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