fix(control_launch): change default mpc param to improve performance (#667)

Signed-off-by: Takamasa Horibe <horibe.takamasa@gmail.com>

Author: TakaHoribe

launch/tier4_control_launch/config/trajectory_follower/lateral_controller.param.yaml

@@ -44,8 +44,8 @@
     # -- vehicle model --
     vehicle_model_type: "kinematics" # vehicle model type for mpc prediction. option is kinematics, kinematics_no_delay, and dynamics
     input_delay: 0.24                # steering input delay time for delay compensation
-    vehicle_model_steer_tau: 0.1     # steering dynamics time constant (1d approximation) [s]
-    steer_lim_deg: 20.0              # steering angle limit [deg]
+    vehicle_model_steer_tau: 0.3     # steering dynamics time constant (1d approximation) [s]
+    steer_lim_deg: 40.0              # steering angle limit [deg]
     steer_rate_lim_dps: 600.0        # steering angle rate limit [deg/s]
     acceleration_limit: 2.0          # acceleration limit for trajectory velocity modification [m/ss]
     velocity_time_constant: 0.3      # velocity dynamics time constant  for trajectory velocity modification [s]