5Charitkhuan C, Bhufipanyo J, Choomuang R. FPGA implementation of closed - loop control system for small - sized RoboCup[ J]. Application and research of computer,2006 ( 12 ) : 1 - 6.
6Nawratil G. New performance indices for 6R robots[J]. Mechanism and machine theory,2007,42 ( 11 ), 1499 - 1511.