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Using neural networks, an algorithm has been developed to steer a wheel loader vehicle. Mathematical functions have been used in the past in an attempt to model a human in their operation of many types of vehicles. Since such functions can typically only be derived for situations in which the problem domain is thoroughly understood, research continues in an effort to develop a complete “operator model”. Neural Network algorithms were utilized in an attempt to determine the feasibility of accurately modeling the operator of a wheel loader construction vehicle. These algorithms were also used to determine how the control of different vehicle functions might be automated on a wheel loader.

This paper describes an appropriate computer model for an articulated wheel loader. From this model, computer trials or runs were made to simulate typical loading cycles or phases of the loading cycle so that certain variables such as steering cylinder pressures could be determined. This paper also describes the development of an earthmoving tire model. The tire model considers three modes of operation: sticking, sliding, and rolling. This model is integrated into the simulation to improve the accuracy of the results.

This article describes a logic algorithm which interprets the operator's driving input during emergency steering conditions. This algorithm is integrated with a dynamic simulation model of an off-road vehicle in the analysis of vehicle performance. SAE J53 Standard information has been considered in the test course data used in the simulation. The results greatly reduce the time required to analyze this complex problem with respect to design of the emergency steering pump.

This paper deals with the study of the strength conditions of bolted assemblies subjected to various types of repeated loads. The loads considered are repeated axial loads, repeated bending loads, and repeated combined loads, which are composed of axial and bending loads. A rational equation of the strength of a bolted assembly is suggested in order to express the conditions that exist when such an assembly is subjected to conditions of combined dynamic loading.