太阳辐射表检定系统多维工作台的线性自抗扰优化控制

Optimal Control of LADRC for Multi-dimensional Turntable for Solar Radiation Meter Calibration Systems

为提高多维工作台定位精度,提出一种线性自抗扰优化控制策略。根据多维工作台转臂机构机械结构特性建立数学模型并搭建控制系统。为补偿已知和未知扰动,将控制系统位置环引入线性自抗扰控制器,并加入混沌粒子群算法对控制器参数进行优化。最后进行仿真分析和实验验证。结果表明,线性自抗扰优化控制策略下的定位精度较传统比例积分控制策略和线性自抗扰控制策略分别提高约89.46%和76.33%。多维工作台转臂机构控制系统采用线性自抗扰优化策略,响应速度快,没有超调量,提高了多维工作台的定位精度,提高了太阳辐射表检定系统的使用性能。

In order to improve the positioning accuracy of the multi-dimensional turntable,an linear acive disturbance rejection control optimisation control strategy is proposed.A mathematical model is developed and a control system is built based on the mechanical structure characteristics of the multi-dimensional turntable rotating arm mechanism.To compensate for known and unknown disturbances,an linear acive disturbance rejection control controller is introduced into the position loop of the control system and a chaotic paticle swarm optimization is added to optimise the controller parameters.Finally,simulation analysis and experimental verification are carried out.The results show that the positioning accuracy is improved by approximately 89.46%and 76.33%respectively compared to the traditional PI control strategy and the linear acive disturbance rejection control control strategy.The control system of rotating arm mechanism adopts the linear acive disturbance rejection control optimisation strategy,which has a fast response time and no overshoot,improving the positioning accuracy of the multi-dimensional turntable and the performance of the solar radiation meter calibration system.