Servo Ventilator 300/300A
Introduction
E382 E380E 061 01 03 01
Siemens-Elema AB
19
1
Expiratory feedback control system
17
The expiratory feedback control system
uses cascade control. It is active only during
expiration time in all modes. It applies
PRESSURE regulation.
• D
ESIRED
VALUE
is the
PEEP
LEVEL
signal from
the
PANEL
SECTION
(according to front panel
setting)
• A
CTUAL
VALUE
is the
EXP
.
PRESSURE
signal
from the expiratory
PRESSURE
TRANSDUCER
.
• The actuating signal from the
PEEP
PID
CONTROL
block is the
POSITION
REF
. signal
used as
DESIRED
VALUE
for the
POSITION
PD
CONTROL
.
• A
CTUAL
VALUE
is the
EXP
.
VALVE
POSITION
signal
from the
POSITION
SENSOR
in the
EXPIRATORY
VALVE
.
• The actuating signal from the
POSITION
PD
CONTROL
block is the
EXP
.
VALVE
CURRENT
REF
.
signal used as
DESIRED
VALUE
for the
CURRENT
CONTROL
&
CURRENT
POWER
block.
• The
ACTUAL
CURRENT
VALUE
is an internal
feedback signal used in the
CURRENT
CONTROL
block.
• The actuating signal from the output stage
of the
CURRENT
CONTROL
&
CURRENT
POWER
is a
pulse train with pulse width modulation
used to actuate the
EXPIRATORY
VALVE
SOLENOID
which generates a certain
opening of the
EXPIRATORY
VALVE
.
POSITION
SENSOR
EXPIRATORY
VALVE
CONTROLLED SYSTEM
VALVE
SOLENOID
PRESSURE
TRANSDUCER
PEEP PID
CONTROL
CURRENT
CONTROL
&
CURRENT
POWER
POSITION PD
CONTROL
DESIRED EXPIRATORY
PRESSURE VALUE
EXP. VALVE
CURRENT REF.
PRESSURE CONTROL
ACTUAL POSITION VALUE
POSITION
REF.
ACTUAL
EXPIRATORY
PRESSURE
VALUE
PEEP LEVEL
EXP. VALVE POSITION
ACTUAL CURRENT VALUE
DESIRED
CURRENT
VALUE
DESIRED
POSITION
VALUE
EXP.
PRESSURE
300-A1
1E
Содержание Servo Ventilator 300
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