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Driver environment in snow groomers: an analysis and recommendations to improvement
2002 (English)Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

This master thesis should be seen as a guideline to improve the driver environment of the snow groomers that Leitner design. In 2002 Leitner will present a new snow groomer, the LH600. The current production of snow groomers at Leitner is the LH500, which is a design that was made ten years ago. For the season 2003, the LH600 will be ready to deliver and the production of the LH500 will then cease. Most of the empirical data that have been collected are from the LH500, that to be able to compare the design with the new model LH600. To insure that most of the factors that affect a driver are included the analysis, the driver have been analyzed from the moment that he puts his hand or foot on the machine until that he leaves the machine. The work environment was examined on the snow groomer drivers at Åre ski resort, Sweden. Much of the materials in the literature studies are based on reports from the work in a forest machine. This because there are very little literature written about snow groomers, and also the fact that the work in a forest machine are quite similar to that in a snow groomer. Which means that drivers often works in darkness and at night. They also work alone and in any weather condition. The terrain is varying and they use control levers to maneuver the machine. The drivers are also exposed to vibrations and noise. The Leitner snow groomers diffrentiates from competitours by having the driver placed in the middle of the cabin. The advantage with that position is that the driver gets a symmentric and good view from the cabin. The disadvantage is that the ingress of the cabin gets more difficult. The Leitner machines also have a passenger seat on both sides of the driver. This means that the space for the dashboard are limited. Vibration test of the LH500 shows that the body is exposed too quite high vibrations. According to a questionnaire and interviewed drivers the respons of the control lever in the LH500 is poor. It is also difficult to keep the windshields free from ice and snow in the LH500. A lighting test also show that the snow groomer LH500 has insufficient light all around the machine. Since the LH600 was only a mock up model during the time the report was written many functions wern’t tested. Which means that nothing can be said about the vibrations and the response of the control lever in the new model. However what should be taken in concern from the analysis of the LH500 is the problem with keeping the windows clear, that must be improved in the new model. The LH600 will have Xenon headlights which means that the light in that machine will be improved. The LH600 facing the same problem as the LH500 with a difficult ingress of the cabin and the recommendations from the analysis of the LH500 should be implemented in the new model. The examination of the 600 model shows that the control lever has to be more userfriendly. Both the shape and the functions of it must be redesigned. Display clutter is also a problem with the instrumentation in the LH600. Too much information are shown on a too little display. The position of the control lamps is also bad and should be changed. When it comes to the steering control of the LH50 no major problem have been found. But the recommondation for the LH600 is anyway to change from using steering levers to use a mini joystick. This to be able to move functions from the control lever and put them on the steering function. The purpose with this change is to reduce the number of functions that are on the control lever in the LH600.

Place, publisher, year, edition, pages
2002.
Keyword [en]
Technology, Snow grommer, Cabins, Driver environment
Keyword [sv]
Teknik
Identifiers
URN: urn:nbn:se:ltu:diva-44693ISRN: LTU-EX--02/121--SELocal ID: 274aeb73-e932-48df-a16a-5a3848d559d1OAI: oai:DiVA.org:ltu-44693DiVA: diva2:1017972
Subject / course
Student thesis, at least 30 credits
Educational program
Ergonomic Design & Production Engineering, master's level
Examiners
Note
Validerat; 20101217 (root)Available from: 2016-10-04 Created: 2016-10-04Bibliographically approved

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