Funding for this research was provided by:
Natural Science Foundation of Hebei Province (F2017202243)
Natural Science Foundation of Tianjin City (18JCTPJC54700)
State Key Laboratory of Robotics and System (SKLRS-2017-KF-15)
Science and Technology on Space Intelligent Control Laboratory (ZDSYS-2017-08)
Article History
Received: 27 January 2019
Revised: 8 April 2019
Accepted: 18 July 2019
First Online: 27 August 2019