基于三变量控制的平板车行走驱动系统研究

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.

Research on Driving Travel System of Drop-deck Trailers Based on Three Variables Control

Due to complex engine control algorithm, and multi variation in functions, a problem has ever existed in match-up of the engine with the hydraulic system that during an operation the operator alone has to determine the engine’s output that would lead to over-power delivery or insufficient, and would further cause a status of power waste or low work efficiency. In order to solve that problem the engine has to enter a control circle that the traditional way to control a displacement in the hydraulic pump thru a closed loop has to be changed to a control over 3-variables of the hydraulic pump, hydraulic motor, and the engine, in a closed loop. Based on the travel drive system of a drop-deck trailer we emphasize analyses of travel and operation of the flat-bed truck so as to optimize the system performance, up-grade the work efficiency and the mechanical function as our target. We utilized SIMULINK to have constructed a mathematical model for the 3-variable system, and adopted PID for control algorithm, and through a simulation analysis we have found rules for data optimization and readjustment so as to search for a match-up operation amid the 3-variables. The test prove was carried out on the basis of simulation to have provided theoretical bases for designing the flat-bed truck product, which has realistic significance to turn out energy saving in high efficiency and lower power consumption.