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