Research On Control Algorithm Of Line Vibration Table

In order to improve the measurement accuracy of inertial instrument,it is necessary to develop high-precision inertial device test equipment to improve the measurement level and precision of inertial instrument.As a test equipment which can produce high acceleration,the linear vibration table plays an important role in the measurement of inertial instrument and is an indispensable part of the development of inertial technology.In order to solve the control problem of precision wire vibration table under high dynamic,high acceleration and large load,it is necessary to design a targeted control algorithm to meet the requirements.In this paper,the performance index of linear vibration table is introduced firstly,and then the principle analysis and mathematical modeling of permanent magnet synchronous linear motor used in linear vibration table are carried out.In order to ensure the stable operation of the system,PID controllers are designed for the current loop,speed loop and position loop of the motor respectively.In order to improve the tracking accuracy of the system,a feedforward controller is introduced.Through the simulation results,it can be found that the traditional PID+ feedforward control cannot meet the requirements of tracking performance of the designed linear vibration table.Then,in order to meet the performance requirements of the system,the zero phase error tracking control method is proposed,and the working principle of the control method and the disadvantages of the insufficient disturbance resistance ability are analyzed.The disturbance observer is introduced to suppress the disturbance and improve the tracking accuracy of the system.The simulation results show that the proposed control method can effectively track sinusoidal signals and meet the performance requirements.Finally,to ensure that the control method can play a role in engineering applications,the existing experimental equipment debugging and algorithm implementation.In order to obtain the open-loop transfer function of the system,the parameters of the system are identified by using frequency domain characteristics.Then the control method proposed in this paper is converted into program language and added to the control system.The effectiveness of the proposed algorithm is verified by existing experimental equipment.According to the final debugging results and data analysis,the improved zero-phase error tracking control improves the tracking effect of the sinusoidal signal and improves the servo performance of the system.