In the article has simulation weighing system with tdn - ac / acs system and calculate its theory value and compare to the value of identified , then has the mass magnitude size . on the other hand in the article utilize a controlling method . and it controlls the hardware , then it can improve the dynamic weighing system performance and minish the error of the dynamic system 由于控制对称量精度影响同样很重要，所以本文还运用了一种控制方法来改善控制过程，由于在不同的环境下，控制的设备不同，系统的一些参数也要变化，这样如果把控制点确定为固定的值，有时误差会很大，本文是在每次识别系统一些参数来改变控制点的大小。
