论文部分内容阅读
由于发动机控制算法复杂、特性多变,在工程机械行业中一直没有解决发动机和液压系统的匹配控制问题,作业过程中完全由操作人员决定发动机的输出,这就导致输出动力过剩或者不够,造成浪费或者作业效率低的现状。为了解决这个问题将发动机也加入控制环中,从传统的只对液压泵一个变量进行闭环控制,变为对液压泵、液压马达、发动机三变量进行闭环控制。立足于平板车的行走驱动系统,主要对平板车行走作业重点分析,以优化系统性能,提高工作效率和机械性能为目标,利用SIMULINK建立三变量系统的数学模型,采用PID控制算法,经过仿真分析,找出参数优化调节规则,寻求三变量间的匹配运行。在仿真的基础上进行试验验证,为平板车产品的设计提供理论依据,对实现高效节能,降低能耗具有重要的现实意义。
As the engine control algorithm is complex and its characteristics are changing, the matching control of the engine and the hydraulic system has not been solved in the construction machinery industry. The operator completely determines the output of the engine during the operation, which leads to excess output power or insufficient output, resulting in waste Or the current situation of low efficiency. In order to solve this problem, the engine is also added into the control loop. From the traditional closed-loop control of only one variable of the hydraulic pump, the three-variable control of the hydraulic pump, the hydraulic motor and the engine is closed-loop controlled. Based on the walking drive system of the flatbed vehicle, the paper mainly analyzes the key task of the flatbed walking operation, and optimizes the system performance and improves the working efficiency and mechanical performance. The mathematical model of the three-variable system is established by using SIMULINK. The PID control algorithm is adopted. Optimization parameters out of the rules, to find the matching between the three variables run. Experimental verification on the basis of simulation provides a theoretical basis for the design of flatbed products and has important practical significance for realizing high efficiency and energy saving and reducing energy consumption.