著者

大川 真弥 滝田 好宏 伊達 央

出版者

一般社団法人 日本機械学会

雑誌

日本機械学会論文集 (ISSN:21879761)

巻号頁・発行日

vol.80, no.812, pp.TRANS0076-TRANS0076, 2014 (Released:2014-04-25)

参考文献数

12

被引用文献数

1 3

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This paper proposes a brush-cutting robot which can cut high weeds and grass automatically by hand-held brush-cutter sold in hardware store. The robot vehicle is constructed with a center articulated body, a manipulating mechanism of the brush-cutter, motor controller and sensors for self-localization. In order to get its own position continuously, two Laser Range Finders (LRF), a GPS campus and odometry encoder for each wheel are installed. Authors proposed Sensor Steering Mechanism (SSM) for the lateral guided vehicle with steering mechanism. This robot is applied SSM for the center articulated body to follow the way point line on the 2-D map. The map for self-localization is constructed with a 0.1m by 0.1m grid that is measured by the 3-D LRF. The experimental set up was developed and installed in the control program and then autonomous mowing was tested, leading to the results of running and mowing in the quadrangle of the No. 4 building of science and engineering at National Defense Academy. As a result, the proposed system achieved an error of 0.2m or less for the way point line following performance. The developed brush-cutting robot successfully completed the work without untreated area by providing an appropriate overlap by the result.

著者

伊達 央 大川 真弥 滝田 好宏 菊地 惇

出版者

一般社団法人 日本機械学会

雑誌

日本機械学会論文集C編 (ISSN:18848354)

巻号頁・発行日

vol.79, no.806, pp.3389-3398, 2013 (Released:2013-10-25)

参考文献数

11

被引用文献数

2 11

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This paper presents the technique for improving the accuracy and reliability of an autonomous mobile robot localization. Localization based on 2D LIDAR is not always satisfactory due to occlusion. Use of 3D LIDAR improves the reliability by greater field of view. However, lack of 3D objects around the robot may result in poor matching between the observation and the 3D map. Even in this case, the different brightness of the ground surface helps localization. In this paper, we propose an efficient expression of 3D map by considering of LIDAR intensity. Experiment result shows successful localization in a trail through outdoor open grass fields.

著者

滝田 好宏 伊達 央 大川 真弥

出版者

一般社団法人 日本機械学会

雑誌

日本機械学会論文集 (ISSN:21879761)

巻号頁・発行日

vol.80, no.812, pp.TRANS0069-TRANS0069, 2014 (Released:2014-04-25)

参考文献数

19

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This paper proposes SSM (Sensor Steering Mechanism) for a lateral guided vehicle with an articulated body. Authors demonstrated the simple lateral guiding method SSM for the front wheel steer type, the reverse phase four-wheel steer type and the rear wheel steer type vehicle. SSM presents the stable lateral guiding performance for automated vehicle which follows a straight and curved path created by guideway. This paper proposes a simplified SSM to remove the following servo system for the camera rotation. The simplified SSM is applied to 1/25 scaled articulated dump truck which is developed by the previous paper. The stability of the simplified SSM is discussed. Experimental and simulation results show the stable moving and the performance of proposed method.