载荷时变的双层隔振系统自适应滑模控制

发布时间：2018-05-09 02:22

本文选题：主动控制 + 双层隔振系统　；参考：《振动工程学报》2017年04期

【摘要】：针对实际应用双层隔振系统载荷时变的特性,设计了基于正交函数近似法的自适应滑模控制器的振动控制策略。首先,将系统的参考坐标置于名义载荷下的静态位移处,同时考虑到弹簧刚度的非线性特性,建立系统的非线性模型。其次,将系统的不确定部分用两个未知时变函数来描述,应用一系列加权正交函数的和来近似未知函数,基于滑模控制理论设计自适应滑模控制律,结合Lyapunov直接法推导正交函数序列系数的自适应更新律,同时可以保证系统的稳定性。与传统PID控制的对比仿真与实验结果表明,提出的自适应滑模控制策略能够更好地克服载荷时变的影响,提高了系统的控制性能。
[Abstract]:Aiming at the time-varying load characteristics of double-layer vibration isolation system, a vibration control strategy of adaptive sliding mode controller based on orthogonal function approximation method is designed. Firstly, the reference coordinates of the system are placed at the static displacement under nominal load, and the nonlinear model of the system is established taking into account the nonlinear characteristics of the spring stiffness. Secondly, the uncertain part of the system is described by two unknown time-varying functions. A series of weighted orthogonal functions are used to approximate the unknown functions, and the adaptive sliding mode control law is designed based on the sliding mode control theory. The adaptive updating law of orthogonal function sequence coefficients can be derived by Lyapunov direct method, and the stability of the system can be guaranteed at the same time. Compared with the traditional PID control, the simulation and experimental results show that the proposed adaptive sliding mode control strategy can better overcome the influence of time-varying load and improve the control performance of the system.
【作者单位】：南阳师范学院机电工程学院;石油装备与智能化控制河南省工程实验室;重庆大学自动化学院;
【基金】：国家自然科学基金河南联合基金项目(U1404614) 河南省科技攻关项目(142300410455) 河南省教育厅科学技术研究重点项目(17A413002,14B120003)
【分类号】：O328

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