Discrete-Time Neural Network Approach For Tracking Control Of Spherical Inverted Pendulum
IEEE Transactions on Systems, Man, and Cybernetics(2020)
摘要
In recent years, the tracking problem of spherical inverted pendulum (SIP) system with multi-input, multi-output nature and unstable zero dynamics has been well addressed based on continuous-time nonlinear output regulation (NOR) theory. For the convenience of digital implementation, this paper further investigates the approximate NOR problem of the SIP system in discrete-time framework. The key for solving the discrete-time NOR problem lies in how to solve a set of algebraic functional equations known as discrete regulator equations (DRE). Since the equations are very complicated, the accurate solution of the DRE can not be obtained. In this paper, we first show that the DRE associated with the SIP system are solvable by center manifold theorem and then use neural network approach to tackle with the tracking problem. Finally, we compare our method with polynomial approximation method.
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关键词
Mathematical model,Approximation methods,Nonlinear systems,Artificial neural networks,State feedback,Discrete-time nonlinear system,neural network,output regulation,spherical inverted pendulum (SIP)
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