摘要
在分析钢轨铣磨车磨削力控制系统机械结构和工作原理的基础上，视系统的等效作用力为砂轮产生的磨削力和定位靴位移产生的等效作用力的叠加并建立系统的数学模型，设计基于广义预测控制（GPC）的磨削力控制器，采用MATLAB与常规比例～积分一微分控制（PID）对比，仿真研究扰动因素和模型失配对磨削力的影响，并进行试验验证。结果表明：相比PID控制，在相同的阶跃负载扰动下，采用GPC控制时切向磨削力的超调量降低9％～11％，调节时间缩短1／3左右；在相同模型失配条件下，采用GPC控制时的切向磨削力更稳定，系统的通用性和鲁棒性更好。
Based on analyzing the mechanical structure and working principle of the grinding force control system of rail milling train, the equivalent force of the system was considered as a superposition of a force produced by grinding wheel and an equivalent force produced by the displacement of positioning boots. The mathematical model of the system was established and the grinding force controller based on generalized predictive control （GPC） was designed. Simulation study was carried through by the MATLAB and com- pared with the conventional proportional-integral-differential （PID） controller to investigate the influence of disturbance factors and model mismatch on grinding force, and experimental verification was followed. Results indicate that compared with PID control, the overshoot of the tangential grinding force is reduced 9 % ~ 11 G and the setting time is shortened about 1/3 under the same step load disturbance by using GPC. The tangential grinding force with GPC is more stable under the same mismatch of the system model, besides, the universality and robustness of the control system is better.
出处
《中国铁道科学》
EI
CAS
CSCD
北大核心
2014年第6期84-90,共7页
China Railway Science
基金
铁道部科技研究开发计划项目(2012G004-A)
关键词
钢轨铣磨车
磨削力
广义预测控制
PID控制
Rail milling train
Grinding force
Generalized predictive control
PID control
