feat(pid_longitudinal_controller): add new slope compensation mode trajectory_goal_adaptive (#9705)

Signed-off-by: yuki-takagi-66 <yuki.takagi@tier4.jp>

Author: yuki-takagi-66

control/autoware_pid_longitudinal_controller/README.md

@@ -68,6 +68,8 @@ There are two sources of the slope information, which can be switched by a param
   - Cons: z-coordinates of high-precision map is needed.
   - Cons: Does not support free space planning (for now)
 
+We also offer the options to switch between these, depending on driving conditions.
+
 **Notation:** This function works correctly only in a vehicle system that does not have acceleration feedback in the low-level control system.
 
 This compensation adds gravity correction to the target acceleration, resulting in an output value that is no longer equal to the target acceleration that the autonomous driving system desires. Therefore, it conflicts with the role of the acceleration feedback in the low-level controller.

control/autoware_pid_longitudinal_controller/config/autoware_pid_longitudinal_controller.param.yaml

@@ -74,7 +74,7 @@
 
     # slope compensation
     lpf_pitch_gain: 0.95
-    slope_source: "raw_pitch" # raw_pitch, trajectory_pitch or trajectory_adaptive
+    slope_source: "trajectory_goal_adaptive" # raw_pitch, trajectory_pitch, trajectory_adaptive or trajectory_goal_adaptive
     adaptive_trajectory_velocity_th: 1.0
     max_pitch_rad: 0.1
     min_pitch_rad: -0.1

control/autoware_pid_longitudinal_controller/include/autoware/pid_longitudinal_controller/pid_longitudinal_controller.hpp

@@ -204,7 +204,12 @@ class PidLongitudinalController : public trajectory_follower::LongitudinalContro
   double m_max_acc_cmd_diff;
 
   // slope compensation
-  enum class SlopeSource { RAW_PITCH = 0, TRAJECTORY_PITCH, TRAJECTORY_ADAPTIVE };
+  enum class SlopeSource {
+    RAW_PITCH = 0,
+    TRAJECTORY_PITCH,
+    TRAJECTORY_ADAPTIVE,
+    TRAJECTORY_GOAL_ADAPTIVE
+  };
   SlopeSource m_slope_source{SlopeSource::RAW_PITCH};
   double m_adaptive_trajectory_velocity_th;
   std::shared_ptr<LowpassFilter1d> m_lpf_pitch{nullptr};

control/autoware_pid_longitudinal_controller/src/pid_longitudinal_controller.cpp

@@ -196,6 +196,8 @@ PidLongitudinalController::PidLongitudinalController(
     m_slope_source = SlopeSource::TRAJECTORY_PITCH;
   } else if (slope_source == "trajectory_adaptive") {
     m_slope_source = SlopeSource::TRAJECTORY_ADAPTIVE;
+  } else if (slope_source == "trajectory_goal_adaptive") {
+    m_slope_source = SlopeSource::TRAJECTORY_GOAL_ADAPTIVE;
   } else {
     RCLCPP_ERROR(logger_, "Slope source is not valid. Using raw_pitch option as default");
     m_slope_source = SlopeSource::RAW_PITCH;
@@ -529,35 +531,44 @@ PidLongitudinalController::ControlData PidLongitudinalController::getControlData
   // NOTE: getPitchByTraj() calculates the pitch angle as defined in
   // ../media/slope_definition.drawio.svg while getPitchByPose() is not, so `raw_pitch` is reversed
   const double raw_pitch = (-1.0) * longitudinal_utils::getPitchByPose(current_pose.orientation);
+  m_lpf_pitch->filter(raw_pitch);
   const double traj_pitch = longitudinal_utils::getPitchByTraj(
     control_data.interpolated_traj, control_data.target_idx, m_wheel_base);
 
   if (m_slope_source == SlopeSource::RAW_PITCH) {
-    control_data.slope_angle = m_lpf_pitch->filter(raw_pitch);
+    control_data.slope_angle = m_lpf_pitch->getValue();
   } else if (m_slope_source == SlopeSource::TRAJECTORY_PITCH) {
     control_data.slope_angle = traj_pitch;
-  } else if (m_slope_source == SlopeSource::TRAJECTORY_ADAPTIVE) {
+  } else if (
+    m_slope_source == SlopeSource::TRAJECTORY_ADAPTIVE ||
+    m_slope_source == SlopeSource::TRAJECTORY_GOAL_ADAPTIVE) {
     // if velocity is high, use target idx for slope, otherwise, use raw_pitch
-    if (control_data.current_motion.vel > m_adaptive_trajectory_velocity_th) {
-      control_data.slope_angle = traj_pitch;
-      m_lpf_pitch->filter(raw_pitch);
-    } else {
-      control_data.slope_angle = m_lpf_pitch->filter(raw_pitch);
-    }
+    const bool is_vel_slow = control_data.current_motion.vel < m_adaptive_trajectory_velocity_th &&
+                             m_slope_source == SlopeSource::TRAJECTORY_ADAPTIVE;
+
+    const double goal_dist = autoware::motion_utils::calcSignedArcLength(
+      control_data.interpolated_traj.points, current_pose.position,
+      control_data.interpolated_traj.points.size() - 1);
+    const bool is_close_to_trajectory_end =
+      goal_dist < m_wheel_base && m_slope_source == SlopeSource::TRAJECTORY_GOAL_ADAPTIVE;
+
+    control_data.slope_angle =
+      (is_close_to_trajectory_end || is_vel_slow) ? m_lpf_pitch->getValue() : traj_pitch;
+
     if (m_previous_slope_angle.has_value()) {
       constexpr double gravity_const = 9.8;
       control_data.slope_angle = std::clamp(
         control_data.slope_angle,
         m_previous_slope_angle.value() + m_min_jerk * control_data.dt / gravity_const,
         m_previous_slope_angle.value() + m_max_jerk * control_data.dt / gravity_const);
     }
+    m_previous_slope_angle = control_data.slope_angle;
   } else {
     RCLCPP_ERROR_THROTTLE(
       logger_, *clock_, 3000, "Slope source is not valid. Using raw_pitch option as default");
-    control_data.slope_angle = m_lpf_pitch->filter(raw_pitch);
+    control_data.slope_angle = m_lpf_pitch->getValue();
   }
 
-  m_previous_slope_angle = control_data.slope_angle;
   updatePitchDebugValues(control_data.slope_angle, traj_pitch, raw_pitch, m_lpf_pitch->getValue());
 
   return control_data;