在系统分析与设计过程中,针对高阶动态系统所具有的时滞性,常常利用具有延迟环节的一阶(first order plus time delay,FOPTD)或者二阶系统(second order plus time delay,SOPTD)模型对其进行近似处理,由于建模误差过大影响所描述系统的...在系统分析与设计过程中,针对高阶动态系统所具有的时滞性,常常利用具有延迟环节的一阶(first order plus time delay,FOPTD)或者二阶系统(second order plus time delay,SOPTD)模型对其进行近似处理,由于建模误差过大影响所描述系统的准确性和控制性能。本文给出了具有延迟环节的新型非整数阶类一阶系统模型(non-integer order plus time delay,NIOPTD),并分别设计了某高阶系统降阶得到的传统模型与新型类一阶系统近似模型,对比分析新型类一阶系统模型的优点与可行性。针对上述3种系统模型(FOPTD、SOPTD、NIOPTD)在频域内给出分数阶PIλDμ控制器新的参数整定方法,通过仿真对比分析得出方法的有效性,并证实分数阶PIλDμ控制器作用于NIOPTD模型具有最好的控制性能和鲁棒稳定性。展开更多
A new type of PID controller is introduced and some properties are given. The novelty of the proposed controller consists in the extension of derivation and integration order from integer to non-integer order. The PI...A new type of PID controller is introduced and some properties are given. The novelty of the proposed controller consists in the extension of derivation and integration order from integer to non-integer order. The PIλDμ controller generally has three advantages when compared to the integerl-order controller: the first is that it has more degrees of freedom in the model; the second is that it has a memory in model,the memory insure the history and its impact to present and future,the third is it ensures the stability of missile. This approach provides a more flexible tuning strategy and therefore an easier achieving of control requirements. Flight dynamic model of an aerodynamic missile is taken into account in implementing the PIλDμ controller. Simulation results show that the PIλDμ controller is not sensitive to the changes of control parameters and the system parameters. Also,the controller has more flexible structure and stronger robustness.展开更多
针对机器人焊接过程中的焊缝跟踪性能问题,提出一种分数阶PI^λD^μ控制方法。首先根据分数阶的原理,设计分数阶PI^λD^μ控制器,然后应用混合粒子群算法(HPSO)优化分数阶PI^λD^μ控制器的5个参数(kP, kI, kD,l,m),该算法以粒子群算法...针对机器人焊接过程中的焊缝跟踪性能问题,提出一种分数阶PI^λD^μ控制方法。首先根据分数阶的原理,设计分数阶PI^λD^μ控制器,然后应用混合粒子群算法(HPSO)优化分数阶PI^λD^μ控制器的5个参数(kP, kI, kD,l,m),该算法以粒子群算法为基础,融合遗传算法交叉,变异的特点,提升全局搜索能力。采用改进的误差绝对值时间积分函数(ITAE)作为优化目标,对系统进行多种信号仿真,结果表明HPSO-分数阶PI^λD^μ控制器收敛速度快,精度高,鲁棒性强,达到了预期的控制目的。展开更多
文摘在系统分析与设计过程中,针对高阶动态系统所具有的时滞性,常常利用具有延迟环节的一阶(first order plus time delay,FOPTD)或者二阶系统(second order plus time delay,SOPTD)模型对其进行近似处理,由于建模误差过大影响所描述系统的准确性和控制性能。本文给出了具有延迟环节的新型非整数阶类一阶系统模型(non-integer order plus time delay,NIOPTD),并分别设计了某高阶系统降阶得到的传统模型与新型类一阶系统近似模型,对比分析新型类一阶系统模型的优点与可行性。针对上述3种系统模型(FOPTD、SOPTD、NIOPTD)在频域内给出分数阶PIλDμ控制器新的参数整定方法,通过仿真对比分析得出方法的有效性,并证实分数阶PIλDμ控制器作用于NIOPTD模型具有最好的控制性能和鲁棒稳定性。
文摘A new type of PID controller is introduced and some properties are given. The novelty of the proposed controller consists in the extension of derivation and integration order from integer to non-integer order. The PIλDμ controller generally has three advantages when compared to the integerl-order controller: the first is that it has more degrees of freedom in the model; the second is that it has a memory in model,the memory insure the history and its impact to present and future,the third is it ensures the stability of missile. This approach provides a more flexible tuning strategy and therefore an easier achieving of control requirements. Flight dynamic model of an aerodynamic missile is taken into account in implementing the PIλDμ controller. Simulation results show that the PIλDμ controller is not sensitive to the changes of control parameters and the system parameters. Also,the controller has more flexible structure and stronger robustness.
文摘针对机器人焊接过程中的焊缝跟踪性能问题,提出一种分数阶PI^λD^μ控制方法。首先根据分数阶的原理,设计分数阶PI^λD^μ控制器,然后应用混合粒子群算法(HPSO)优化分数阶PI^λD^μ控制器的5个参数(kP, kI, kD,l,m),该算法以粒子群算法为基础,融合遗传算法交叉,变异的特点,提升全局搜索能力。采用改进的误差绝对值时间积分函数(ITAE)作为优化目标,对系统进行多种信号仿真,结果表明HPSO-分数阶PI^λD^μ控制器收敛速度快,精度高,鲁棒性强,达到了预期的控制目的。
