基于LQRI方法的蓄电池充电调节器控制策略

Control strategy based on LQRI technique for battery charging regulation

为提高卫星电源蓄电池充电调节器(BCR)的工作性能,基于带积分环节的线性二次型调节器(LQRI)设计方法提出了一种新型的BCR控制策略。根据BCR的工作机理,获得了系统的小信号数学模型;通过引入状态积分环节,实现了状态方程的扩维;通过定义二次型性能指标函数和加权矩阵,获得了一种新型BCR状态反馈控制策略,有效消除了系统的稳态输出误差。仿真结果验证了所提控制策略的有效性。

To improve the performance of the battery charge regulator （BCR） of satellite power systems,a novel BCR control strategy was proposed using the method of linear quadratic regulator with integral action （LQRI）.Based on the BCR working principle,the small-signal mathematic model was obtained.Then,the system state equation was dimensionally extended by adding two integrals of the state variables.Finally,the linear quadratic performance criterion and the weighting matrix were defined,and a novel state feedback control strategy of the BCR was obtained,which could effectively cancel the system steady-state errors.The effectiveness of the proposed control strategy was verified by simulation results.