目的 针对螺旋粉末灌装机在“多段速”工况下的快速切换需求,旨在提高永磁同步电机的动态响应与抗扰能力,进而提升包装效率。方法 提出一种基于新型指数趋近率和非奇异快速终端滑模负载观测器的复合控制策略。首先,设计包含变速幂次项的新型趋近率,以加快趋近速度并抑制系统抖振;其次,构建改进型非奇异快速终端滑模观测器,对物料变化引起的负载扰动进行实时估计与前馈补偿。结果 仿真表明,该策略在带载启动、多段速跟踪及突变负载工况下性能优于传统方法。特别在模拟变速阶段,调节时间大幅缩短,转速超调量低于0.5%。结论 该策略具有收敛快、鲁棒性强等特点,较好地平衡了抖振抑制与响应速度,显著提高了复杂工况下的速度跟踪精度,为灌装节拍与精度的协同优化提供可行路径。
Abstract
To meet the rapid switching requirements of spiral powder filling machines under "multi-speed operation" conditions, the work aims to enhance dynamic response and anti-disturbance capability of Permanent Magnet Synchronous Motors (PMSMs), thus improving packaging efficiency. A composite control strategy was proposed based on a novel exponential reaching law and a non-singular fast terminal sliding mode load observer. Firstly, a novel reaching law with a variable-speed power term was designed to accelerate the reaching speed and suppress system chattering. Secondly, an improved non-singular fast terminal sliding mode observer was constructed to realize real-time estimation and feed-forward compensation for load disturbances induced by material variations. Simulation results demonstrated that the proposed strategy outperformed traditional methods in loaded start-up and multi-speed tracking scenarios. In particular, during the simulated gear-shifting phase, the adjustment time was significantly reduced, and the speed overshoot was less than 0.5%. This strategy features fast convergence and strong robustness. It well balances chattering suppression and response speed, significantly improves the speed-tracking accuracy under complex operating conditions, and provides a feasible approach for the collaborative optimization of filling rhythm and precision.
关键词
永磁同步电机 /
滑模控制 /
趋近率 /
扰动观测器 /
螺旋粉末灌装机
Key words
permanent magnet synchronous motor /
sliding mode control /
reaching law /
disturbance observer /
spiral powder filling machine
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