Figure 4-6 depicts a plot of the error between the commanded angle sent from the

 OCU and the controller commanded halt error and the actuator halt angle. The controller

 commanded halt error is the error between the commanded angle and the auxiliary track

 angle at the instant that the controller issued the halt command and is recorded from the

 DWT sensor. The actuator halt error is the error between the commanded angle and the

 auxiliary track angle after the track actually stops and is recorded from the plumb

 compass. The average error value returned from the DWT sensor is 0.5 degrees with a

 standard deviation of 0.3, whereas the average error value returned from the plumb

 compass is 3.4 degrees with a standard deviation of 2.2.


 9.U
 8.0
 7.0
 6.0
 5.0

 5.0 -*
 4.0

 3.0
' 2.0
 1.0










 -0.0
 .o Q 10 0 60 ^ 80 90 100 110 120 130 140



 -5.0



 -6.0- Controller Commanded Halt Angle Error
 -7.0--
 Actuator Halt Angle Error
 -8.0--
 -9.0

 Commanded Angle (Degrees)
 Figure 4-6: Controller commanded halt error and actuator halt error versus operator
 commanded angle