Aiming at the problems of insufficient power and poor fuel economy in the traditional mechanical or series electric transmission systems of open-pit mine dump trucks, a PS hybrid power system and the deterministic rule power switching control strategy suitable for 100 ton double bridge rigid mining trucks were proposed. The PS type hybrid power mining truck joint simulation models were built by using MATLAB/Simulink and CRUISE software, and vehicle power and economy simulation tests were conducted. The results show that in both pure motor driving mode and diesel engine-motor hybrid mode, the maximum equivalent stress, equivalent elastic deformation, safety factor, etc. of the designed dual planetary gear transmission system are all within the allowable ranges of the materials and may meet the requirements of mechanical transmission structurally. The variation of meshing force between the sun gear, planetary gear, and ring gear shows a sinusoidal waveform in the time domain, which conforms to the variation law of planetary gear transmission. The amplitude changes uniformly in the frequency domain, which may meet the stable operation requirements of the transmission systems. The modified PS type hybrid mining truck has a maximum speed of 63 km/h, a maximum climbing slope of 32%, and a comprehensive fuel consumption of 288 L for uphill and downhill, which has increased by 26%, 60%, and 17.7% respectively compared to the original vehicle model.
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