动态力解耦和动态标定相关技术研究综述

随时间变化的力称作为动态力,其在航空航天、材料科学、汽车制造、武器威力等研究领域均为重要的测量参数。理想情况下,动态力测试与其他传感器输出无关,涉及的仅仅是测试通道方向的输出。但是,由于加工工艺、安装工艺等限制,在测量某方向动态力时,难免耦合其他方向的输出信号造成动态耦合,只有准确的找到各维间力的相互耦合关系,才可以达到精确测量动态力的目的。同时,在测试前应先标定传感器,以提高测量的准确性。目前多采用静态标定进行动态力测量的“静标使用”方法,在测量中必然会产生较大的误差。因此,动态力的解耦及动态标定具有较大的意义。通过分析相关文献,总结了动态力解耦和动态力标定的常用方法,对比优缺点并提出展望。

Decoupling control and zero dynamics stabilization for shunt hybrid active power filter

An inverse system method based optimal control strategy was proposed for the shunt hybrid active power filter （SHAPF） to enhance its harmonic elimination performance. Based on the inverse system method, the d-axis and q-axis current dynamics of the SHAPF system were decoupled and linearized into two pseudolinear subsystems. Then, an optimal feedback controUer was designed for the pseudolinear system, and the stability condition of the resulting zero dynamics was presented. Under the control strategy, the current dynamics can asymptotically converge to their reference states and the zero dynamics can be bounded. Simulation results show that the proposed control strategy is robust against load variations and system parameter mismatches, its steady-state performance is better than that of the traditional linear control strategy.