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基于功率平衡的直流母线电压控制策略研究 被引量:1
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作者 刘海珍 贺皎 王能才 《工业仪表与自动化装置》 2018年第3期124-128,共5页
针对含有储能元件的分布式发电系统存在直流母线电压难以准确控制的缺点,提出了将PR控制器和PI-type调节器相结合的控制方法来实现直流母线电压的稳定控制。PR控制器对频率为谐振频率的正弦信号可以实现无静差控制,PI-type调节器在谐振... 针对含有储能元件的分布式发电系统存在直流母线电压难以准确控制的缺点,提出了将PR控制器和PI-type调节器相结合的控制方法来实现直流母线电压的稳定控制。PR控制器对频率为谐振频率的正弦信号可以实现无静差控制,PI-type调节器在谐振频率处进行零极点的补偿来实现静态误差的控制。通过PI-type调节器后的电流与交流侧输出电流进行比较,产生的开关信号调节占空比来实现对直流母线电压的控制。仿真结果表明交直流混合微电网在孤岛模式下交流侧母线电压不稳定时,该文方法能使直流母线侧电压实现稳定控制,且交流侧电压和电流的畸变率都能够满足正常运行的要求,从而提高了整个系统的抗扰动能力。 展开更多
关键词 pi-type调节器 PR控制器 分布式发电 交直流混合微电网
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Biped robot control strategy and open-closed-loop iterative learning control
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作者 WANG Binrui XIE Hualong +1 位作者 CONG Dehong XU Xinhe 《Frontiers of Electrical and Electronic Engineering in China》 CSCD 2007年第1期104-107,共4页
Master-slaver dual-leg coordination control was proposed for the biped robot with heterogeneous legs(BRHL),in order to reduce gait planning and to get a good tracking performance.The key to coordination is gait trajec... Master-slaver dual-leg coordination control was proposed for the biped robot with heterogeneous legs(BRHL),in order to reduce gait planning and to get a good tracking performance.The key to coordination is gait trajectory tracking control.Bionic knee joint with closed-chain 4links makes robot walking more humanlike,but the model is complex and tracking of the bionic leg to the artificial leg is more difficult.P-type open-closed-loop iterative learning control(ILC)is not based on model parameters and has advantages in both open-loop and closed-loop ILC;so this paper proposes a complex robot gait trajectory tracking.The convergence is proved by using functional analysis and the stability condition is given.A tracking simulation based on the virtual prototype was done.The results show that this control strategy and algorithm are effective and robust,and the convergence speed is better than separate open-loop or closed-loop ILC. 展开更多
关键词 BRHL tracking bionic knee joint open-closed-loop iterative learning control convergence virtual prototype
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