Abstract: A set of electronic control system of construction machinery is developed by combining theory analysis and gear-shifting control algorithm design on power-train system of ZL50 wheel loader after studying its working characteristics,manipulating modes and total controlling demands. The traditional BP algorithm is improved by chaotic optimizing algorithm in setting up the control model. At last, control experiments are carried through on test-bench of power-train system to check integrated performance of the designed electr-onic control system on automatic transmission. The results of experiments show that the structure and control algorithm of intelligent control system put forward are feasible and effective. The electronic control system could exactly and reliably realize an automatic shifting according to changed working conditions.

Key words: 80C196KC microcontroller, Intelligent control, Automatic transmission, Chaotic neural networks, Construction vehicle