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CORRELATION OF BENDING STRENGTH AND ERRORS OF HELICAL GEAR has not been clarified sufficiently even now. As the investigation by using only experimental method is not sufficient and so the analytical method of obtaining gear bending strength has been developed by one of the authors. Hence, the correlation of bending strength and errors, especially in the aspect of the direction of pressure angle error and tooth trace error, is clarified by this analytical method which was verified by some experiments. And by further investigations, it is confirmed that the helical gear is tougher against the negative pressure angle error, and the fine module gear is sensitive against the errors.

In this paper a computer simulation study on the effects of steering parameters on lateral dynamics of the guideway bus to contribute to a development practice of designing optimum steering control system are dealt with. A stability limit of vehicle lateral motion is analyzed and an emphasis is laid on the effects of moment of inertia of a conventional steering wheel and lateral elasticity of the guide rail which have proven to reduce the critical vehicle speed. It is pointed out conclusively that a normal bus equipped with additional simple guidance equipments can be guided smoothly on a simple guideway at adequately high vehicle speed.

The influence of the tyre properties on the driving behaviour of single-track vehicles has been measured by performing running tests with full-scale vehicles. The indoor dynamic tyre measurements using the sideslip angle as the input signal reveale that the sideforce and self-aligning moment characteristics are helpful explaining the measured driving behaviour. The obtained tyre parameters values and second order equations have been implemented in the simulation program ADINA-MOBSIP. This program is specially conceived for the simulation of the driving behaviour of single-track vehicles and is based on the finite element method.