一种基于时频控制方法的控制器设计与实验
发布时间：2018-07-18 14:33
【摘要】：为提升被控系统在整个工作频域内的动态性能,本文提出一种时频(time-frequency,TF)控制方法的理论框架,该框架通过应用小波分析技术以提高传统控制器性能的方式达到上述目标.在阐述了此框架下TF控制机理的基础上,结合传统PI控制方法设计了一种时频PI(time-frequency PI,TFPI)控制器,并对TFPI控制器中时频参数的设计原理进行了分析.针对TFPI控制器中参数众多所导致的整定工作量增大的问题,结合最优控制理论中积分型性能指标的概念,建立了以单纯形优化方法为手段的参数自动寻优策略.最后以电磁阀控制液压缸系统模型为例进行了控制器硬件在环仿真测试.阶跃响应结果显示,在超调量不超过1%的要求下,相对传统PI控制器0.15s左右的响应时间,TFPI控制器响应时间可达0.06s,在不失稳定性的情况下显著提升系统的动态性能;此外,与文献中其他两种TF控制算法亦进行了仿真比较,结果进一步证明了该控制方法在系统动态性能提升方面的有效性.
[Abstract]:In order to improve the dynamic performance of the controlled system in the whole operating frequency domain, this paper presents a theoretical framework of time-frequency TF control method, which can improve the performance of traditional controller by using wavelet analysis technology. Based on the description of TF control mechanism under this framework, a time-frequency Pi (time-frequency Pi) controller is designed in combination with the traditional Pi control method, and the design principle of the time-frequency parameters of the time-frequency controller is analyzed. Aiming at the problem of increasing the setting workload caused by the numerous parameters in the TFPI controller, a parameter automatic optimization strategy based on simplex optimization is established by combining the concept of integral performance index in the optimal control theory. Finally, the controller hardware in loop simulation test is carried out by taking the solenoid valve control hydraulic cylinder system model as an example. The step response results show that the response time of TFPI controller can reach 0.06s compared with that of traditional Pi controller about 0.15 s under the requirement of less than 1% overshoot, and the dynamic performance of the system can be improved significantly without loss of stability. Compared with the other two TF control algorithms in literature, the simulation results show that the proposed control method is effective in improving the dynamic performance of the system.
【作者单位】： 中国农业大学现代农业装备优化设计北京市重点实验室;德克萨斯A&M大学机械工程系;
【基金】：北京市科技创新基地培育与发展基金专项(Z151100001615017)资助~~
【分类号】：TP273
本文编号：2132204
[Abstract]:In order to improve the dynamic performance of the controlled system in the whole operating frequency domain, this paper presents a theoretical framework of time-frequency TF control method, which can improve the performance of traditional controller by using wavelet analysis technology. Based on the description of TF control mechanism under this framework, a time-frequency Pi (time-frequency Pi) controller is designed in combination with the traditional Pi control method, and the design principle of the time-frequency parameters of the time-frequency controller is analyzed. Aiming at the problem of increasing the setting workload caused by the numerous parameters in the TFPI controller, a parameter automatic optimization strategy based on simplex optimization is established by combining the concept of integral performance index in the optimal control theory. Finally, the controller hardware in loop simulation test is carried out by taking the solenoid valve control hydraulic cylinder system model as an example. The step response results show that the response time of TFPI controller can reach 0.06s compared with that of traditional Pi controller about 0.15 s under the requirement of less than 1% overshoot, and the dynamic performance of the system can be improved significantly without loss of stability. Compared with the other two TF control algorithms in literature, the simulation results show that the proposed control method is effective in improving the dynamic performance of the system.
【作者单位】： 中国农业大学现代农业装备优化设计北京市重点实验室;德克萨斯A&M大学机械工程系;
【基金】：北京市科技创新基地培育与发展基金专项(Z151100001615017)资助~~
【分类号】：TP273
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1 冯明琴;;数字PID调节参数自动寻优[J];攀枝花学院学报;2007年06期
，本文编号：2132204
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