脉冲步进调制高压电源远程通讯与反馈控制系统研究

为了满足 HL-2A 装置二级加热系统的高压电源系统的要求,开发了脉冲步进调制(PSM)高压脉冲电 源控制系统。PSM 电源控制系统采用数字信号处理器(DSP)和现场可编程门阵列器件(FPGA)组合控制方式,总计 输出 112 路脉冲。DSP 芯片实现计算、反馈、远程通信等功能,FPGA 主要负责与 DSP 的数据传输及 112 路脉冲 输出的时序控制功能。利用控制器局域网络(CAN)总线实现上位机与 DSP 之间的远程通信功能,上位机采用 LABVIEW 软件实现相关参数的设定与远程通讯。测试结果表明,该控制系统能够实现远程通讯功能,具备快速 的反馈控制功能,满足实验要求。     

Optimal control problems for the reaction–diffusion–convection equation with variable coefficients

The solvability of optimal control problems is proved on both weak and strong solutions of a boundary value problem for the nonlinear reaction–diffusion–convection equation with variable coefficients. In the second case, the requirements for smoothness of the multiplicative control are reduced. The study of extremal problems is based on the proof of the solvability of the corresponding boundary value problems and on the qualitative analysis of their solutions properties. The large data existence results for weak solutions, the maximum principle as well as the local existence and uniqueness of a strong solution are established. Moreover, an optimal feedback control problem is considered. Using methods of the theory of topological degree for set-valued perturbations (with aspheric image sets) of generalized monotone operators, we obtain sufficient conditions for the solvability of this problem in the class of weak solutions.