In {TAIL ~ an embodiment} of the present invention, {HEAD ~ the control system} comprises a load measuring device, a summing junction, a logic control unit and a process controller that encompasses a motor controller and a brake controller 
In { TAIL ~ an embodiment } of the present invention , { HEAD ~ the control system } comprises a load measuring device , a summing junction , a logic control unit and a process controller that encompasses a motor controller and a brake controller
REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH 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 OTH OTH OTH OTH OTH OTH