基于遗传整定的光源跟踪伺服系统模糊PID控制器

提出了一种基于遗传算法整定的模糊PID控制器,并将其应用到光源伺服跟踪系统中.针对光源跟踪伺服系统,设计了模糊PID控制器,实现PID参数的在线调整.由于PID参数初值对于系统的控制效果影响较大,传统的齐格勒-尼科尔法初值整定效果不佳,因而利用遗传算法来整定模糊PID控制器的初值.仿真结果表明：基于遗传算法初值整定的模糊免疫PID控制器具有超调量小,响应速度快和鲁棒性强等优点,提高了系统的性能.     

基于扭转振动装置的内模PID控制器设计

以扭转振动装置为研究对象,分析了其系统的组成结构,并且对于装置的数学模型进行了推导。简单介绍了内模PID控制器的原理,设计了控制器的参数,并进行了仿真实验,得到的仿真曲线证明了该控制器的有效性。     

兆瓦级风力发电机组核心控制器设计

为实现风力发电设备核心控制器国产化,通过分析风力发电机核心控制器所要解决的主要问题、硬件选型方法和软件控制流程,对兆瓦级变桨变速风力发电机组核心控制器提出基于叶轮转速、加速度和角度PID控制的变桨控制算法解决方案.该算法保证风机在实现较高发电效率、最大功率限制的同时,跟踪并补偿风速变化带来的负荷突变,避免给风机传动链造成冲击和给电网带来谐波、闪变危害,提高风机运行的安全可靠性和发电上网的电能质量.数值仿真计算和动态模拟实验证实了该方法的有效性.     

改进挪威VIMEX公司GDS系统工作稳定性的几点措施

在本文中,笔者以自己曾经接触过的挪威VIMEX公司的GDS系统（可燃气体探测系统）为例,介绍了自己在从事这一以日本Koyo公司的可编程控制器为控制单元的自动化监测报警系统的调试及试验过程当中所遇到的几个问题及其解决方法。提出了自己的体会及PLC应用于机电自动化系统中时在软件设计及编程过程中应该注意的几个问题。本文对于从事机电一体化系统设计及PLC软件编程设计专业技术人员具有一定的参考意义。     

A robust gain-scheduling control based on VSC and fuzzy local controller network

Based on variable structure control (VSC) and fuzzy local controller network (FLCN), a new design method of robust gain-scheduling control is proposed in this paper. The proper sliding-modes and the tendency-rates for general operation-points are introduced such that the system gets into the sliding-modes’ motion as soon as possible and has the desired performance. Its good performance is due to the robustness of VSC. However, any local controller works well only in the local region of a specified operation-point. In this paper functions similar to the fuzzy-attributed function in fuzzy-systems are introduced to form FLCN. The simulation results showed that the presented method is feasible and acceptable. Project supported by the Natural Science Foundation of China (NSFC: 69934030) and the Zhejiang Provincial Natural Science Foundation of China (ZJPNSFC: ZD9905).     

线性二次型最优控制器的MATLAB实现

本文通过事例介绍了利用MATLAB设计线性二次型最优控制器问题的基本方法，并讨论了参数变化对最优控制系统的影响。     

电动代步车智能控制器的研制

研制以P87LPC768单片机为核心的电动代步车智能控制器,具有过流、欠压保护及调速电位器、和刹车故障保护及报警功能。经试车运行表明该控制器运行平稳、可靠性高。文中介绍了控制器的软硬件设计。     

Optimization of block-floating-point realizations for digital controllers with finite-word-length considerations

The closed-loop stability issue of finite-precision realizations was investigated for digital controllers implemented in block-floating-point format. The controller coefficient perturbation was analyzed resulting from using finite word length (FWL) block-floating-point representation scheme. A block-floating-point FWL closed-loop stability measure was derived which considers both the dynamic range and precision. To facilitate the design of optimal finite-precision controller realizations, a computationally tractable block-floating-point FWL closed-loop stability measure was then introduced and the method of computing the value of this measure for a given controller realization was developed. The optimal controller realization is defined as the solution that maximizes the corresponding measure, and a numerical optimization approach was adopted to solve the resulting optimal realization problem. A numerical example was used to illustrate the design procedure and to compare the optimal controller realization with the initial realization.     

基于PCA-CMAC的设备性能退化评估

提出了一种用于设备性能退化评估的PCA-CMAC(主成分分析-小脑模型节点控制器)模型.该模型利用PCA进行特征提取,去除多个传感器信号特征的冗余信息,并且减少CMAC的输入维数;利用CMAC的局部泛化能力定量地评估设备的性能退化.给出了模型的实现过程,并将模型应用于钻削过程刀具状态的评估,试验结果证明该模型能基于刀具的正常状态,对刀具的磨损状态进行定量的评估.分析了CMAC中泛化参数g和量化参数r对评估结果的影响,g越大,CMAC的泛化能力越好,但各退化状态之间的区别越不明显;r越小,各退化状态之间越容易区分,但所需的权存储空间越大.2个参数的基本选择原则是CMAC的权存储空间应尽量小,与此同时,各退化状态之间应容易区分.     

卫星运动补偿技术初步研究

在建立卫星姿态运动学方程与姿态动力学方程的基础上,设计了姿态控制器,仿真结果表明该控制系统具有较好的动态和稳态性能;结合有效载荷的两维伺服控制系统模型,提出了卫星运动补偿方案。使用高精度星敏感器与陀螺组合姿态确定的软件,在各种干扰力矩作用下,对卫星运动补偿进行了数学仿真。结果表明,该方案可以提高有效载荷光轴指向精度和指向稳定度。