为了提高无刷直流电机(Brushless DC motor,BLDCM)的抗负载扰动性能和鲁棒性,削弱传统整数阶滑模控制(Sliding model control,SMC)中的抖振现象,针对BLDCM调速系统设计了一种分数阶(Fractional order,FO)滑模控制器。采用分数阶滑模面,...为了提高无刷直流电机(Brushless DC motor,BLDCM)的抗负载扰动性能和鲁棒性,削弱传统整数阶滑模控制(Sliding model control,SMC)中的抖振现象,针对BLDCM调速系统设计了一种分数阶(Fractional order,FO)滑模控制器。采用分数阶滑模面,同时利用分数阶传递能量缓慢的特性对具有二阶滑模特性的快速幂次趋近律进行改进,有效地削弱了滑模变结构控制带来的系统抖振。仿真结果表明,相比于传统整数阶滑模控制,所提方法可使BLDCM调速系统具有较好的控制性能。展开更多
Due to the coaxial connection of engine, motor and pump, the dynamic characteristics of hybrid construction machinery are changed, which generates a new torsional vibration problem of multi-power sources. To reduce th...Due to the coaxial connection of engine, motor and pump, the dynamic characteristics of hybrid construction machinery are changed, which generates a new torsional vibration problem of multi-power sources. To reduce the torsional vibration of the hybrid construction machinery complex shafting, torsional vibration active control was proposed. The three-mass model of coaxial shafting of hybrid construction machinery was established. The PID control and the fuzzy sliding mode control were chosen to weaken torsional vibration by controlling the motor speed and torque. The simulation results show that the fuzzy sliding mode control has 12% overshoot of the PID control when the engine torque changes. The active control is effective and can realize smooth power switch.展开更多
文摘为了提高无刷直流电机(Brushless DC motor,BLDCM)的抗负载扰动性能和鲁棒性,削弱传统整数阶滑模控制(Sliding model control,SMC)中的抖振现象,针对BLDCM调速系统设计了一种分数阶(Fractional order,FO)滑模控制器。采用分数阶滑模面,同时利用分数阶传递能量缓慢的特性对具有二阶滑模特性的快速幂次趋近律进行改进,有效地削弱了滑模变结构控制带来的系统抖振。仿真结果表明,相比于传统整数阶滑模控制,所提方法可使BLDCM调速系统具有较好的控制性能。
基金Project(51205415)supported by the National Natural Science Foundation of ChinaProject(14JJ3020)supported by the Natural Science Foundation of Hunan Province,China+2 种基金Project(2013M542129)supported by China Postdoctoral Science FoundationProject(2012QNZT014)supported by the Fundamental Research Funds for the Central Universities,ChinaProject supported by the Postdoctoral Foundation of Central South University,China
文摘Due to the coaxial connection of engine, motor and pump, the dynamic characteristics of hybrid construction machinery are changed, which generates a new torsional vibration problem of multi-power sources. To reduce the torsional vibration of the hybrid construction machinery complex shafting, torsional vibration active control was proposed. The three-mass model of coaxial shafting of hybrid construction machinery was established. The PID control and the fuzzy sliding mode control were chosen to weaken torsional vibration by controlling the motor speed and torque. The simulation results show that the fuzzy sliding mode control has 12% overshoot of the PID control when the engine torque changes. The active control is effective and can realize smooth power switch.
