Visual stabilization with sliding mode control outperforms PID only under actuator saturation

A paper submitted by Sooyeun Yang and other authors points out that the advantage of boundary-layer sliding mode control (SMC) over causal baselines such as LPF and PID in visual stabilization has a clear activation condition: it holds only when the disturbance speed approaches or exceeds the actuator's rotational speed limit and the per-step actuation budget is constrained (i.e., plant binding). This condition was reached by sweeping simulated rotational speed limits; both collected datasets themselves fall outside this condition. Under plant binding, translation error is on par with the baselines, and SMC outperforms PID in the worst-case angular condition, with Cohen's d up to +0.83. The authors state that the PTZ device's default 100 degrees/second happens to sit right at the crossover point, which explains the earlier result in which PID held a slight lead in the angular setting. Ablation experiments also show that increasing the SMC reaching gain k degrades average tracking performance outside a narrow window.

AI 根据报道生成 · 6 days ago更新