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Improved operator comfort and off-road capability through pendulum arm technology |
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| Institution: | 1. Skogforsk, Dag Hammarskjölds väg 36A, S-751 83 Uppsala, Sweden;2. eXtractor AB, Höglundagatan 3, S-821 34 Bollnäs, Sweden;1. The School of Public Health, University of Haifa, Haifa, Israel;2. A. Mishali Counseling Services, Israel;3. Israel Dairy Board, Yehud, Israel;1. Department of Fusion Plasma Physics, School of Electrical Engineering, KTH Royal Institute of Technology, Stockholm, Sweden;2. Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong;1. Istituto di Ricerca sugli Ecosistemi Terrestri - IRET, Consiglio Nazionale delle Ricerche - CNR, Via Madonna del Piano 10, 50019 Sesto Fiorentino, Firenze, Italy;2. Dipartimento di Scienze e Tecnologie Agrarie, Alimentari, Ambientali e Forestali (DAGRI), Università di Firenze, P. le delle Cascine 28, 50144 Firenze, Italy;1. School of Mechanical Engineering, Hunan University of Science and Technology, Xiangtan 411201, China;2. State Key Laboratory of Advanced Design and Manufacture for Vehicle Body, Hunan University, Changsha 410082, China;1. School of Industrial Engineering and Management, KTH Royal Institute of Technology, Brinellvägen 83, SE-10044 Stockholm, Sweden;2. Swedish Forestry Research Institute, Skogforsk, Uppsala Science Park, S-751 83 Uppsala, Sweden |
| Abstract: | The Nordic forest industry requires just-in-time wood deliveries. Operations must continue regardless of season, weather and terrain. Soil compaction and deep ruts must be avoided while providing high performance and a reasonable working environment for operators.The Xt28 pendulum arm forwarder is a full-size concept forwarder with six hydrostatic propelled wheels on pendulum arms built on a three-piece frame connected with two articulation joints. The Xt28 concept machine was tested according to Skogforsk standard machine tests. Rut depth test focused on soil interaction where rut depth was measured related to number of passes. Machine dynamics were measured using standardized test track with focus on operator comfort.The project proved the potential of pendulum arm technology in off-road transportation. Automatic pendulum arm levelling, equalized ground pressure between wheels and improved operator comfort through reducing adverse vibrations and roll angles, simultaneously reducing dynamic forces transferred to the forest floor. Pendulum arm technology improves travel speed in adverse terrain, providing unparalleled side slope capability and enhanced productivity. |
| Keywords: | Off-road Pendulum arms Concept machine Forestry Operator environment Vibrations Soil impact Rutting 3D"} {"#name":"keyword" "$":{"id":"k0050"} "$$":[{"#name":"text" "_":"three-dimensional ADAMS"} {"#name":"keyword" "$":{"id":"k0060"} "$$":[{"#name":"text" "_":"Multibody Dynamics Simulation Software Bodas"} {"#name":"keyword" "$":{"id":"k0070"} "$$":[{"#name":"text" "_":"Bosch Rexroth Control System IMU"} {"#name":"keyword" "$":{"id":"k0080"} "$$":[{"#name":"text" "_":"Inertial Measurement Unit ISO"} {"#name":"keyword" "$":{"id":"k0090"} "$$":[{"#name":"text" "_":"International Organization for Standardization kN"} {"#name":"keyword" "$":{"id":"k0100"} "$$":[{"#name":"text" "_":"kilonewton m/s"} {"#name":"keyword" "$":{"id":"k0110"} "$$":[{"#name":"text" "_":"meter per second RMS"} {"#name":"keyword" "$":{"id":"k0120"} "$$":[{"#name":"text" "_":"Root Mean Square rpm"} {"#name":"keyword" "$":{"id":"k0130"} "$$":[{"#name":"text" "_":"revolutions per minute Xt28"} {"#name":"keyword" "$":{"id":"k0140"} "$$":[{"#name":"text" "_":"nomenclature for the tested pendulum arm forwarder concept machine |
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