change speed min value generated by keyboard
change speed min value generated by keyboard

TurtleRover/Turtle-Rover-Mission-Control,TurtleRover/Turtle-Rover-Mission-Control,TurtleRover/Turtle-Rover-Mission-Control,TurtleRover/Turtle-Rover-Mission-Control,TurtleRover/Turtle-Rover-Mission-Control,TurtleRover/Turtle-Rover-Mission-Control