Sliding mode control research of electrohydraulic system for artillery
CHAI Huawei1, JIA Zhi1, XUE Yaping1, ZHANG Yunhu1, LI Zhigang2
(1.School of Mechanical Engineering, Jiangsu University of Technology, Changzhou 213001, China;
2.School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China)
Abstract: Aiming at different launching angles and cartridge loading, rotating inertia of oriental machine and supporting bracket is constantly varied. In addition, impacting moment is also changed, hence its electrohydraulic system was defined as a typical nonlinear system. Thus, a sliding mode controller(SMC) was introduced to electrohydraulic servo control. Firstly, control principle was interpreted to gain its state equations. Secondly, SMC was desingned to overcome effects of model uncertainties and disturbance to enhance antidisturbance ability. In the end, simulation was carried out. Simulation results show that, compared with conventional PID controller, dynamic error is reduced and robustness is enhanced by this SMC, fulfilling system requests.
Key words: artillery; electrohydraulic servo; sliding mode controller(SMC)