Construction of Comfortable System to Secure the Tipping Safety of Off-Road Working Machinery-Man System under Complex Conditions

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For systems consisting of off-road working machinery and man, that is driver of the machinery, to construct a comfortable system to ensure the tipping safety under complex conditions, we developed a real simulator composed of driving cabin, small crawler crane and its supporting ground and also a virtual simulator for crane-its supporting ground system. By using these simulators, in conditions close to the tipping limit state, interrelations between driving and vital characteristics of drivers and the dynamic behavior of machine and ground were analyzed synthetically and a fundamental principle to ensure the tipping safety with comfortable usage was described. A driver support system was made on a trial basis and the availability was investigated.