distance-aware-mobile-vla

Distance-Aware Mobile VLA Model

Overview

This is a distance-aware Vision-Language-Action (VLA) model for mobile robot navigation, built on top of Kosmos2 vision backbone.

Model Architecture

• Backbone: Kosmos2 Vision Model (microsoft/kosmos-2-patch14-224)
• Action Head: LSTM + MLP
• Distance Awareness: Distance embedding and fusion layers
• Input: 8-frame image sequence
• Output: 2-frame action prediction [linear_x, linear_y, angular_z]

Performance

• Overall MAE: 0.2602
• Success Rate: 88.7%
• Distance-wise Performance:
  • Close: MAE 0.2617 (76.6% success)
  • Medium: MAE 0.2017 (81.9% success) ⭐ Best
  • Far: MAE 0.3373 (69.8% success)

Usage

from transformers import AutoProcessor, AutoModel
import torch

# Load model
processor = AutoProcessor.from_pretrained("your-username/distance-aware-mobile-vla")
model = AutoModel.from_pretrained("your-username/distance-aware-mobile-vla")

# Prepare input
images = torch.randn(1, 8, 3, 224, 224)  # 8-frame sequence
distance_labels = torch.tensor([1])  # 0: close, 1: medium, 2: far

# Predict actions
with torch.no_grad():
    predicted_actions = model(images, distance_labels)

Training Details

• Dataset: 480 episodes (160 per distance)
• Augmentation: Distance-aware specialized augmentation
• Distance Factors: Close 8x, Medium 5x, Far 8x
• Training Epochs: 15

Key Features

• ✅ Distance-aware training and inference
• ✅ Kosmos2 vision backbone
• ✅ Temporal modeling with LSTM
• ✅ Specialized data augmentation
• ✅ Balanced performance across distances

Limitations

• Currently predicts 2 frames from 8 input frames
• SPACE (stop) action accuracy needs improvement
• Far distance performance can be enhanced

Citation

If you use this model, please cite:

@misc{distance_aware_mobile_vla_2024,
  title={Distance-Aware Mobile VLA Model},
  author={Your Name},
  year={2024}
}