The second sensor 20 is referred to as the nearly collocated sensor, and is installed near the actuator 14 but outside {HEAD ~ its realm} of {TAIL ~ direct influence} 
of
The second sensor 20 is referred to as the nearly collocated sensor , and is installed near the actuator 14 but outside { HEAD ~ its realm } of { TAIL ~ direct influence }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL