1. Institute of Electronics and Computer Science, 14 Dzerbenes St., LV-1006 Riga, Latvia
2. Deptartament of Mechatronics, Robotics and Digital Manufacturing, Vilnius Gediminas Technical University, LT-10105 Vilnius, Lithuania
3. Department of Mechanical Engineering, National Taiwan University of Science and Technology (NTUST), Taipei 10607, Taiwan
4. Intelligent Manufacturing Innovation Center, National Taiwan University of Science and Technology (NTUST), Taipei 10607, Taiwan