CONSCIENCE: Control and System Identification using Elements of Neural Network Computation Engineering

This paper focuses on the nonlinear aeroelastic system identification method based on an artificial neural network (ANN) that uses time-delay and feedback elements. A typical two-dimensional wing section with control surface is modelled to illustrate the proposed identification algorithm. The response of the system, which applies a sine-chirp input signal on the control surface, is computed by time-marching-integration. A time-delay recurrent neural network (TDRNN) is employed and trained to predict the pitch angle of the system. The chirp and sine excitation signals are used to verify the identified system. Estimation results of the trained neural network are compared with numerical simulation values. Two types of structural nonlinearity are studied, cubic-spring and friction. The results indicate that the TDRNN can approach the nonlinear aeroelastic system exactly.

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Long Short-term Memory Neural Network-based System Identification and Augmented Predictive Control of Piezoelectric Actuators for Precise Trajectory Tracking

IFAC-PapersOnLine ◽

10.1016/j.ifacol.2021.11.150 ◽

2021 ◽

Vol 54 (20) ◽

pp. 38-45

Author(s):

Mayur S. Patil ◽

Bharat Charuku ◽

Juan Ren

Keyword(s):

Neural Network ◽

System Identification ◽

Predictive Control ◽

Trajectory Tracking ◽

Short Term Memory ◽

Piezoelectric Actuators ◽

Short Term ◽

Term Memory ◽

Long Short Term Memory

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A Nonlinear System Identification Method Based on Adaptive Neural Network

Journal of Computing and Information Technology ◽

10.20532/cit.2020.1005179 ◽

2021 ◽

Vol 28 (2) ◽

pp. 111-123

Keyword(s):

Neural Network ◽

System Identification ◽

Nonlinear System ◽

Nonlinear System Identification ◽

Generic Model ◽

Control Engineering ◽

The Neural Network ◽

Adaptive Pso ◽

And Control ◽

Scientific Engineering

Nonlinear system identification (NSI) is of great significance to modern scientific engineering and control engineering. Despite their identification ability, the existing analysis methods for nonlinear systems have several limitations. The neural network (NN) can overcome some of these limitations in NSI, but fail to achieve desirable accuracy or training speed. This paper puts forward an NSI method based on adaptive NN, with the aim to further improve the convergence speed and accuracy of NN-based NSI. Specifically, a generic model-based nonlinear system identifier was constructed, which integrates the error feedback and correction of predictive control with the generic model theory. Next, the radial basis function (RBF) NN was optimized by adaptive particle swarm optimization (PSO), and used to build an NSI model. The effectiveness and speed of our model were verified through experiments. The research results provide a reference for applying the adaptive PSO-optimized RBFNN in other fields.

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