Tuned indexer stall detection and controller.

Change-Id: I93332461253457730b3051c3e96735b314f1405d
diff --git a/y2017/control_loops/superstructure/indexer/indexer.h b/y2017/control_loops/superstructure/indexer/indexer.h
index 5c1cc1b..9d71eed 100644
--- a/y2017/control_loops/superstructure/indexer/indexer.h
+++ b/y2017/control_loops/superstructure/indexer/indexer.h
@@ -39,7 +39,7 @@
 
   // Returns true if the indexer is stuck.
   bool IsStuck() const;
-  double StuckRatio() const;
+  double StuckVoltage() const;
 
   // Executes the control loop for a cycle.
   void Update(bool disabled);