基于参数局部最优化理论的电励磁直线同步电机自适应速度控制

Adaptive Speed Control of Electrically Excited Linear Synchronous Motor Based on Parametric Local Optimization Theory

建立适合速度控制器设计的电励磁直线同步电机连续时间数学模型,通过合理的假设建立初级电枢交轴电压与初级机械速度之间的单输入单输出传递函数。采用局部参数最优化梯度法设计了自适应速度控制器,仅含有一个积分器、一个乘法器以及2个比例单元。自适应速度控制器无传统控制器的电流内环加快了响应速度,简化了系统结构。利用MATLAB数值计算软件仿真所设计的控制器,分析自适应增益调节系数与广义误差反馈系数等因素对自适应速度控制系统稳定性与收敛性的影响,仿真结果验证了该自适应速度控制策略的有效性。

The continuous time mathematical model of electrically excited linear synchronous motor is established,which is suitable for the design of speed controller.A single-input-single-output transfer function between the primary quadrature axis voltage and the primary mechanical speed is established with reasonable assumptions.An adaptive speed controller is designed by using local parameter optimization gradient method,which consists of only one integrator,one multiplier and two proportional elements.The adaptive speed controller without the traditional current loop accelerates the response speed and simplifies the system structure.The controller designed by MATLAB numerical simulation software is used to analyze the influence of the factors such as the adaptive gain adjustment coefficient and the generalized error feedback coefficient on the stability and convergence of the adaptive speed control system.Simulation results show the effectiveness of the adaptive speed control strategy.