diff --git a/control/yolo_human_tracking.py b/control/yolo_human_tracking.py
index c9f199d..151991c 100644
--- a/control/yolo_human_tracking.py
+++ b/control/yolo_human_tracking.py
@@ -14,15 +14,15 @@ def darknet_callback(data):
     for target in data.bounding_boxes:
         if(target.id==0):
             print('find human')
-            z = height / math.cos(theta)
+            z = height / math.sin(theta)
             u = (target.xmax+target.xmin)/2
             v = (target.ymax+target.ymin)/2
             u_ = u-u_center
             v_ = v-v_center
             u_velocity = -Kp_xy*u_
             v_velocity = -Kp_xy*v_
-            x_velocity = v_velocity*z/math.sin(theta)/(-v_*math.sin(theta)+fy*math.cos(theta))
-            y_velocity = (u_*math.sin(theta)*x_velocity+z/math.sin(theta)*u_velocity)/fx
+            x_velocity = v_velocity*z/(v_*math.cos(theta)+fy*math.sin(theta))
+            y_velocity = (z*u_velocity-u_*math.cos(theta)*x_velocity)/fx
             twist.linear.x = x_velocity
             twist.linear.y = y_velocity
             twist.linear.z = Kp_z*(target_height-height)
@@ -51,7 +51,7 @@ if __name__ == "__main__":
     get_time = False
     twist = Twist()
     cmd = String()
-    theta = -math.pi/4
+    theta = 0
     u_center=640/2 
     v_center=360/2
     fx = 205.46963709898583
diff --git a/robocup/uav_fall_detect.py b/robocup/uav_fall_detect.py
deleted file mode 100644
index 4ecf013..0000000
--- a/robocup/uav_fall_detect.py
+++ /dev/null
@@ -1,17 +0,0 @@
-import rospy
-from mavros_msgs.msg import State
-import sys
-
-def state_callback(msg):
-    print(msg.armed)
-
-if __name__ == "__main__":
-    rospy.init_node('uav_fall_detect')
-    vehicle_type = sys.argv[1]
-    vehicle_id = sys.argv[2]
-    state_sub = rospy.Subscriber('/'+vehicle_type+'_'+vehicle_id+'/mavros/state', State, state_callback)
-    rate = rospy.Rate(10)
-    while not rospy.is_shutdown():
-        rate.sleep()
-
-
diff --git a/sensing/gimbal/gimbal_control.py b/sensing/gimbal/gimbal_control.py
index cc5bbdd..e02eda3 100644
--- a/sensing/gimbal/gimbal_control.py
+++ b/sensing/gimbal/gimbal_control.py
@@ -13,7 +13,7 @@ if __name__ == "__main__":
     mountCnt = rospy.Publisher(vehicle_type+'_'+vehicle_id+'/mavros/mount_control/command', MountControl, queue_size=10)
     mountConfig = rospy.ServiceProxy(vehicle_type+'_'+vehicle_id+'/mavros/mount_control/configure', MountConfigure)
     rate=rospy.Rate(100)
-    gimbal_pitch_ = -45
+    gimbal_pitch_ = -60
     gimbal_yaw_ = 0.0
     gimbal_roll_ = 0.0
     srvheader=std_msgs.msg.Header()