speed will affect the back pressure of the gas nozzle, the change of back pressure
will affect the gas velocity and flow rate at the nozzle outlet, thus affecting the
magnitude of the force.
Flight altitude also affects the back pressure of the nozzle, so it also affects the
magnitude of transverse force. The same gas valve opening at different flight altitudes, the gas flow rate and speed, and the magnitude of the force generated are
different.
The ambient temperature will affect the pressure and combustion speed of the
gas generator, and the pressure of the gas generator will increase when the ambient
temperature is high, which will increase the gas velocity and flow rate at the outlet
of the gas nozzle at the same valve opening, thus affecting the magnitude of
transverse force.
The aforementioned factors must be taken into account when designing the
whole system and corresponding measures should be taken. Otherwise, the impact
will be great.
10.4 Process Technology of Gas Steering Engine
In the production of a gas steering engine in many batches, there have been some
major faults such as valve core stopping, piston jamming, and unqualified performance. After many years of process technological research, the causes of failure
were found: the influence of redundancy, the out-of-control gap between the valve
sleeve and the spool, the low quality of the key components, the unreasonable
debugging technical requirements, and so on. After adopting a series of process
technological measures, the performance and reliability of the gas steering engine
are guaranteed.
10.4.1 Structure and Working Principle
Gas steering engine is the actuator of a certain missile control system, which is
mainly composed of noumenon, shell, coil, piston, spool, bushing, valve piece, and
so on (Fig. 10.21).
When working, the positive and negative half-cycles of the width-modulated
square-wave pulse signal with a certain frequency from the autopilot are input into
the two coils of the steering gear, respectively, which alternately generates electromagnetic attractive force in opposite directions to the valve core assembly.
Under the action of electromagnetic attractive force, the valve core assembly moves
reciprocally, and the working medium is directed to both ends of the piston to
promote the reciprocating motion of the piston. The piston drives the rudder surface
to make corresponding deflection through the transmission mechanism. When a
10.3 Device for Changing Missile Motion Direction …
187
will affect the gas velocity and flow rate at the nozzle outlet, thus affecting the
magnitude of the force.
Flight altitude also affects the back pressure of the nozzle, so it also affects the
magnitude of transverse force. The same gas valve opening at different flight altitudes, the gas flow rate and speed, and the magnitude of the force generated are
different.
The ambient temperature will affect the pressure and combustion speed of the
gas generator, and the pressure of the gas generator will increase when the ambient
temperature is high, which will increase the gas velocity and flow rate at the outlet
of the gas nozzle at the same valve opening, thus affecting the magnitude of
transverse force.
The aforementioned factors must be taken into account when designing the
whole system and corresponding measures should be taken. Otherwise, the impact
will be great.
10.4 Process Technology of Gas Steering Engine
In the production of a gas steering engine in many batches, there have been some
major faults such as valve core stopping, piston jamming, and unqualified performance. After many years of process technological research, the causes of failure
were found: the influence of redundancy, the out-of-control gap between the valve
sleeve and the spool, the low quality of the key components, the unreasonable
debugging technical requirements, and so on. After adopting a series of process
technological measures, the performance and reliability of the gas steering engine
are guaranteed.
10.4.1 Structure and Working Principle
Gas steering engine is the actuator of a certain missile control system, which is
mainly composed of noumenon, shell, coil, piston, spool, bushing, valve piece, and
so on (Fig. 10.21).
When working, the positive and negative half-cycles of the width-modulated
square-wave pulse signal with a certain frequency from the autopilot are input into
the two coils of the steering gear, respectively, which alternately generates electromagnetic attractive force in opposite directions to the valve core assembly.
Under the action of electromagnetic attractive force, the valve core assembly moves
reciprocally, and the working medium is directed to both ends of the piston to
promote the reciprocating motion of the piston. The piston drives the rudder surface
to make corresponding deflection through the transmission mechanism. When a
10.3 Device for Changing Missile Motion Direction …
187