In general, either a position or a velocity command is utilized during teleoperation. However, when teleoperating a free-flying robot in space, it is difficult to ensure the commanded position or velocity because of the specific system dynamics. An acceleration command is much more appropriate. However, it is very difficult to handle the acceleration command for the operator. In this paper, a new predictive display technique named "predictive motion display" is introduced to overcome the problem. The experimental results show that the proposed method reduces both task completion time and collision frequency by 33% and 86%, respectively. In addition, the effectiveness is discussed based on a simple feedback control model

The shortage of human resources on the International Space Station (ISS) is becoming a serious problem. To tackle this problem, smart robot systems that support human activities in space should be developed. In this paper, a new space robot system named "Intra-Vehicular Free-Flyer System (IVFFS)" is proposed. The IVFFS supports not only non-contact but also contact tasks during intra-vehicular activities (IVA). To accomplish such requirements, we introduce a prototype model called "Space Humming Bird" (SHB) which has a variably structured body to satisfy both safety and dexterity requirements. Furthermore, several SHBs can be combined to achieve more complicated tasks. To confirm the feasibility of our concept, a CG simulator is developed. In addition, several operator support techniques are incorporated into the tele-operation system.