Ergonomic analysis of the effects of a telehandler's active suspended cab on whole body vibration level and operator comfort |
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| Affiliation: | 1. Institute for Agricultural and Earthmoving Machines (IMAMOTER), National Research Council (CNR) of Italy, Strada delle Cacce, 73, 10135, Torino, Italy;2. Department of Life Sciences and Systems Biology, University of Turin, Via Accademia Albertina, 13, 10123, Torino, Italy;1. AICRP on Farm Implements and Machinery, Central Institute of Agricultural Engineering, Nabi-bagh, Bhopal 462 038, India;2. Agricultural and Food Engineering Department, Indian Institute of Technology, Kharagpur 721 302, India;1. Department of Animal Science, Food Science and Animal Science Faculty, Ramin Agricultural and Natural Resources University, P.O. Box: 6341773637, Ahwaz, Iran .;2. Agricultural, Medical and Industrial Research School, Nuclear Science & Technology Research Institute, P.O. Box: 31485-498, Karaj, Iran;1. Department of Mechanics, Faculty of Civil Engineering, Czech Technical University in Prague, Thákurova 7, 166 29 Prague 6, Czech Republic;2. Centre of Excellence IT4Innovations, VŠB-TU Ostrava, 17. listopadu 15/2172, 708 33 Ostrava-Poruba, Czech Republic;1. Department of Food and Energy Systems Science, Graduate School of Bio-Applications and Systems Engineering, Tokyo University of Agriculture and Technology, Japan;2. Department of Environmental and Agricultural Engineering, Institute of Agricultural Science, Tokyo University of Agriculture and Technology, Japan;1. Polytechnic Institute of Coimbra, Coimbra Institute of Engineering, Mechanical Engineering Department, Rua Pedro Nunes- Quinta da Nora, 3030-199, Coimbra, Portugal;2. CEMUC, Department of Mechanical Engineering, University of Coimbra, Pinhal de Marrocos, Pólo II, Rua Luis Reis Santos, 3020-788, Coimbra, Portugal |
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| Abstract: | IntroductionExposure to whole body vibration (WBV) is one of the most important risks for musculoskeletal disorders (MSDs). The objective of the study was to investigate whether an active cab suspension system fitted on a telehandler was effective in reducing WBV and in improving comfort.MethodSixteen male healthy professional operators drove a telehandler on a 100 m ISO 5008 smooth track at two different speeds (5 and 12 kph) with activated and deactivated cab suspension system. Adopting an ergonomic approach, different aspects of the human-machine interaction were analyzed: 1) vibration transmissibility, 2) subjective ratings of general comfort and local body discomfort, and 3) anthropometric characteristics of the users.ResultsA series of ANCOVAs showed that the suspension system was effective in reducing WBV at both speeds but did not affect the perception of comfort by the operators. Moreover, individuals with higher Body Mass Index (BMI) experienced more comfort. Some neck/shoulder and lumbar complaints and perceived hard jolts seemed to remain even when the system was activated. No correlations were found between objective and subjective measures.Practical applicationsResults suggest that the operators, given their wide range of physical variability, may need more adjustable or customizable WBV reduction systems. |
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| Keywords: | Active suspension Anthropometric variability Comfort Telehandler Whole-body vibration transmissibility |
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