变频节流调速半主动式升沉补偿系统设计

Design of semi-active heave compensation system based on frequency conversion and throttling speed control technology

为保证船用起重机不受海上波浪影响,安全高效地完成吊装作业,并且在现有半主动式升沉补偿系统的基础上进一步减少系统能量损失,提高系统效率,设计了变频节流调速半主动式升沉补偿系统。通过采用变频液压调速技术实现全局功率匹配,同时保留阀控组件,以期能够同时满足系统对位置控制精度和能量消耗的要求,并利用AMESim和Simulink软件分别建立了液压系统和变频电机的仿真模型,通过联合仿真对系统的补偿及节能效果进行了验证分析。结果表明,该系统对随机波的补偿精度可达99.7%,并且能量消耗仅为相同工况下普通阀控主动式系统的25.6%,节能效果显著。

To ensure that marine crane is immune from sea waves and performs hoisting safely and efficiently, and to further reduce energy loss of the existing semi-active heave compensation system, the paper proposes a semi-active heave compensation system based on frequency conversion and throttling speed control technology. Variable frequency hydraulic speed governing technology is used for overall power matching, and valve control components are still used, hoping that position control accuracy and energy consumption of the system satisfy relevant requirements. Software AMESim and Simulink are used to establish simulation model for hydraulic system and variable frequency motor.Moreover, compensation and energy saving effects of the system are verified through joint simulation. The results show that compensation accuracy of the system for random waves is high up to 99.7% with energy consumption only 25.6% of that of ordinary valve-controlled active system under the same conditions, thus proving that the system can greatly save energy.