Research on Angular Vibration Hydraulic Table Adopting Iteration-learning-control
Jin Meng · Journal of Astronautics · 2010
Angular vibration hydraulic table is a kind of complex and non-linear system. Applying traditional controller to the angular vibration system,it is difficult to increase the control accuracy to a high level. This paper applied a kind of non-linear control strategy which is iteration-learning-control to control angular vibration hydraulic table. Aiming at the stabilization of the control system and the convergence of the iteration-learning-control,a compound iteration-learning-control is adopted,and the convergence criterion is given from the view of frequency-domain. Comparison simulation with experiment,the results show that the inner frame of the angular vibration hydraulic table has the response capability of 20 Hz(0.4°peak to peak value),the lag of phase is no more than 10°and the error of value is less than ±10% under the pressure of 12 MPa. The results verify the effectiveness of the compound iteration-learning-control strategy,which can increase the bandwidth of the system and improve the precision of the system during tracking the expected input signal. The compound iterative-learning control also provides a new way in high performance real-time control of angle vibration hydraulic table.