The first sensor 18 is referred to as the collocated sensor, since it is installed within {TAIL ~ the realm} or {HEAD ~ region} of influence of the actuator 14 
The first sensor 18 is referred to as the collocated sensor , since it is installed within { TAIL ~ the realm } or { HEAD ~ region } of influence of the actuator 14
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH