A speed control analysis for an in-line gasoline fueled internal combustion （IC） engine is presented for the purpose of alleviation of high frequency oscillations in engine revolutions. A dynamic cylinder-by-cylinde...A speed control analysis for an in-line gasoline fueled internal combustion （IC） engine is presented for the purpose of alleviation of high frequency oscillations in engine revolutions. A dynamic cylinder-by-cylinder model is proposed, base on slider-crank mechanism, which is extended to develop a digital governor providing a high fidelity estimation of rotary speed oscillation for hybrid vehicle engines. A modified PID controller that P and I gain is placed in feedback path is also described for hybrid electric vehicle （HEV） engine speed regulation, By comparison between measured and estimated signals, it is demonstrated that a good agreement has been achieved and the governor behaves an excellent damping speed ripple.展开更多
冲压空气涡轮系统(Ram Air Turbine, RAT)是飞机应急能源系统,紧急情况下为飞机提供应急能源,用于飞机的操控。在分析涡轮调速机构原理基础上,建立了涡轮部件调速机构的动力学方程,并在AMESim中建立了涡轮部件仿真模型。分析了RAT液压...冲压空气涡轮系统(Ram Air Turbine, RAT)是飞机应急能源系统,紧急情况下为飞机提供应急能源,用于飞机的操控。在分析涡轮调速机构原理基础上,建立了涡轮部件调速机构的动力学方程,并在AMESim中建立了涡轮部件仿真模型。分析了RAT液压泵的原理,结合柱塞液压泵调压、卸荷原理,建立了RAT液压泵的动力学方程,并在AMESim中建立RAT液压泵仿真模型。在涡轮部件和RAT液压泵模块基础上,建立液压模式RAT系统仿真模型,分析了液压模式RAT的性能,为液压模式RAT的设计和分析提供了一种方法。展开更多
建立了考虑水电站引水系统水锤效应的弹性水体水轮机模型,并据此构建了水轮机调速系统模型。针对水轮机调速系统具有参数不确定性、存在干扰等特点,运用H∞鲁棒控制理论,提出了水轮机调速系统H∞双回路鲁棒控制策略,以水门开度偏差为补...建立了考虑水电站引水系统水锤效应的弹性水体水轮机模型,并据此构建了水轮机调速系统模型。针对水轮机调速系统具有参数不确定性、存在干扰等特点,运用H∞鲁棒控制理论,提出了水轮机调速系统H∞双回路鲁棒控制策略,以水门开度偏差为补偿信号构建了内环反馈回路,以发电机转速偏差为补偿信号构建了外环反馈回路。仿真结果验证了该控制策略的有效性,而且其时域性能指标明显优于传统比例–微分–积分(proportional integral derivative,PID)调节器控制效果。展开更多
基金This project is supported by National Hi-tech Research and Development Program of China(863 Program, No.2001AA501211).
文摘A speed control analysis for an in-line gasoline fueled internal combustion （IC） engine is presented for the purpose of alleviation of high frequency oscillations in engine revolutions. A dynamic cylinder-by-cylinder model is proposed, base on slider-crank mechanism, which is extended to develop a digital governor providing a high fidelity estimation of rotary speed oscillation for hybrid vehicle engines. A modified PID controller that P and I gain is placed in feedback path is also described for hybrid electric vehicle （HEV） engine speed regulation, By comparison between measured and estimated signals, it is demonstrated that a good agreement has been achieved and the governor behaves an excellent damping speed ripple.
文摘冲压空气涡轮系统(Ram Air Turbine, RAT)是飞机应急能源系统,紧急情况下为飞机提供应急能源,用于飞机的操控。在分析涡轮调速机构原理基础上,建立了涡轮部件调速机构的动力学方程,并在AMESim中建立了涡轮部件仿真模型。分析了RAT液压泵的原理,结合柱塞液压泵调压、卸荷原理,建立了RAT液压泵的动力学方程,并在AMESim中建立RAT液压泵仿真模型。在涡轮部件和RAT液压泵模块基础上,建立液压模式RAT系统仿真模型,分析了液压模式RAT的性能,为液压模式RAT的设计和分析提供了一种方法。
文摘建立了考虑水电站引水系统水锤效应的弹性水体水轮机模型,并据此构建了水轮机调速系统模型。针对水轮机调速系统具有参数不确定性、存在干扰等特点,运用H∞鲁棒控制理论,提出了水轮机调速系统H∞双回路鲁棒控制策略,以水门开度偏差为补偿信号构建了内环反馈回路,以发电机转速偏差为补偿信号构建了外环反馈回路。仿真结果验证了该控制策略的有效性,而且其时域性能指标明显优于传统比例–微分–积分(proportional integral derivative,PID)调节器控制效果。
