永磁同步电机滑模调速系统新型趋近律控制

为了提高永磁同步电机(permanent magnet synchronous motor)的控制性能,解决传统趋近律中存在的抖振和响应速度慢等问题,提出一种新型滑模趋近律。该趋近律是在双幂次趋近律的基础上,加入变指数趋近律,提高了系统的响应速度,同时引入系统的状态变量,抑制了变指数部分在接近滑模面时的抖振。通过理论证明了该趋近律具有存在性、可达性和稳定性。并与双幂次趋近律进行了性能控制比较,结果显示新型趋近律具有更快的收敛速度和控制性能。基于该滑模趋近律设计了永磁同步电机滑模控制器,并与传统的PI控制器做仿真比较。仿真和实验结果显示,采用新型趋近律的滑模控制器系统具有更强的鲁棒性和更快的收敛速度,在抑制系统抖振方面具有更优的能力,结果验证了所提出方法的有效性。

PMSM Sliding Mode Control Based on a Novel Reaching Law

To improve the performance of speed control in the permanent magnet synchronous motor and to solve the problems of system chattering and slowly reaching speed in the regular reaching law, a novel reaching law was proposed. This novel reaching law adds variable exponential reaching law to the double power reaching law, which can simultaneously improve the system response speed. The system state variables has good effect on inhabiting the chattering problem caused by variable index term. It is indicated through theoretical analysis that the system under the proposed reaching law has existence, accessibility and stability. And compared novel reaching law with the double power reaching law, the results show that novel reaching law has faster reaching speed and great control performance. The sliding mode controller was designed based on this novel reaching law, and compared with traditional PI controller. Simulation and experiment results demonstrate that controller based on the novel reaching law has stronger robustness, faster reaching speed and better ability to inhabit system chattering. The results validate the feasibility and effectiveness of the proposed reaching law.