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针对一类离散时间非线性系统,提出一种基于虚拟参考反馈整定的改进无模型自适应控制方案.首先,利用动态线性化方法给出非线性系统的紧格式动态线性化模型;然后,基于优化技术设计控制算法和伪偏导数估计算法;最后,设计基于虚拟参考反馈整定的伪偏导数初值和重置值的估计算法.该控制方案设计仅依赖于被控系统的输入和输出数据,且能保证闭环系统的稳定性和收敛性.仿真比较结果验证了所提出方法的有效性.
Aiming at a class of discrete-time nonlinear systems, an improved model-free adaptive control scheme based on virtual reference feedback tuning is proposed. First, the dynamic linearization method is used to give a compact dynamic linearization model of nonlinear systems. Then, Technical design control algorithm and pseudo-partial derivative estimation algorithm.Finally, an estimation algorithm of pseudo-partial derivative initial value and reset value based on virtual reference feedback is designed.The design of the control scheme depends only on the input and output data of the controlled system, and Can guarantee the stability and convergence of the closed-loop system.The simulation results verify the effectiveness of the proposed method.