# Modular Deep Recurrent Neural Network: Application to Quadrotors

arXiv: https://arxiv.org/abs/2609.04339 · HTML: https://mlsanity.com/paper/2609.04339/

## Key facts

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- First posted on arXiv 3 Sep 2026.

## Abstract (arXiv)

A modular deep Recurrent Neural Network (RNN) is introduced to facilitate the process of deploying various architectures of RNNs, and to automatically compute derivatives for gradient-based learning methods. The modularity leads to a set of new architectures, one of which includes feedforward inter-layer connections. By adding feedforward inter-layer connections in a multi-layer RNN, it is observed that the capability of the RNN to learn and model high-order dynamics and nonlinearities is significantly improved. The problem of vanishing/exploding gradient in space for a multilayer RNN is also alleviated using feedforward connections. These results are demonstrated using a quadrotor case study, for which a model of the altitude dynamics is learned with our particular network structure, while existing methods are unable to generalize as quickly or at all.