某推土机作业时动力传动效率动态匹配

Dynamic Matching of Power Transmission Efficiency of Bulldozer under Operation Condition

为解决大功率推土机在持续作业工况下液力机械传动效率较低的问题,建立基于模块化的推土机动力传动系统动力学仿真模型,设计效率型动力传动系统动态匹配策略,建立负载控制模型和油门开度控制模型,构建Isight和Matlab联合集成优化设计平台,整定和优化负载和油门开度控制系统的PID参数,设计完成动力传动系统半实物仿真试验。结果表明所提出的效率型动力传动系统动态匹配方法可有效提高推土机持续作业工况的工作效率,抑制持续作业引起的动力不足等问题。

When a high-power bulldozer works with the heavy load for a long time, the efficiency of hydraulic mechanical transmission decreases obviously.To solve this problem, the dynamic simulation model of bulldozer power transmission is constructed based on modularization theory.And a dynamic match strategy of guaranteeing the high transmission efficiency is designed.Moreover, a load control model and a throttle opening control model are constructed.And then the optimizing design platform is established to confirm and optimize the PID parameters of load control and throttle opening control model adopting Isight and Matlab software.Eventually, hardware-in-the-loop test is designed and accomplished.The results show that the proposed dynamic matching strategy increases the transmission efficiency of bulldozer obviously under continuous operation conditions, and insufficient power during long operation process is effectively controlled.