变负载控制在自由活塞内燃发电机的缸压控制中的应用  

Application of variable-load control in cylinder pressure control of free-piston engine generator

作　　者：李龙[1] 张幽彤[1] 左正兴[1] 

机构地区：[1]北京理工大学机械与车辆学院,北京100081

出　　处：《吉林大学学报（工学版）》2018年第2期473-479,共7页Journal of Jilin University:Engineering and Technology Edition

基　　金：国家自然科学基金项目(51675043)

摘　　要：为有效控制自由活塞内燃发电机的缸压,提出了变负载控制约束活塞运动的方法。通过构造可变等效负载实现对系统回路总阻抗的控制,回路电流因此发生变化,使作用在发电机动子上的电磁阻力也发生改变,由于发电机动子和活塞刚性连接,从而实现对活塞运动的约束。为使电磁力能按照期望的规律变化,研究中设计了变负载控制的闭环控制策略。仿真结果表明,应用该控制策略的变负载控制可以使活塞运动趋于稳定,从而实现对缸压的稳定控制。In order to control the cylinder pressure of free-piston engine generator,a variable-load control method is proposed.The control of the total impedance of the system circuit is achieved by the construction of a variable equivalent load,so that the loop current is changed,and then the electromagnetic resistance acting on the mover changes.In order to make the electromagnetic force change in accordance with the expected law,a closed-loop control strategy is designed.Simulation results show that,using this control strategy,the proposed variable-load control method can stabilize the piston motion,thus achieving a stable cylinder pressure.

关 键 词：动力机械工程 自由活塞内燃发电机 变负载控制 等效负载 缸压控制 

分 类 号：TK441[动力工程及工程热物理—动力机械及工程]