College of Mechanical & Electronic Engineering and Automatization, National University of Defense Technology, Changsha, China. liuwei@hupo.org.cn <liuwei@hupo.org.cn>|College of Mechanical & Electronic Engineering and Automatization, National University of Defense Technology, Changsha, China. liuwei@hupo.org.cn <liuwei@hupo.org.cn>|College of Mechanical & Electronic Engineering and Automatization, National University of Defense Technology, Changsha, China. liuwei@hupo.org.cn <liuwei@hupo.org.cn>|College of Mechanical & Electronic Engineering and Automatization, National University of Defense Technology, Changsha, China. liuwei@hupo.org.cn <liuwei@hupo.org.cn>|College of Mechanical & Electronic Engineering and Automatization, National University of Defense Technology, Changsha, China. liuwei@hupo.org.cn <liuwei@hupo.org.cn>