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