9.5 Starting Characteristics of Electronic and Hydraulic
Power Unit
This section analyzes the dynamic characteristics of the electronic and hydraulic
power unit (EHPU), i.e., starting characteristics, establishes a theoretical model
describing the starting characteristics of EHPU, analyzes the main parameters
affecting the starting characteristics, and combines simulation and experiment to
describe effective measures to improve the starting characteristics of EHPU, so as to
achieve the reliable launching and performance indicators of the whole missile.
EHPU is an important core component of missile electro-hydraulic energy
system. It provides hydraulic power for missile-mounted hydraulic system and
power for all kinds of electrical equipment of missile. EHPU is mainly composed of
gas generator, gas pressure regulating valve, gas turbine, generator, hydraulic
pump, and so on. When EHPU works, the electric ignition tube of gas generator
ignites under the action of DC voltage, ignites ignition components, delay grain,
and main grain, produces high-temperature and high-pressure gas with a certain
peak pressure, promotes gas turbine to rotate at a high speed, drives generator and
hydraulic pump to start rapidly after deceleration, and quickly builds hydraulic
pressure in a short time and makes motor frequency meet the starting requirements.
After a certain delay time, the gas regulator valve is connected, and the pressure of
the gas generator is adjusted by the gas regulator valve to the set working pressure.
The gas generator works steadily under this pressure and drives the gas turbine to
run. After the gearbox decelerates, it drives the generator and the hydraulic pump to
work, and outputs the power supply and the hydraulic source.
9.5.1 Description of EHPU Starting Characteristic
EHPU should meet the requirements of steady-state performance indicators, that is,
to output a certain amount of pressure, flow, and voltage, and also to meet the
requirements of starting characteristics. The starting characteristics of EHPU
required by the whole missile are as follows:
(1) Establishment time of hydraulic pressure t p 0:5 s;
(2) Start-up time of power supply t p 0:75 s.
The starting characteristics of electronic and hydraulic power unit, i.e., the
relationship between gas pressure and power frequency and starting time, are shown
in Fig. 9.54.
Starting characteristic index is determined by the control condition of the whole
missile. It is related to whether the whole missile can be launched normally, and it is
also an important criterion to test whether the whole missile system and its
parameters are normal. In the development of EHPU, starting characteristics have
always been an important part of EHPU research. In order to meet the requirements
9.5 Starting Characteristics of Electronic and Hydraulic Power Unit
151
Power Unit
This section analyzes the dynamic characteristics of the electronic and hydraulic
power unit (EHPU), i.e., starting characteristics, establishes a theoretical model
describing the starting characteristics of EHPU, analyzes the main parameters
affecting the starting characteristics, and combines simulation and experiment to
describe effective measures to improve the starting characteristics of EHPU, so as to
achieve the reliable launching and performance indicators of the whole missile.
EHPU is an important core component of missile electro-hydraulic energy
system. It provides hydraulic power for missile-mounted hydraulic system and
power for all kinds of electrical equipment of missile. EHPU is mainly composed of
gas generator, gas pressure regulating valve, gas turbine, generator, hydraulic
pump, and so on. When EHPU works, the electric ignition tube of gas generator
ignites under the action of DC voltage, ignites ignition components, delay grain,
and main grain, produces high-temperature and high-pressure gas with a certain
peak pressure, promotes gas turbine to rotate at a high speed, drives generator and
hydraulic pump to start rapidly after deceleration, and quickly builds hydraulic
pressure in a short time and makes motor frequency meet the starting requirements.
After a certain delay time, the gas regulator valve is connected, and the pressure of
the gas generator is adjusted by the gas regulator valve to the set working pressure.
The gas generator works steadily under this pressure and drives the gas turbine to
run. After the gearbox decelerates, it drives the generator and the hydraulic pump to
work, and outputs the power supply and the hydraulic source.
9.5.1 Description of EHPU Starting Characteristic
EHPU should meet the requirements of steady-state performance indicators, that is,
to output a certain amount of pressure, flow, and voltage, and also to meet the
requirements of starting characteristics. The starting characteristics of EHPU
required by the whole missile are as follows:
(1) Establishment time of hydraulic pressure t p 0:5 s;
(2) Start-up time of power supply t p 0:75 s.
The starting characteristics of electronic and hydraulic power unit, i.e., the
relationship between gas pressure and power frequency and starting time, are shown
in Fig. 9.54.
Starting characteristic index is determined by the control condition of the whole
missile. It is related to whether the whole missile can be launched normally, and it is
also an important criterion to test whether the whole missile system and its
parameters are normal. In the development of EHPU, starting characteristics have
always been an important part of EHPU research. In order to meet the requirements
9.5 Starting Characteristics of Electronic and Hydraulic Power Unit
151