Update README.md

README.md

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 # Auto-Docking-Design
 
+# INTRODUCTION
+* This is a design draft for the Robot auto ducking.
+
+
+# COMPONENTS
+* On docking station
+ * IR emitter 
+* On Robot
+ * Two IR receivers 
+
+# BASIC OPERATIONS
+* We will use ROS navigation to command Robot to be 1 or 2 meter in front or the docking station. The Robot's back will be facing to the docking station.
+ * ROS navigation can cause around 30cm position errors
+* Then, two IR receivers will receive IR signals.
+* The Robot will start to to PID control to keep the two IR receiver reading balanced.
+* Until the PMU got the charging flag.
+
+# ISSUES
+* We didn't found proper IR emitter and IR receivers. Keep looking at it. 
+
+