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The rollover accidents in the tractor semi-trailer are often fatal and many factors could cause the tractor semi-trailer rollover. In this paper, a rollover prevention control method was proposed based on real-time calculation of rollover index. The vehicle Center of Gravity (CG) height from the ground is an important parameter in the rollover index and it is estimated through lateral acceleration sensor and suspension deflection sensors. Comparing the rollover index with the preset threshold, the differential braking will be applied to corresponding wheels once the trigger conditions are met. A roll stability control simulation was performed on the dynamic model based on virtual prototyping. The results show that the rollover prevention control proposed in this paper can stabilize the tractor semi-trailer and prevent from rollover on high speed curve driving.

A mechanical analysis is made on the changing cross-sectional segment of the fibre band in the condensing zone of compact spinning. By analysing the condensing process of fibre band in the condensing zone, a mechanical model for the changing cross section is established in this article. The model further validates the fact that there exist additional twists in this part of fibre band from both theoretical and numerical points of view. Besides, the three major factors, that is, the friction coefficient between fibre band and the lattice, the underpressure and the length of suction, are also analysed, revealing that the larger the three factors are, the larger the additional twists will be.

Information promotes and boosts up the competion of enterprises;Information integration is an important content. Characteristic of single-piece and small-lot is different from the other manufacture mode, so its information integration is different from the others too. The paper aims at the questions, analyses the content and relation of information integration based on single-piece and small-lot, brings forward information integration flow of based on BOM and emphasizes on the methods of information integration that adapt to single-piece and small-lot to improve the feasibility of manufacture plan.