Research of the Control Strategy and Vibration Test of Linear Motor Driven Piston Pump for Marine Application

In order to solve the problem of large vibration noise,high flow pulsation and simple control mode of the traditional marine pump,this paper proposed a piston pump driven by linear motor. With the linear motor driven piston pump system as the research object,the linear motor driven piston pump working principle of the constant flow was studied and the mathematical model of different motion curve was established. Then,the simulation analysis and experimental test of the linear motor dynamic response for different motion control mode and motion curve were conducted. Experimental results and the conclusions show that the speed planning control program which based on Labview has good controlling characteristics. Servo characteristics of permanent magnet synchronous linear motor can meet the highspeed and high-frequency working requirements of direct-driven reciprocating piston pump. The maximum following error of triangular and S wave velocity curve under PVT motion mode was 87. 5 μm and 91 μm.Either triangular wave velocity curve or S-wave velocity curve,the maximum following error of linear motor under PVT motion mode was less than that of Spline motion mode. It is beneficial to reduce the direct-driven piston pump combination flow pulsation and system vibration. The vibration amplitude of system in the radial direction was weakened by about 70%,and the other direction also had gooddamping effect. A series of vibration experiments demonstrate that the vibration response characteristic of linear motor driven piston pump system is excellent under triangular wave/PVT mode,the vibration of system is greatly weakened.