液压支护机器人群组移架一致性分布式协同控制

Distributed cooperative control of consistency of hydraulic support robot group moving frame

  • 摘要: 液压支架作为采煤工作面推进和支护的主要装备,其推移的一致性直接影响采煤工作面的平直度,进而影响作业安全和开采效率,目前液压支架系统主要采用集中控制方式,一旦中心控制器出现故障,将严重影响系统的正常运行。将液压支架视为具备自主感知能力、决策能力和控制能力的智能个体,提出了去中心化的液压支架群组一致性的分布式协同移架控制方法。首先,结合支架机械结构,分析建立液压支架单体移架机构的数学模型,设计了一种基于状态信息的自适应通信拓扑构建方法;其次,根据提出的通信拓扑结构,制定了一致性控制协议,并设计了分布式扩张状态观测器以及扰动反馈回路,用以实现对未知扰动的估计并在输出主动抵消干扰,从而提高一致性控制算法的鲁棒性;最后,通过Amesim-Simulink联合仿真验证了一致性控制算法的可行性,通过与PID对比,分析了算法控制精度以及对未知扰动的主动抗扰能力,并对间隔交错移架和成组顺序移架2种常用移架方式下的可行性和稳定性进行了仿真验证。结果表明,提出的分布式协同控制方法能实现各种复杂干扰下的液压支架群组自动移架和自主调直功能,相较于工程常用的PID集中控制方法,具有可靠性高、推移一致性好、主动抗扰能力强、拓展性好等优点,能够自主调节控制策略以适配多种移架方式,提高移架效率和安全性。

     

    Abstract: As the main equipment of coal mining face's propulsion and support, the consistency of hydraulic support directly affects the flatness of coal mining face, and then affects the operation safety and mining efficiency. At present, the hydraulic support system mainly adopts centralized control mode, and once the central controller fails, it will seriously affect the normal operation of the system. The hydraulic support is regarded as an intelligent individual with independent perception, decision-making ability and control ability, and a decentralized distributed cooperative support moving control method is proposed. Firstly, combined with the mechanical structure of the support, the mathematical model of the single moving mechanism of the hydraulic support is analyzed and established, and an adaptive communication topology construction method based on state information is designed. Secondly, according to the proposed communication topology, the consistency control protocol is formulated, and the distributed extended state observer and disturbance feedback loop are designed to estimate the unknown disturbance and actively cancel the disturbance at the output, thus improving the robustness of the consistency control algorithm. Finally, the feasibility of the consistency control algorithm is verified by Amesim-Simulink co-simulation. By comparing with PID, the control accuracy and active anti-disturbance ability of the algorithm are analyzed, and the feasibility and stability of the two common methods of staggered frame moving and group sequential frame moving are simulated and verified. The results show that the distributed cooperative control method proposed can realize the functions of automatic moving and self-straightening of hydraulic support groups under various complex disturbances. Compared with the PID centralized control method commonly used in engineering, it has the advantages of high reliability, good consistency, strong active anti-interference ability and good expansibility, and can adjust the control strategy independently to adapt to various moving modes, thus improving the efficiency and safety of moving supports.

     

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