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Nobuaki ENDO,Toshiya OZAKI,Naoki ANDO 한국해운물류학회 2014 The Asian journal of shipping and Logistics Vol.30 No.3
When a firm undertakes foreign direct investment, it must determine the level of ownership in its foreign subsidiary. This study examines the determinants of the ownership strategy of a Japanese logistics firm from the perspective of international business studies (IB). The study focuses on firm-level factors, including “contributed assets” for shaping firm-specific advantage which a parent firm possesses, “complementary assets” which such firm may need to acquire in a foreign country, and international experience. It also analyzes country-level factors including the institutional difference between a home country and a host country. The study conducts a Tobit regression analysis on the relationship between such factors and the equity ownership level in a foreign subsidiary based on the data-sets of Japanese logistics firms.
Application of Model Predictive Control to Polishing Robot for Pushing Operation
Nobuaki Endo,Takashi Yoshimi,Koichiro Hayashi,Hiroki Murakami 제어로봇시스템학회 2022 제어로봇시스템학회 국제학술대회 논문집 Vol.2022 No.11
Much of the polishing work is done manually by skilled workers. It is not easy to teach robots to perform the detailed work of theirs and to configure and operate an appropriate control system to achieve this, and automation of this process has been delayed. Polishing is performed by pressing a rotating tool against the workpiece to be machined. To achieve this motion, PID control is used in the controllers of many robots. However, to determine the appropriate control gain, it is necessary to repeatedly adjust the control gain according to the processing target and processing conditions. The purpose of this research is to introduce Model Predictive Control (MPC) as a new control system for polishing robots. MPC is a control that predicts control output using a model of the control target. Therefore, we considered the target force value could be achieved without changing the MPC parameters when the force condition, a machining condition, is changed. In this paper, control block diagrams were created in MATLAB Simulink to apply MPC. The block diagram was then mounted on the actual machine to check whether it could be pressed with appropriate force, and the differences from PID were evaluated.