摊铺机行走系统速度刚度研究

发布时间：2018-01-05 05:39

本文关键词：摊铺机行走系统速度刚度研究　出处：《长安大学》2015年硕士论文　论文类型：学位论文

更多相关文章： 摊铺机 速度刚度 闭环控制 模糊PID

【摘要】：沥青混凝土摊铺机作为公路施工中必不可少的工程机械,其作业质量的好坏直接关系到铺筑路面的性能。摊铺机作业过程中的速度稳定性是影响其作业质量的关键因素,因而对摊铺机行走系统速度刚度进行分析具有重要的意义。论文在理论分析的基础上得到了摊铺机行走系统的仿真模型,结合样机相关参数及作业过程中载荷变化规律对摊铺机作业过程中的行走速度进行了仿真分析,并就行走系统的合理设计提出了若干意见。通过分析摊铺机行走系统的静态速度刚度表达式可以发现,影响摊铺机作业速度稳定性的主要因素是摊铺机牵引力的发挥及行走系统各组成部件的性能。因而从硬件组成上考虑,提高摊铺机行走系统速度刚度的主要措施有对牵引力与外界负载进行合理匹配,改善行走系统的传动效率,优化发动机及履带行走机构配置。其中,行走系统传动效率的改善,主要依赖于对行走液压系统的泄漏量以及机械传动部件制造精度的改善。发动机及履带行走机构配置的优化,主要依赖于在发动机控制以及履带的结构形式上应用新技术。论文在分析摊铺机静态速度刚度表达式的基础上,提出了微调行走泵排量的解决办法,从而证明了在行走系统中加入闭环工作档的意义及作用。为了进一步分析闭环控制对行走系统的速度刚度的影响,同时探究闭环控制系统各参数的取值办法,论文从系统传递函数的角度对摊铺机行走系统进行了深入分析,并依据样机的基本参数给定了闭环控制系统的控制参数,最终得到了摊铺机行走系统的simulink仿真模型。通过对摊铺机进行试验分析,验证了牵引力、滑转率及闭环控制对于行走系统速度刚度的影响。利用行走系统的仿真模型,分析了行走系统各档位下的阶跃响应以及实际载荷作用下的速度响应,一方面验证了改善系统硬件参数对行走系统速度刚度的作用,另一方面说明模糊PID控制是提高行走系统速度稳定性的重要手段,其控制效果依赖于控制参数的合理取值。
[Abstract]:Asphalt concrete paver is an indispensable construction machinery in highway construction. The quality of the paver has a direct bearing on the pavement performance. The stability of the paver speed is the key factor to affect the quality of the paver. Therefore, it is of great significance to analyze the velocity and stiffness of paver walking system. On the basis of theoretical analysis, the paper obtains the simulation model of paver walking system. Combined with the related parameters of the prototype and the law of load variation during the operation, the paper simulates and analyzes the walking speed of the paver during the operation. Some opinions on the reasonable design of the walking system are put forward, which can be found by analyzing the static velocity stiffness expression of the paver walking system. The main factors affecting the speed stability of paver are the exertion of the paver's traction force and the performance of the components of the walking system, so the hardware composition is considered. The main measures to improve the speed stiffness of paver walking system are to match the traction force with the external load, to improve the transmission efficiency of the walking system, and to optimize the configuration of the engine and crawler walking mechanism. The improvement of driving efficiency of walking system mainly depends on the improvement of the leakage of walking hydraulic system and the manufacturing precision of mechanical transmission parts, and the optimization of the configuration of engine and crawler walking mechanism. This paper mainly relies on the application of new technology in engine control and track structure form. Based on the analysis of the static velocity stiffness expression of paver, the paper puts forward the solution of fine adjusting the displacement of walking pump. In order to further analyze the effect of the closed-loop control on the speed stiffness of the walking system and explore the value of the parameters of the closed-loop control system. In this paper, the paver walking system is deeply analyzed from the point of view of the system transfer function, and the control parameters of the closed-loop control system are given according to the basic parameters of the prototype. Finally, the simulink simulation model of paver walking system is obtained, and the tractive force is verified by the experimental analysis of paver. The effects of slip rate and closed loop control on the velocity stiffness of walking system are analyzed. The step response of walking system under different gear and the velocity response under actual load are analyzed by using the simulation model of walking system. On the one hand, the effect of improving the system hardware parameters on the speed stiffness of the walking system is verified. On the other hand, the fuzzy PID control is an important means to improve the speed stability of the walking system. The control effect depends on the reasonable value of the control parameters.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U415.521

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