Investigation On The Semi-physical Simulation Of Active Vibration Control System

In the context of boosting requirement on combat capacity and invisibility on warships,vibration and noise control techniques developed rapidly in recent years.The research focus turned from control algorithms,strategies,and actuators in the initial stage to more compact and integral system.Current development process of active vibration control system is featured with blindness in some aspects,long development circle and heavy costs both manually and financially.Particularly,the traditional researching and development method lacked effective approaches of prediction,detection and evaluation in the research circle.To solve the problems,the model-oriented V-model was employed in the design,development,detection,prediction and evaluation of active vibration control system based on the two-stage structure.And a semi-physical simulation platform is developed for prediction,verification and evaluation.Based on the two-stage structure,system was integrated with signal acquisition system,excitation and monitoring system,actuators,power amplifiers.The multi-rigid-body model and finite element model were built up to analyze structural dynamic characteristics.And modal test and frequency response test were conducted in contrast with the computational results.The active vibration control system was divided into control subsystem and controlled subsystem(controlled object)by the concept of modularization.Based on FXLMS algorithm,offline simulation models and experimental models of active control were established.And corresponding controller was realized by rapid control prototyping techniques.Active vibration control experiment is conducted to verify the effectiveness and validity of the controller.Besides,systematic management of experiments was achieved by relevant software packages.A graphic interface was programmed for real-time data monitoring and parameter tuning.The real-time dynamics simulation model of the controlled object were established based on SimMichanics.And the mass-spring module package was also created.The numerical simulation of the active vibration control was realized based on the real-time dynamic model.The hardware in-the-loop simulation platform was constructed for the active vibration control system for the first time.The numerical simulation results were in consistency with the experimental results,which indicated that the strategy considered with coupled secondary paths performed better than the one without.The hardware-in-the-loop simulation results demonstrated that the platform can be employed as an effective tool to predict performance of active control,evaluating validity,and assessing effectiveness and stability of the controller.