用逆向动作验证计划逻辑,让大模型自动发现并修正任务规划错误。
Self-Corrective Task Planning by Inverse Prompting with Large Language Models
- 通过生成逆向动作检验原计划是否可逆,实现自我纠错。
- 在基准数据集上成功率比现有方法平均提升16.3%。
- 适合需要高可靠性任务规划的机器人应用,解释性更强。
在机器人任务规划中,大语言模型(LLMs)展现出生成复杂长时序动作序列的潜力。然而,这些模型常产生看似合理但不准确的响应。现有方法多依赖预定义错误集或外部知识源,需人工与计算资源投入。近期自校正方法兴起,使模型能自主生成并优化计划,识别错误。但其校正能力受限于推理不足。本文提出InversePrompt,一种基于逆向提示的新型自校正任务规划方法,通过引入推理步骤增强可解释性。该方法生成初始动作对应的逆向动作,并验证逆向动作能否使系统恢复至原始状态,从而显式检验计划的逻辑一致性。在基准数据集上的实验表明,该方法平均成功率比现有基于LLM的任务规划方法高出16.3%。本方法在真实环境中提供更清晰的反馈依据,相比现有自校正方法,在多种场景下均实现更高任务完成率。
原文摘要 · Abstract (English)
In robot task planning, large language models (LLMs) have shown significant promise in generating complex and long-horizon action sequences. However, it is observed that LLMs often produce responses that sound plausible but are not accurate. To address these problems, existing methods typically employ predefined error sets or external knowledge sources, requiring human efforts and computation resources. Recently, self-correction approaches have emerged, where LLM generates and refines plans, identifying errors by itself. Despite their effectiveness, they are more prone to failures in correction due to insufficient reasoning. In this paper, we introduce InversePrompt, a novel self-corrective task planning approach that leverages inverse prompting to enhance interpretability. Our method incorporates reasoning steps to provide clear, interpretable feedback. It generates inverse actions corresponding to the initially generated actions and verifies whether these inverse actions can restore the system to its original state, explicitly validating the logical coherence of the generated plans. The results on benchmark datasets show an average 16.3% higher success rate over existing LLM-based task planning methods. Our approach offers clearer justifications for feedback in real-world environments, resulting in more successful task completion than existing self-correction approaches across various scenarios.
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