摘要
为了满足生物材料疲劳系统对开关型功率放大器的性能需求,提出一种基于状态空间反馈的优化控制算法。功率放大器的主回路由移相ZVZCS全桥拓扑构成以实现软开关,减小高频开关损耗和电压应力。采用状态空间平均法,建立动态线性开关模型,以感性负载电流为跟踪目标,逐步优化,设计出一种二次型最优伺服控制器。通过辅助仿真和实验数据分析,证明系统具有良好的动态响应和稳态特性。
A based state-space feedback optimized control is proposed to meet the requirements of the switched power amplifier performance in biomaterial fatigue systems. In order to minimize high-frequency switching losses and voltage stresses, the soft-switched phase-shifting ZVZCS full bridge topology is introduced to construct the power conversion circuit. According to the state-space averaging analysis, a dynamic linear switching model is established. Using the quadratic optimal rule, a servo controller is gradually developed to track the excitation current on inductive load. Good dynamic response and steady state performance of system is proved through the computer-aided simulation and experimental data analysis.
出处
《自动化技术与应用》
2016年第10期18-22,31,共6页
Techniques of Automation and Applications
