{TAIL ~ An adder} generates a final control signal by adding {HEAD ~ the first and the second control signals} and provides the final control signal to the plant, wherein the final control signal is used to control the plant 
{ TAIL ~ An adder } generates a final control signal by adding { HEAD ~ the first and the second control signals } and provides the final control signal to the plant , wherein the final control signal is used to control the plant
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH