This repo contains a gym environment representing a chaotic warehouse, a DQN Agent provided by the library stable-baselines (https://stable-baselines.readthedocs.io) and a simplified implementation of the Intrinsic Curiosity Module (https://pathak22.github.io/noreward-rl/).

This work was a collaboration between TUM students (Anja Kirschner, Leo Tappe and Victor Caceres) from different disciplines and myself, under the guidance of the company MaibornWolff GmbH.

For a detailed explanation of the project and its implementation, please visit https://www.di-lab.tum.de/en/past-projects/maibornwolff-multi-agent-reinforcement-learning-for-logistics/.

State:

-Agent Position
-Agent Status
-StagingIn (place where the incoming item are)
-StagingOut (place where the outcoming items are) -BinStatus (places where the items are located inside the warehouse) -Timestep

This implementation uses a Box Space (Continuous Space) instead of a Multidiscrete space, but applies a one-hot encoding to all the variables except the Timestep.

Actions: LEFT,RIGHT,UP,DOWN + Agent_slots x bin_slots

Particularities
-No Stay Command
-Sparse Rewards with only 'completion of an OUTBOUND transaction'
-Random Transactions (either outbound or inbound sensible transactions are generated when a transaction is completed)
-Timestep as part of the state
-The staging-out-area.status details what items are MISSING to complete the transaction

To run the code, create a virtual environment using Anaconda and Python 3.7

1. Clone the repo

git clone https://github.com/andresbecker/RL_for_logistics.git
cd RL_for_logistics

2. Create a new virtual environment

conda create --name conda_rl python=3.7
conda activate conda_rl

3. Install the dependencies

pip install --upgrade pip wheel
pip install -r requirements.txt

4. Install the environment in development mode

pip install -e .

Train a DQN on a warehouse just by typing

python Train_model.py

Your model will be saved to the models directory.

You can generate documentation for the entire project by running make html in the docs directory. You should now be able to find a file called index.html in docs/build/html. Open it with your favorite browser to browse the documentation.

Note: you need to have make installed for this.