{HEAD ~ The individual input control signal} for {TAIL ~ each power source} is obtained by summing the error signal with the individual signal representing the variable component 
for
{ HEAD ~ The individual input control signal } for { TAIL ~ each power source } is obtained by summing the error signal with the individual signal representing the variable component
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH