”, and “coincidence”
as a special case is “adaptation”. Corresponding to inclusiveness and
overlap are “constant power energy” and “variable power energy”. Usually,
for small missiles, constant power energy is mostly used, such as gas
execution system of Chaparral, Sam 7, which is simple, applicable, and low
cost. For large missiles, priority should be given to variable power energy
sources adapted to the variation of ballistic conditions, such as Patriot
Battery Electric Variable Pump Hydraulic Execution System, Javelin Gas
Motor Variable Pump Hydraulic Execution System, and Sea Sparrow
Nitrogen Booster Accumulator Hydraulic Execution System. But in fact,
many large projectiles still use constant power energy, such as Sam 2, 6
series air-conditioning execution system and Aspide gas turbine quantitative
pump hydraulic execution system. The reason is closely related to historical
inheritance and design style, besides considering ballistic conditions and
load cycle percentage.
4. Consideration of Excretory Energy and Recycling Energy. As far as we
know, the gas energy, the cold energy, and the power supply used by
electric steering engines (such as Chaparral, Sam 7), air-conditioned steering engines (such as Sam 2, 6), and electric steering engines (such as French
Rattlesnake, American Tail Thorn) are all excretory, and the working
medium is not recycled after used. Hydraulic energy used in hydraulic
steering gear can be divided into noncyclic (discharge) and cyclic. The
former is basically a gas (gas or cold) turbocharged accumulator, while the
latter is of different types with different primary energy sources, such as gas
turbine quantitative pump with solid propellant, gas motor variable pump
with liquid unit agent (flow controllable), and motor variable pump with
chemical battery. Their applicability is related to preferred working belts as
shown in Fig. 9.12.
5. Isolation of energy interconnection between common source and comprehensive utilization. In common source and comprehensive utilization,
effective technical measures must be taken to restrict “isolation” of “intersection”. Aspide is a typical example of the integrated utilization of common source and missile-borne energy (Fig. 9.16). In order to prevent the
“intersection” of antenna hydraulic energy when the hydraulic control
execution system works with large flow, a current limiting valve is set at the
source junction to control and isolate the flow into the control execution
system, so as to ensure that the antenna energy of the seeker has sufficient
9.1 Electro-Hydraulic Servo Control Technology of Aircraft Gas Turbine Pump
89