A liquid crystal-based light valve system with automatic color correction. As the resultant high pressure force acting on the pivoting pin is reduced, the movement of the displacement control ring is smoother, reducing undesirable hysteresis, the wear on the pin is reduced and the additional force required to move the ring to vary the volumetric displacement of the pump is less than would otherwise be needed, allowing the related control mechanisms to be smaller. When an actuator member is rotated, the gear rotates synchronously therewith so as to move the movable seat on the driving rod. The vulnerability of the network is determined based on the threat responses of the devices.