PhysicalAgent：迈向通用认知机器人的基础世界模型框架

Core Viewpoint - The article discusses the development of PhysicalAgent, a robotic control framework designed to overcome key limitations in the current robot manipulation field, specifically addressing the robustness and generalizability of visual-language-action (VLM) models and world model-based methods [2][3]. Group 1: Key Bottlenecks and Solutions - Current VLM models require task-specific fine-tuning, leading to a significant drop in robustness when switching robots or environments [2]. - World model-based methods depend on specially trained predictive models, limiting their generalizability due to the need for carefully curated training data [2]. - PhysicalAgent aims to integrate iterative reasoning, diffusion video generation, and closed-loop execution to achieve cross-modal and cross-task general manipulation capabilities [2]. Group 2: Framework Design Principles - The framework's design allows perception and reasoning modules to remain independent of specific robot forms, requiring only lightweight skeletal detection models for different robots [3]. - Video generation models have inherent advantages due to pre-training on vast multimodal datasets, enabling quick integration without local training [5]. - The framework aligns with human-like reasoning, generating visual representations of actions based solely on textual instructions [5]. - The architecture demonstrates cross-modal adaptability by generating different manipulation tasks for various robot forms without retraining [5]. Group 3: VLM as the Cognitive Core - VLM serves as the cognitive core of the framework, facilitating a multi-step process of instruction, environment interaction, and execution [6]. - The innovative approach redefines action generation as conditional video synthesis rather than direct control strategy learning [6]. - The robot adaptation layer is the only part requiring specific robot tuning, converting generated action videos into motor commands [6]. Group 4: Experimental Validation - Two types of experiments were conducted to validate the framework's cross-modal generalization and iterative execution robustness [8]. - The first experiment focused on verifying the framework's performance against task-specific baselines and its ability to generalize across different robot forms [9]. - The second experiment assessed the iterative execution capabilities of physical robots, demonstrating the effectiveness of the "Perceive→Plan→Reason→Act" pipeline [12]. Group 5: Key Results - The framework achieved an 80% final success rate across various tasks for both the bimanual UR3 and humanoid G1 robots [13][16]. - The first-attempt success rates were 30% for UR3 and 20% for G1, with average iterations required for success being 2.25 and 2.75, respectively [16]. - The iterative correction process significantly improved task completion rates, with a sharp decline in the proportion of unfinished tasks after the first few iterations [16].