高频电液激振器相位同步控制的研究
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摘要
建立了电液激振器的数学模型,运用龙格-库塔法编制数值仿真程序研究了活塞位移与2D阀阀芯转速、轴向滑动位移之间的关系,给出了激振器的相频曲线并对相频曲线进行了分析讨论,最后建立试验装置对仿真结果进行了验证。理论分析和方针结果表明:当激振频率范围为固有频率的0.048～0.870倍时,活塞位移的相位变化很小;采用2D阀控电液激振器构成的多轴疲劳试验系统在该频段可以实现开环同步控制。
A mathematical model of electrohydraulic vibration exciter was established;the relation among piston displacement of cylinder,the rotary speed and axial sliding of spool was studied by using the numerical simulation program in Runge-Kutta method,the phase-frequency waveform of the exciter was given and discussed.Finally the test equipment was established to verify the simulation results.It is classified that phase difference is changed little while the ratio value between the excitation frequency and natural frequency is in 0.048~0.870.So the phase synchronization can be achieved in multi-axis fatigue test system consisting of electrohydraulic vibration exciter controlled by 2D valve among that frequency band.
A mathematical model of electrohydraulic vibration exciter was established;the relation among piston displacement of cylinder,the rotary speed and axial sliding of spool was studied by using the numerical simulation program in Runge-Kutta method,the phase-frequency waveform of the exciter was given and discussed.Finally the test equipment was established to verify the simulation results.It is classified that phase difference is changed little while the ratio value between the excitation frequency and natural frequency is in 0.048~0.870.So the phase synchronization can be achieved in multi-axis fatigue test system consisting of electrohydraulic vibration exciter controlled by 2D valve among that frequency band.
引文
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[2]BlekhamI I,Fradkov AL,Tomchina OP,et al.Self-synchronization and Controlled Synchronization:General Definition and Example Design[J].Mathematics and Computers in Simulation,2002,58(4/6):367-384.
[3]Wen B C,Guan L Z.Synchronization Theory of Self Synchronous Vibrating Machines with Two Asymmetrical Vibrators[C]//Proceedings of Interna-tional Conference on Mechanical Dynamics.Shenyang,1987:434-439.
[4]韩俊伟,丁丽民,赵慧,等.地震模拟振动台三状态控制的研究[J].哈尔滨工业大学学报,1999,31(3):21-24.
[5]袁宏杰,李传日.正弦加随机振动控制技术的研究[J].航空学报,2002,21(4):383-384.
[6]闻邦椿,赵春雨,范俭.机械系统同步理论的应用与发展[J].振动工程学报,1997,10(3):264-272.
[7]Bai E W,Lonngren K E.Synchronization and Control of Chaotic Systems[J].Chao,Solitons&Fractal,1999,10(9):1571-1575.
[8]Glass L.Synchronization and Rhythmic Processes in Physio1ogy[J].Nature,200l,410:277-284.
[9]闻邦椿,刘树英,何勍.振动机械的理论与动态设计方法[M].北京:机械工业出版社,2001.
[10]Ruan J,Burton R T.An Electrohydraulic Vibration Exciter Using a Two-dimensional Valve[J].Pro-ceedings of the Institution of Mechanical Engineers,Part I:Journal of Systems and Control Engineering,2009,223(2):135-147.
[11]骆涵秀,李世伦,朱捷,等.机电控制[M].杭州:浙江大学出版社,1993.
[12]张尚才.控制工程基础[M].杭州:浙江大学出版社,2003.
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