In order to displace the element {HEAD ~ the actuator} is impinged upon by {TAIL ~ a control voltage}  
In order to displace the element { HEAD ~ the actuator } is impinged upon by { TAIL ~ a control voltage }
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH