diff --git a/utilities/at32f421_freertos_demo/src/TaskLoop.c b/utilities/at32f421_freertos_demo/src/TaskLoop.c
index 7a977e5..2cb90a0 100644
--- a/utilities/at32f421_freertos_demo/src/TaskLoop.c
+++ b/utilities/at32f421_freertos_demo/src/TaskLoop.c
@@ -673,12 +673,16 @@ void vd1_task(void)
 
     /*--- 2. 稳定期：只跟踪基线，不检测车辆 ---*/
     if (!g_loop_stable) {
+        /* 稳定期内不做斜率限幅和 IIR — 直接用 Value 快速收敛到真实基线 */
+        loop1_CAPVD = loop1_Value;
+        loop1_CAPVD_fast = loop1_Value;
+
         update_moving_average(&loop1_ORG_SUM, &loop1_ORG_CNT,
                               &loop1_Origin, loop1_CAPVD, 100);
         _stable_cnt++;
         if (_stable_cnt >= STABLE_SAMPLES) {
             g_loop_stable = 1;
-            PRINT("Loop stable, Origin:%d\n", loop1_Origin);
+            PRINT("Loop stable, Origin:%d\\n", loop1_Origin);
         }
         return;
     }