The direct torque control of the dual star induction motor(DTC-DSIM) using conventional PI controllers is characterized by unsatisfactory performance, such as high ripples of torque and flux, and sensitivity to parame...The direct torque control of the dual star induction motor(DTC-DSIM) using conventional PI controllers is characterized by unsatisfactory performance, such as high ripples of torque and flux, and sensitivity to parametric variations. Among the most evoked control strategies adopted in this field to overcome these drawbacks presented in classical drive, it is worth mentioning the use of the second order sliding mode control(SOSMC) based on the super twisting algorithm(STA) combined with the fuzzy logic control(FSOSMC). In order to realize the optimal control performance, the FSOSMC parameters are adjusted using an optimization algorithm based on the genetic algorithm(GA). The performances of the envisaged control scheme, called G-FSOSMC, are investigated against G-SOSMC, G-PI and BBO-FSOSMC algorithms. The proposed controller scheme is efficient in reducing the torque and flux ripples, and successfully suppresses chattering. The effects of parametric uncertainties do not affect system performance.展开更多
机械控制的 L PG/柴油双燃料发动机难以保证 L PG与柴油的最佳掺烧比 ,满足低碳烟排放 ,低油耗的要求。本文将模糊控制算法应用于 L PG流量的控制 ,设计了以 87C5 5 2单片机为核心的模糊智能控制系统 ,应用于改装后的 L PG/柴油双燃料...机械控制的 L PG/柴油双燃料发动机难以保证 L PG与柴油的最佳掺烧比 ,满足低碳烟排放 ,低油耗的要求。本文将模糊控制算法应用于 L PG流量的控制 ,设计了以 87C5 5 2单片机为核心的模糊智能控制系统 ,应用于改装后的 L PG/柴油双燃料发动机。以发动机转速和油门拉杆位置为输入量 ,L PG流量为控制量 ,控制规则设计离线进行 ,通过控制量决策表对 L PG流量进行智能控制 ,使发动机的碳烟排放大幅降低 ,燃油消耗有所下降。该系统具有较好的自适应性和鲁棒性。展开更多
针对分布式混合流水线生产的生产调度问题,模拟实际排产中的排产到线和排产到时的排产策略,提出了基于改进双层嵌套式遗传算法的两层优化模型。外层依据流水线分配平衡和准时交货等基本原则总体上解决生产订单在流水线之间的分配问题,...针对分布式混合流水线生产的生产调度问题,模拟实际排产中的排产到线和排产到时的排产策略,提出了基于改进双层嵌套式遗传算法的两层优化模型。外层依据流水线分配平衡和准时交货等基本原则总体上解决生产订单在流水线之间的分配问题,内层以最小生产时间为主要目的求解流水线的生产订单生产次序问题。考虑到双层嵌套式遗传算法的时间复杂性,基于模糊逻辑理论设计了一种模糊控制器来动态调整遗传算子,并采用主动检测停止方法,提高算法效率。使用某空调工厂的实际生产数据验证了算法的可行性、计算结果的准确性及排产策略的有效性,为高级计划与排程(Advanced Planning and Scheduling,APS)中大规模复杂供应链调度问题提供了可借鉴的方法。展开更多
基金Project supported by the LEB Research LaboratoryDepartment of Electrical Engineering,University of Batna 2, Algeria。
文摘The direct torque control of the dual star induction motor(DTC-DSIM) using conventional PI controllers is characterized by unsatisfactory performance, such as high ripples of torque and flux, and sensitivity to parametric variations. Among the most evoked control strategies adopted in this field to overcome these drawbacks presented in classical drive, it is worth mentioning the use of the second order sliding mode control(SOSMC) based on the super twisting algorithm(STA) combined with the fuzzy logic control(FSOSMC). In order to realize the optimal control performance, the FSOSMC parameters are adjusted using an optimization algorithm based on the genetic algorithm(GA). The performances of the envisaged control scheme, called G-FSOSMC, are investigated against G-SOSMC, G-PI and BBO-FSOSMC algorithms. The proposed controller scheme is efficient in reducing the torque and flux ripples, and successfully suppresses chattering. The effects of parametric uncertainties do not affect system performance.
文摘机械控制的 L PG/柴油双燃料发动机难以保证 L PG与柴油的最佳掺烧比 ,满足低碳烟排放 ,低油耗的要求。本文将模糊控制算法应用于 L PG流量的控制 ,设计了以 87C5 5 2单片机为核心的模糊智能控制系统 ,应用于改装后的 L PG/柴油双燃料发动机。以发动机转速和油门拉杆位置为输入量 ,L PG流量为控制量 ,控制规则设计离线进行 ,通过控制量决策表对 L PG流量进行智能控制 ,使发动机的碳烟排放大幅降低 ,燃油消耗有所下降。该系统具有较好的自适应性和鲁棒性。
文摘针对分布式混合流水线生产的生产调度问题,模拟实际排产中的排产到线和排产到时的排产策略,提出了基于改进双层嵌套式遗传算法的两层优化模型。外层依据流水线分配平衡和准时交货等基本原则总体上解决生产订单在流水线之间的分配问题,内层以最小生产时间为主要目的求解流水线的生产订单生产次序问题。考虑到双层嵌套式遗传算法的时间复杂性,基于模糊逻辑理论设计了一种模糊控制器来动态调整遗传算子,并采用主动检测停止方法,提高算法效率。使用某空调工厂的实际生产数据验证了算法的可行性、计算结果的准确性及排产策略的有效性,为高级计划与排程(Advanced Planning and Scheduling,APS)中大规模复杂供应链调度问题提供了可借鉴的方法。
