外观
论文arXiv 2607.218673 个月前
何时学习型命令适配器值得使用？冻结式运动策略的闭环识别与反事实审计
原文链接：When Is a Learned Command Adapter Worth It? Closed-Loop Identification and Counterfactual Auditing of Frozen Locomotion Policies（arXiv 2607.21867 · 发布日期：2026-07-23）
When Is a Learned Command Adapter Worth It? Closed-Loop Identification and Counterfactual Auditing of Frozen Locomotion Policies
提出适配器必要性审计，用闭环识别和反事实指标评估冻结运动策略，并在Go2多类查询上验证。
核心要点
- 动机是判断部署观测中真实且可恢复的改进，是否足以支持学习适配器。
- 方法分解多类增益与约束违例，并由源簇学习器重拟合给出三类决策。
- 在Go2审计中，直接查询为NO-GO，VGCC和MPC查询为ABSTAIN，合成控制为GO。
- 归档诊断显示有同状态空间，但恢复的分配增益很小，提示不应预设适配器有价值。
验证范围与局限：验证范围为Go2上的多种干预和三类查询分布，摘要未说明仿真或真机。
英文摘要 (Abstract)
Adding a learned adapter to a frozen, command-conditioned locomotion policy is worthwhile only if the interface exposes improvements that are both real and recoverable from deployment-time observations. We introduce an adapter necessity audit that separates global operating-point gain,same-state counterfactual headroom, deployment gain over a cross-fitted fixed action, and state-allocation gain over a frequency-matched randomized policy. Source-cluster learner refits map these quantities and constraint violations to a GO/NO-GO/ABSTAIN decision. Closed-loop command- response identification provides optional decision features. On Go2, an archived scale-prefix diagnostic finds 5.2% same-state headroom but only 0.55% recovered allocation gain. Our confirmatory audit evaluates direct, scale, heading, and yaw interventions on twenty independent clusters for each of three query distributions induced by direct control, VGCC, and MPC, using 200 full learner refits. At 1% deployment and allocation thresholds and a 5% violation tolerance, direct queries return NO-GO, while VGCC and MPC queries ABSTAIN. VGCC has the largest mean deployment gain (1.34%), but its allocation lower bound is 0.09% and its violation upper bound is 6.25%. A deployment-representative twenty-cluster H1 audit also returns NO-GO, whereas a learner-level synthetic control returns GO. The audit therefore tests whether observable signal justifies state-dependent adaptation rather than presuming that an adapter is valuable.
作者：Zongtan Li
来源
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