diff --git a/fi/train.go b/fi/train.go
index 6081487..6de6dee 100644
--- a/fi/train.go
+++ b/fi/train.go
@@ -99,6 +99,10 @@ type TrainHeadPositionInfo struct {
 	Speed float32
 	//加速度(m/s^2)
 	Acceleration float32
+	//列车上一次所在轨道link
+	OldLink string
+	//列车上一次车头位置信息
+	OldLinkOffset int64
 }
 
 func (t *TrainHeadPositionInfo) String() string {
diff --git a/init.go b/init.go
index bd96eb8..7ca4ca2 100644
--- a/init.go
+++ b/init.go
@@ -10,7 +10,7 @@ import (
 
 const (
 	// 仿真循环间隔，单位ms
-	RtssSimulationTick = 20
+	RtssSimulationTick = 10
 )
 
 // 初始化仿真