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护盾式临时支护机器人带压行驶液压控制系统研究

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护盾式临时支护机器人是适应夹矸与片帮共存的大断面巷道智能掘进机器人系统的重要组成部分,其主要功能是为实现"掘支并行"作业提供安全可靠的工作空间.为加强护盾式临时支护机器人推移行驶过程中对围岩的安全稳定支护,根据护盾式临时支护机器人结构、工作环境与作业需求,建立其带压行驶的推移量与支护力数学模型及带压行驶动力学模型,设计了护盾式临时支护机器人带压行驶液压控制系统.该系统主要由支护液压系统、行驶液压系统组成:静态支护时,支护液压系统需时刻输出大于上盾体自身重力的支护力,行驶液压系统处于待机状态;带压行驶时,支护液压系统和行驶液压系统同时工作,在保证临时支护机器人"减压不离顶"的同时,与顶板时刻带压并稳步前移.提出了基于模糊PID的护盾式临时支护机器人带压行驶精准控制方法:通过集成在推移油缸上的位移传感器与液压回路中的压力传感器实时采集临时支护机器人的压力与位移信号,用于反映临时支护机器人带压行驶途中支护力和行驶位移的变化情况,并根据支护力和推移量的误差和误差率,利用模糊PID算法对支护力和推移量的控制参数进行修正,实现基于模糊PID算法的带压行驶可靠控制.仿真与实验结果均表明,模糊PID控制的效果优于传统PID控制,在模糊PID控制下,护盾式临时支护机器人推移行驶过程中的支护力相对误差小于1％,行驶位移误差小于2 mm,且支护力和推移量控制响应速度快,保证了推移行驶过程中对围岩的安全稳定支护.
Research on hydraulic control system for shield type temporary support robot driving under pressure
The shield type temporary support robot is an important component of the intelligent excavation robot system for large section roadways that adapts to the coexistence of dirt and debris.Its main function is to provide a safe and reliable workspace for achieving"parallel excavation and support"operations.In order to enhance the safe and stable support of the shield type temporary support robot for surrounding rock during its pushing and driving process,based on the structure,working environment,and operational requirements of the shield type temporary support robot,a mathematical model of its pushing amount and support force during pressurized driving,as well as a dynamic model of pressurized driving,are established.A hydraulic control system for the shield type temporary support robot driving under pressure is designed.The system mainly consists of a support hydraulic system and a driving hydraulic system.During static support,the support hydraulic system needs to constantly output a support force greater than the weight of the upper shield body itself,and the driving hydraulic system is in standby mode.When driving under pressure,the support hydraulic system and the driving hydraulic system work simultaneously,ensuring that the temporary support robot"reducing stress without leaving the roof'while steadily moving forward with the roof under pressure at all times.A precise control method for shield type temporary support robot driving under pressure based on fuzzy PID is proposed.The pressure and displacement signals of the temporary support robot are collected in real time by displacement sensors integrated on the displacement cylinder and pressure sensors in the hydraulic circuit.The signals are used to reflect the changes in support force and driving displacement during the temporary support robot's driving under pressure.Based on the error and error rate of the support force and displacement,the fuzzy PID algorithm is used to modify the control parameters of the support force and displacement,achieving reliable control of driving under pressure based on the fuzzy PID algorithm.Both simulation and experimental results show that the effect of fuzzy PID control is superior to traditional PID control.Under fuzzy PID control,the relative error of support force during the pushing and driving process of the shield type temporary support robot is less than 1％,and the driving displacement error is less than 2 mm.Moreover,the response speed of support force and pushing amount control is fast,ensuring the safe and stable support of the surrounding rock during the pushing and driving process.

shield type temporary support robothydraulic control systemdriving under pressuresupport force controldriving displacement controlfuzzy PID control

马宏伟、李烺、薛旭升、王川伟、王赛赛、赵英杰、周文剑、张恒

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西安科技大学机械工程学院,陕西西安 710054

陕西省矿山机电装备智能检测与控制重点实验室,陕西西安 710054

护盾式临时支护机器人 液压控制系统 带压行驶 支护力控制 行驶位移控制 模糊PID控制

国家重点研发计划资助项目国家自然科学基金面上项目陕西省重点研发计划专项项目陕西省科技计划项目

2023YFC2907603523741612023-LL-QY-032023-JC-YB-331

2024

10.13272/j.issn.1671-251x.2024030001

工矿自动化
中煤科工集团常州研究院有限公司

工矿自动化

CSTPCD北大核心
影响因子：0.867
ISSN：1671-251X
年,卷(期)：2024.50(7)
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