Safe Deep Reinforcement Learning for Multi-Agent Systems with Continuous Action Spaces

This repository contains the source code and the implementation details for the paper titled Safe Deep Reinforcement Learning for Multi-Agent Systems with Continuous Action Spaces accepted at RL4RealLife @ICML2021

Description

The objective of this approach is to develop a safe variation of the Multiagent Deep Deterministic Policy Gradient (MADDPG). More specifically, the goal is to modify the potentially unsafe MADDPG-based agents' action via projecting it on a safe subspace space using a QP Solver. More details can be found in [1]. This project relies heavily on the OpenAI’s Multi-Agent Particle Environments [2], which is the simulator used to train and evaluate the agents.

Installation

To install and execute the project's source code follow the steps described in the following snippet: WARNING: Installs packages

git clone git@github.com:zisikons/deep-rl.git
cd ./deep-rl
sh install_requirements.sh  # installs all the requirements

Alternatively if you don't want to install the new packages on your computer, then make sure to at least:

• Download the code from the forked multiagent-particle-envs

git submodule update --init --recursive

• Download the following python packages:

gym==0.10.5
pyglet==1.3.2
qpsolvers

Execution

Once the code is downloaded and everything is set, in order to train an agent you need to do the following:

python3 scripts/collect_data.py                  # Uses the simulator to generate the datasets for the
                                                 # constraint sensitivity Neural Networks
                                    
python3 scripts/train_constraint_networks.py     # Trains the constraint sensitivity Neural Networks
                                                 # (not required for the vanilla MADDPG agent) 

python3 scripts/train_<agent_type>.py            # Trains one of the 3 RL agents that were developed
                                       
python3 scripts/test_<agent_type>.py             # Tests one of the 3 RL agents that were developed            

Note: The above sequence takes a considerable amount of time.

Approach Summary

References

[1] Gal Dalal, Krishnamurthy Dvijotham, Matej Vecerik, Todd Hester, Cosmin Paduraru, Yuval Tassa (2018). Safe Exploration in Continuous Action Spaces

[2] Ryan Lowe, Yi Wu, Aviv Tamar, Jean Harb, Pieter Abbeel, Igor Mordatch (2017). Multi-Agent Actor-Critic for Mixed Cooperative-Competitive Environments

Contributors

• Athina Nisioti (@anisioti)
• Dimitris Gkouletsos (@dgkoul)
• Konstantinos Zisis (@zisikons)
• Ziyad Sheebaelhamd (@ziyadsheeba)