Figure 3-23.--LYDT servo loop.

Figure 3-23.--LYDT servo loop.

Figure 3-24.--Stabilization circuits, block diagram.

The LVDT loop is quite similar to the gyro feedback

are only generated when the LVDT has an output and

loop, only the sensor is changed Figure 3-23 shows that

these are amplified and drive the output to zero.

the LVDT is mechanically connected to the actuator to

In operation, any voltages measured in the servo

sense its position pot. The feedback signal from the

loops are small and are proportional to the system

LVDT is connected to the error detector. The LVDT has

error.

as its input either zero (stab-lock) or a signal from the

The complete system servo feedback loop (single

manual position pot. With the manual position pot

channel) is shown in figure 3-24. This incorporates both

switched out of the circuit, the input to the error detector

the gyro and stab-lock loops and the switching between

is zero (ground). The LVDT is adjusted so its output is

them.

zero when the platform top is level to its base, thus errors

3-17