矿用自卸车液压制动系统设计仿真及智能制动策略研究

发布时间：2018-04-16 11:09

本文选题：矿用自卸车 + 全液压　；参考：《西安建筑科技大学》2015年硕士论文

【摘要】：非公路(矿用)自卸车(Mining truck),也称之为非公路运输车(Off-highway truck)是大型露天矿、水利等工程中采用的主要运输工具,对我国的国民工业有着举足轻重的作用。非公路矿用自卸车的制动系统必须保证在各种工况下都具有良好的制动性能,并且要求操作轻便和高的可靠性。但时常由于驾驶员的疲劳驾驶、情绪波动、注意力不集中等原因会导致不必要的事故发生。随着技术的不断进步,无人化矿用自卸车应运而生,已成为自卸车的发展趋势。目前,电液控制技术已经开始向数字化发展,如果能使制动系统在电液自动控制系统下实现智能控制,同时不影响人工制动效果,那将使得制动系统的安全性能和自卸车的自动化程度得到一定提升。本文就是在此种需求和背景条件下综合运用理论分析、仿真模拟、归纳分析等研究方法,根据传统经典全液压制动系统设计了人电双控全液压制动系统,并对其进行了相关研究,主要研究工作如下:(1)选型分析了典型全液压制动系统的主要元部件,并说明了其在液压制动系统中的原理及功用。(2)分析了几种经典自卸车液压制动系统的制动原理。设计了人电双控全液压制动系统,得到了一种既能通过人工控制踏板阀的开关量来控制制动力大小,又可通过控制电流大小来控制制动力大小的人电双控全液压制动系统,其中制动力大的制动方式起作用,且两种方式互不干扰,同时又起到了一定的安全保护作用。并分析了人电双控液压制动系统在各种典型制动工况下的液压油路制动原理。(3)建立了电液比例减压阀和人电双控液压制动系统的数学模型,并利用MATLAB/SIMULINK软件对电液比例减压阀进行了动、静态性能仿真分析,对人电双控全液压制动系统电控部分的整个制动过程进行了动态性能仿真分析。(4)归类总结了人电双控全液压制动系统的各种制动工况的具体特征、出现的问题及问题的解决方案,将液压制动系统和具体存在问题相结合,归纳分析了自卸车在各个制动工况下的智能制动策略,并将相关工况参数融入到智能制动策略中,进行了定性分析。
[Abstract]:Off-highway (mining) dump truck is also called Off-highway truckage, which is the main transportation tool used in large open-pit mine, water conservancy and other projects, which plays an important role in the national industry of our country.The braking system of off-highway mine dump truck must have good braking performance under various working conditions, and it is required to operate easily and with high reliability.However, unnecessary accidents often occur due to drivers' fatigue driving, emotional fluctuation and lack of concentration.With the development of technology, the dump truck has emerged as the times require, and has become the development trend of the dump truck.At present, electro-hydraulic control technology has begun to digital development, if the braking system in the electro-hydraulic automatic control system to achieve intelligent control, at the same time do not affect the effect of manual braking,That will improve the safety of the braking system and the automation of the dump truck.In this paper, based on the theory analysis, simulation, induction analysis and so on, under this kind of requirement and background condition, the author designs the man-electric double control full hydraulic braking system, according to the traditional classical full hydraulic braking system.The main research work is as follows: 1) selection and analysis of the main components of typical full hydraulic braking system.The principle of hydraulic braking system and its function in hydraulic braking system are explained. The braking principle of several classic hydraulic braking system of dump truck is analyzed.A full hydraulic brake system is designed, which can control the braking force not only by manually controlling the switch quantity of the pedal valve, but also by controlling the current of the brake force.The braking mode with large braking force plays a role, and the two modes do not interfere with each other, at the same time, they play a role of safety protection.The mathematical models of electro-hydraulic proportional pressure reducing valve and man-electric double-controlled hydraulic brake system are established by analyzing the hydraulic oil path braking principle of the man-electric double-controlled hydraulic braking system under various typical braking conditions, and the mathematical models of the electro-hydraulic proportional pressure reducing valve and the man-electric double-controlled hydraulic braking system are established.The dynamic and static performance of the electro-hydraulic proportional pressure reducing valve is simulated and analyzed by using MATLAB/SIMULINK software.The dynamic performance simulation analysis of the whole braking process of the electrically controlled hydraulic brake system is carried out. The specific characteristics of all kinds of braking conditions of the full hydraulic braking system are classified and summarized.The existing problems and solutions are combined with the hydraulic braking system and the existing problems. The intelligent braking strategies of the dump truck under various braking conditions are summarized and analyzed, and the parameters of the relevant working conditions are integrated into the intelligent braking strategy.Qualitative analysis was carried out.
【学位授予单位】：西安建筑科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD562

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