电动装载机转向系统电液流量匹配控制策略

Electric Loader Steering System Electro-hydraulic Flow Matching Control Strategy

针对电动装载机优先型流量放大转向系统单动工况下节流损耗严重的问题,提出了一种电液流量自适应匹配的节能型控制策略。首先,介绍了优先型流量放大转向系统工作原理;其次,建立转向系统能量损失模型;然后,提出转向系统电液流量匹配控制策略,实现液压泵输出流量与转向系统需求流量的匹配,并构建液压泵流量非线性映射补偿模型,提升流量控制精度;最后,利用AMESim软件搭建系统仿真模型,与原系统对比仿真分析。结果表明:改进后系统流量损耗降低62.68%,能量损耗减少65.26%,节能效果显著,为电动装载机的推广应用奠定基础。

Aiming at the problem of serious throttling loss under the single-action condition of the priority flow amplification steering system of electric loader,an energy-saving control strategy with adaptive matching of electro-hydraulic flow is proposed.Firstly,the working principle of priority flow amplification steering system is introduced.Secondly,the energy loss model of the steering system is established.Then,the electro-hydraulic flow matching control strategy of the steering system is proposed to match the output flow of the hydraulic pump with the demand flow of the steering system,and a nonlinear mapping compensation model for the flow of the hydraulic pump is constructed to improve the flow control accuracy.Finally,the system simulation model is built by AMESim software,and the simulation analysis is compared with the original system.Results show that the flow loss of the improved system is reduced by 62.68%and the energy loss is reduced by 65.26%,and the energy-saving effect is remarkable,which lays a foundation for the promotion and application of electric loader.