Yujiro Shimizu

Designing methods of human interface for supervisory control systems

Abstract In this paper, methods of designing human interfaces for supervisory control systems are proposed. Human factors engineering is applied to hardware systems design, especially layout design, in terms of visual field and visual angle. Cognitive engineering is applied to software systems design, especially the design and evaluation of constructing screens, using the DEMATEL method of analyzing structure. To compensate for the limitations of the design approach above and to optimize supervisory control burdens, an expert system that prompts the operator to change to the right screen at the right time is proposed.

Designing Method of Human Interface for Supervisory Control System

Abstract In this paper, designing methods of human intefrace for supervisory oontrol systems are proposed. For the design of hardware systems, especially the design of layout, human factors engineering was applied in terms of visual field and visual angle. On the other hand, for the design of software systems, especially the design and evaluation of a construction of screens, cognitive engineering was applied with the method of analyzing structure.

Putting Cognitive Work Analysis to Work in Industry Practice: Integration with ISO13407 on Human-Centered Design

This paper investigated how to conduct concrete design for industrial systems to conform to the recently-established Human-Centered Design standard ISO13407 (ISO). Referring to Sanderson et al.s (1999) System Life Cycle (SLC) research, we adopted the Cognitive Work Analysis (CWA) framework as one useful and concrete designing method for industrial systems design to conform to ISO. Based on this idea, we compared three approaches ISO, SLC, and CWA and surveyed the match between ISO and CWA. From this study, we learned that integrating this research would provide great benefits to expand and improve the ISO concept for industrial systems, to give SLC a concrete methodological perspective, and to facilitate CWA technology transfer to practical design. As a result of these benefits, designers for industrial systems can get more structured ways of conducting adequate designs to help workers adapt to any demands and also to conform to ISO. An industry case study with a design example of a pump plant system supported our ideas. Also, we could confirm that much of the required information for ISO could be extracted by CWA. Therefore, the CWA models would not only be useful tools for industrial system designers in all of the SLC stages, but they also would be helpful to make our designs conform with the ISO standard.

The development of a functional fail-safe control for advanced robots

Advanced robots for nuclear power plant maintenance are complex compared with industrial robots, and are subjected to severe conditions during use. The importance of their safety and reliability is increasing. In this paper, the Functional Fail-Safe Control (FFC) is described as a high reliability technology for an Advanced Robot. FFC isolates faults, and maintains the minimum functions of the robot; it uses the remaining potential redundancy of the robot, and minimizes the number of additional parts needed for the robot when faults occur. We will outline the three Reliability Evaluation Principles for Advanced Robots, then define the FFC using these principles. In the proposed FFC, the method of using an amplifier between two shared servo systems, and the method of stacking the degrees of freedom of the robot as a fail-safe device were studied and proven by experiments on the design of the FFC. A new design method is shown which optimizes use of time and work covered. Thus, we have clarified some remaini...