An improved algorithm on magnification of cambered-plate moment limiter in tower crane

Cambered-plate moment limiter in tower crane is an over-load safety protection device. The cambered-plate deflection caused by its deformation can be used to represent the load moment of tower crane. However, inaccurate calculation of magnification exists in limiter design, which results in the moment deviation of the crane. This paper proposed an algorithm to improve the magnification accuracy. The analytical formula of magnification was derived based on mechanics analysis, and the parameters in the analytical formula were calculated. Meanwhile, software simulation was used to prove the validity of the analytical formula. The results have demonstrated that the magnification accuracy can be increased by the improved algorithm.