Design On Differential System Of Wheeled Construction Machinery

The working condition of wheeled construction machinery is quite bad. It does not like that of track construction machinery that had a high anti-skip capability. Therefore, the anti-skip ability of the differential system to wheeled construction machinery is very important. The varying range of self-locking coefficient of traditional wheeled construction machinery differential is small. Its anti-skip function is limited. This could be easy to cause the vehicle to slip and affect its handling stability, passing property and could lower working efficiency. Besides that, in the processing of driving, it can not initiatively adapt the change of working conditions and it is difficult to realize automatic control. Under the tendency of developing in the direction of automation, traditional wheeled construction machinery differential has become increasingly unreasonable.Aimed at these flaw of weak anti-slide function in traditional wheeled construction machinery, this paper takes STC Single-Chip as the control chip, adopts the best slip rate as the control objective, adopts PI fuzzy control logic as the control algorithm to investigate the characteristic of automatic limited slip differential system.At first, the contactable condition between wheel and rail in the antiskid process was researched in this paper. According to the basic theory of antiskid system, applying a single wheel model, the thesis analyzed the motional condition. Secondly, taking Single-chip Computer as the heart of control, all function circuits of antiskid system was designed. Analyzing and comparing the control strategy of antiskid system, advantages and disadvantages of common control parameters.The antiskid controlling software based on the control method of fuzzy PID was compiled. To monitor the data we need, the control interface based on Labwindows/CVI was designed and series communication was realized in the function . By many times of test, it proved that the design of the antiskid system is circuit was reasonable. The system could measure the accurately data we need and control the output timely according to calculation and judgment. It would provide experimental evidence to apply the antiskid system in the wheeled construction machinery really.