In an early stage of product development and design, functions and performances are required to a product have been often defined without sufficient consideration of user’s sensitivity requirements. This design way occur rework to improve Kansei quality of the product in the evaluation phase after designing. In this paper, utilizing the system model we describe the relation between Kansei requirements and components to design a keyboard. The described system model shared among stakeholders in charge of design is expected to bring traceability among system requirements and verification results without occurrence of rework. First, we define the system requirements of key stroke operation based on the user's needs for a keyboard derived from the evaluation grid method, and select the evaluation words for the sensory test of the keyboard. Next, we describe system behavior occurred by the user's key stroke operation and the physical characteristics using the sequence diagram to clarify the temporal association of the Kansei requirements related to the key stroke operation. Furthermore, by performing multiple regression analysis for past several keyboards, the relation of the physical characteristics of the keyboards to the sensory evaluation is derived. The application examples show the possibility of estimation for the sensory evaluation to perform trade study between Kansei requirements and performance requirements.

When operating a robot arm capable of multi-degree of freedom movement, it is not easy for a person without specialized knowledge to operate using a conventional operation device with many buttons. On the other hand, there is an operation method in which the robot performs the same movement as the operator moves the arm, and it is easy to operate. Legs are capable of multi-degree of freedom movement as well as arms, and therefore it is considered that there is a possibility that robots can be manipulated by the motion of the leg. In this research, we studied an operation method of three dimensional position of a device such as a robot by leg motion of the operator. In order to operate by leg motion, accurate movement is required for the leg. Therefore, we experimentally investigated and clarified how accurately the operator's leg moves as intended during operation and how the intended motion and the actual motion differ from each other. In consideration of the difference, an operation method for calculating an intended operation from the actual leg motion of the operator was constructed. Finally, verification experiments were carried out using the proposed operation method, and its effectiveness was shown.

Baseball pitchers can throw various types of breaking balls such as curve, slider, forkball or split-finger fastball and knuckleball. Therefore, for batting practice, a baseball ball launching device which can launch various breaking balls is required. However, most of the commercially available devices can only launch breaking balls whose rotation axis is perpendicular to the traveling direction. In this research, a baseball ball launching device which can launch a breaking ball whose rotation axis is parallel to the traveling direction is refined so that breaking balls with arbitrary rotation axis can be realized. The rotation axis of the breaking balls launched by the refined device are observed by using a high-speed camera. Through trajectory observation of experiments, the reproducibilities of the braking balls launched by the refined device are confirmed.