To understand the vibration characteristics of rubber track system in traveling, this research studied the small harvester installed with rubber track system and the dynamic model reflecting vibration characteristics of rubber track system on the ground was constructed. Comparing analysis results with measured experimental data obtained from vehicle test, it is proved that the dynamic model established by theoretical analysis can correctly and effectively predict actual movement condition and vibration characteristics of rubber track system, especially at low test vehicle speeds. The relative difference between measured data of vibration acceleration obtained from real vehicle tests and the theoretical value was in the range of-1.2 %-+18.2 %. The vibration prediction and analysis method of rubber tracked vehicle was discussed in this study, and important basic data were provided for the research of comfort evaluation of working posture and lightweight design of rubber tracked mechanism.

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In order to overcome the characteristics of multi-dimensionality, fuzziness and uncertainty in the evaluation of comprehensive performance of mechanical products, the Improved Fuzzy Analytic Hierarchy Process is used to perform the evaluate. An evaluation index system is established, the weight of index in consolidated layer is determined by the Analytic Hierarchy Process, and the weight of index in the item layer is determined by Valuation Method. The variance is used to test the volatility. The degree matrix of membership is constructed using the Fuzzy Comprehensive Evaluation, and the vector of the target layer is obtained by fuzzy calculation. The result is obtained according to the principle of maximum membership degree and by calculating the comprehensive evaluation value. An case study has been given to illustrate the application of Improved FAHP, which effectively solved the problem.

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