A control system adjusts {HEAD ~ the airflow parameter} of the motor based on the motor speed and {TAIL ~ environmental conditions} such as light and motion 
based on
A control system adjusts { HEAD ~ the airflow parameter } of the motor based on the motor speed and { TAIL ~ environmental conditions } such as light and motion
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL REL OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH