This paper presents a novel open-loop speed control method for induction motors that provides high output torque and nearly zero steady-state speed error at any frequency.

提出了一种新颖的感应电机开环速度控制法，在任一频率下，它不但能使电机输出高的力矩，而且使稳态速度误差几乎等于零。

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The compound control mode of speed control and tension control was used and the zero shift of the tension measuring device was compensated and spot-calibrated by software and hardware.

在控制方案上采用速度控制和张力控制的复合控制方式，同时通过软硬件对张力测定仪的零点漂移进行补偿和现场校正。

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According to lift feedback and lift limit, the original servo system of fin stabilizers is improved and lift control system of zero speed fin stabilizers is established.

通过升力反馈和升力限位，对原有减摇鳍随动系统进行改进，建立了升力控制的船舶零航速减摇鳍控制系统。

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