Experimental Research Of Hardware-in-the-loop Simulation Of Active Vibration Control System Based On DSPACE

With increasing strict requirement of ship noise and vibration level by IMO, activevibration control technique, for its better disturb frequency variable adaptability and controlperformance at low frequencies, gradually becomes an advancing research aspect in the fieldof ship vibration engineering at present. Based on active vibration control technique, how torapidly and effectively build and optimize the control systems corresponding to differentcontrol objects becomes the problem to be solved in the process of active vibration controltechnique engineering application. Hardware-in-the-loop simulation technique provideseffective, reliable application platform for the development of control system and on-line testof controller. In this paper, RCP experimental platform (the double stage vibration isolationbench as a controlled object) is built based on the software and hardware platform of thedSPACE DS1103single-board system; The double stage vibration isolation bench model thatcan be used for HILS is built based on SIMULINK/SimMechanics, and the validity of thismodel and the feasibility of using for modeling rapidly and research on HILS are verified.First of all, the natural characteristics of double-stage vibration isolation bench areanalyzed in the article. The weight coefficients of two secondary paths are obtained throughadaptive off-line identification experiment of secondary path based on dSPACE. And then theeffectiveness and correctness of Filtered x-LMS control algorithm are verified by the off-linesimulation based on SIMULINK that analyzed dynamic performance of the algorithm forsingle and dual-frequency excitation.Secondly, control algorithm model portion is preserved in the model of the off-linesimulation program, and the portion is added in corresponding dSPACE RTI I/O port modulethat can be connected to the external signal generator, acquisition and driving device toimplement the communication, and the active vibration control RCP experimental platformbased on dSPACE is built. Based on seamless connection technique between dSPACE/RTIand SIMULINK/RTW, and control algorithm model can be generated into real-time C codethat can be real-time operated on the dSPACE DS1103PPC processor where C code connectsand downloads as a prototyping controller. The RCP experiment is made for75Hz,90Hzsingle-frequency sinusoidal signal excitation source with41dB and60dB vibration reductionrespectively, whereas one made for70Hz,93Hz dual-frequency sinusoidal signal excitation source with6dB and12dB vibration reduction respectively.Finally, active control of double-stage vibration isolation system model is built based onSIMULINK/SimMechanics. Through simulation research of this active control system modelunder single-frequency excitation source and dual-frequency excitation source, thereasonability of the bench model is verified for the better control effect on vibration response,which lays the foundation for HILS and performance test of active vibration controller.