CAJ | 학술논문

基于状态反馈精确线性化和二次型最优控制方法,提出了一种新型单相逆变器非线性控制策略.建立了单相全桥逆变器的仿射非线性模型.采用状态反馈精确线性化方法,推导出非线性状态反馈表达式,实现非线性系统的线性化.基于无源性控制思想,提出一种二次型性能指标,利用二次型最优控制对状态反馈系数进行优化设计.该文所提控制系统结构简单,成本低,易于数字实现.数值仿真和实验结果验证了所提方法的正确性.基于所提控制方法的系统输出无稳态误差,输出电压谐波畸变率小,并对负载扰动具有较强的鲁棒性.
기우상태반궤정학선성화화이차형최우공제방법,제출료일충신형단상역변기비선성공제책략.건립료단상전교역변기적방사비선성모형.채용상태반궤정학선성화방법,추도출비선성상태반궤표체식,실현비선성계통적선성화.기우무원성공제사상,제출일충이차형성능지표,이용이차형최우공제대상태반궤계수진행우화설계.해문소제공제계통결구간단,성본저,역우수자실현.수치방진화실험결과험증료소제방법적정학성.기우소제공제방법적계통수출무은태오차,수출전압해파기변솔소,병대부재우동구유교강적로봉성.
Based on state feedback linearization control theory and linear quadratic control theory, a novel single-phase full-bridge inverter control strategy is proposed in the paper. The nonlinear affine model of the system is set up. The nonlinear state feedback transform equation is derived and the nonlinear system is realized linearization via state feedback linearization control theory. Further, this paper proposes a linear quadratic performance target based on passivity considerations. The feedback coefficients are optimized using the linear quadratic control theory. The control scheme proposed has advantage of simple controller structure, low cost and easy to implement with DSP. The validity of the control scheme is verified by numerical simulation and experiment results. Highly accurate steady output, less distorted waveform and strong robust to the disturbance of load are gained based on the proposed control scheme.