An increasing trend in the use of neural networks in control systems is being observed. The aim of this paper is to reveal that the straightforward application of learning neural network feedforward controllers with closed-loop data may introduce parameter inconsistency that degrades control performance, and to provide a solution. The proposed method employs instrumental variables to ensure consistent parameter estimates. A nonlinear system example reveals that the developed instrumental variable neural network (IVNN) approach asymptotically recovers the optimal solution, while pre-existing approaches are shown to lead to inconsistent estimates.
|Publication status||Published - 2022|
|Event||14th IFAC Workshop on Adaptive and Learning Control Systems, ALCOS 2022 - Casablanca, Morocco|
Duration: 29 Jun 2022 → 1 Jul 2022
- Feedforward control
- instrumental variables
- neural networks