deficiency loop的意思|示意

A major deficiency of piezoelectric actuators is that their open-loop control accuracy is seriously limited by hysteresis.

压电陶瓷存在迟滞现象，开环定位精度受到严重影响。

An unusual high speed test was conducted on the Loop Track under the conditions of small radius, big superelevation and large deficiency of superelevation.

环行道的高速试验是在小半径，大超高，大欠超高下进行的，有着其特殊意义。