The Experts below are selected from a list of 243990 Experts worldwide ranked by ideXlab platform

Johan Akerman - One of the best experts on this subject based on the ideXlab platform.

Kyo Kobayashi - One of the best experts on this subject based on the ideXlab platform.

  • Autonomous rice Field Operation project in NARO
    2011 IEEE International Conference on Mechatronics and Automation, 2011
    Co-Authors: Yushi Nagasaka, Katsuhiko Tamaki, Koichi Nishiwaki, Yutaka Kikuchi, Masahiro Saito, Kyo Kobayashi
    Abstract:

    We are engaged in research about autonomous rice Field Operation. We have developed an automated tractor, a rice transplanter and a combine harvester. These automated agricultural machineries are guided by a global positioning system (GPS) and a direction sensor such as inertia measurement unit (IMU) using the controller area network (CAN) bus. Because each machine is used for a limited period of time in a year, we plan to share a main control computer and navigation sensors among automated machineries. We expect to deliver autonomous Operation in paddy Field at lower cost and to shorten the development period of each machine. The actuator control command and data communication protocols comply with the ISO 11783. In this paper, we report about project outline and explain about a rice transplanter as an example of automated agricultural machinery.

Yu-hung Chien - One of the best experts on this subject based on the ideXlab platform.

  • Minimizing cost-functions related to both burn-in and Field-Operation under a generalized model
    IEEE Transactions on Reliability, 2004
    Co-Authors: Shey-huei Sheu, Yu-hung Chien
    Abstract:

    Summary and Conclusions-Burn-in is a method used to improve the quality of products. In Field Operation, only those units which survived the burn-in procedure will be used. This paper considers various additive cost structures related to both burn-in procedure and Field Operation under a general failure model. The general failure model includes two types of failures. Type I (minor) failure is removed by a minimal repair, whereas type II failure (catastrophic failure) is removed only by a complete repair (replacement). We introduce the following cost structures: (i) the expenses incurred until the first unit surviving burn-in is obtained; (ii) the minimal repair costs incurred over the life of the unit during Field use; and (iii) either the gain proportional to the mean life of the unit in Field Operation or the expenditure due to replacement at a catastrophic failure during Field Operation. We also assume that, before undergoing the burn-in procedure, the unit has a bathtub-shaped failure rate function with change points t/sub 1/ & t/sub 2/. The optimal burn-in time b/sup */ for minimizing the cost function is demonstrated to be always less than t/sub 1/. Furthermore, a large initial failure rate is shown to justify burn-in, i.e. b/sup */>0. A numerical example is presented.

Yushi Nagasaka - One of the best experts on this subject based on the ideXlab platform.

  • Autonomous rice Field Operation project in NARO
    2011 IEEE International Conference on Mechatronics and Automation, 2011
    Co-Authors: Yushi Nagasaka, Katsuhiko Tamaki, Koichi Nishiwaki, Yutaka Kikuchi, Masahiro Saito, Kyo Kobayashi
    Abstract:

    We are engaged in research about autonomous rice Field Operation. We have developed an automated tractor, a rice transplanter and a combine harvester. These automated agricultural machineries are guided by a global positioning system (GPS) and a direction sensor such as inertia measurement unit (IMU) using the controller area network (CAN) bus. Because each machine is used for a limited period of time in a year, we plan to share a main control computer and navigation sensors among automated machineries. We expect to deliver autonomous Operation in paddy Field at lower cost and to shorten the development period of each machine. The actuator control command and data communication protocols comply with the ISO 11783. In this paper, we report about project outline and explain about a rice transplanter as an example of automated agricultural machinery.

S M Mohseni - One of the best experts on this subject based on the ideXlab platform.