firestar5683
291 lines
12 KiB
Python
291 lines
12 KiB
Python
from cereal import car
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import numpy as np
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from openpilot.common.realtime import DT_CTRL
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from openpilot.selfdrive.controls.lib.drive_helpers import CONTROL_N
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from openpilot.common.pid import PIDController
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from openpilot.selfdrive.modeld.constants import ModelConstants
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from openpilot.common.filter_simple import FirstOrderFilter
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from opendbc.car.gm.values import CarControllerParams, GMFlags
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CONTROL_N_T_IDX = ModelConstants.T_IDXS[:CONTROL_N]
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clip = np.clip
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interp = np.interp
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LongCtrlState = car.CarControl.Actuators.LongControlState
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def apply_deadzone(error, deadzone):
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if error > deadzone:
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error -= deadzone
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elif error < -deadzone:
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error += deadzone
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else:
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error = 0.0
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return error
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def long_control_state_trans(CP, active, long_control_state, v_ego,
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should_stop, brake_pressed, cruise_standstill, starpilot_toggles):
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# Ignore cruise standstill if car has a gas interceptor
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cruise_standstill = cruise_standstill and not CP.enableGasInterceptorDEPRECATED
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stopping_condition = should_stop
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starting_condition = (not should_stop and
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not cruise_standstill and
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not brake_pressed)
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started_condition = v_ego > starpilot_toggles.vEgoStarting
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if not active:
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long_control_state = LongCtrlState.off
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else:
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if long_control_state == LongCtrlState.off:
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if not starting_condition:
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long_control_state = LongCtrlState.stopping
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else:
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if starting_condition and CP.startingState:
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long_control_state = LongCtrlState.starting
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else:
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long_control_state = LongCtrlState.pid
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elif long_control_state == LongCtrlState.stopping:
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if starting_condition and CP.startingState:
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long_control_state = LongCtrlState.starting
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elif starting_condition:
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long_control_state = LongCtrlState.pid
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elif long_control_state in [LongCtrlState.starting, LongCtrlState.pid]:
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if stopping_condition:
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long_control_state = LongCtrlState.stopping
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elif started_condition:
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long_control_state = LongCtrlState.pid
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return long_control_state
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def long_control_state_trans_old_long(CP, active, long_control_state, v_ego, v_target,
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v_target_1sec, brake_pressed, cruise_standstill, starpilot_toggles):
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accelerating = v_target_1sec > v_target
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planned_stop = (v_target < starpilot_toggles.vEgoStopping and
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v_target_1sec < starpilot_toggles.vEgoStopping and
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not accelerating)
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stay_stopped = (v_ego < starpilot_toggles.vEgoStopping and
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(brake_pressed or cruise_standstill))
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stopping_condition = planned_stop or stay_stopped
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starting_condition = (v_target_1sec > starpilot_toggles.vEgoStarting and
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accelerating and
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not cruise_standstill and
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not brake_pressed)
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started_condition = v_ego > starpilot_toggles.vEgoStarting
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if not active:
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long_control_state = LongCtrlState.off
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else:
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if long_control_state in (LongCtrlState.off, LongCtrlState.pid):
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long_control_state = LongCtrlState.pid
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if stopping_condition:
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long_control_state = LongCtrlState.stopping
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elif long_control_state == LongCtrlState.stopping:
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if starting_condition and CP.startingState:
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long_control_state = LongCtrlState.starting
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elif starting_condition:
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long_control_state = LongCtrlState.pid
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elif long_control_state == LongCtrlState.starting:
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if stopping_condition:
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long_control_state = LongCtrlState.stopping
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elif started_condition:
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long_control_state = LongCtrlState.pid
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return long_control_state
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class LongControl:
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def __init__(self, CP):
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self.CP = CP
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self.long_control_state = LongCtrlState.off
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self.experimental_mode = False
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self.pid = PIDController((CP.longitudinalTuning.kpBP, CP.longitudinalTuning.kpV),
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(CP.longitudinalTuning.kiBP, CP.longitudinalTuning.kiV),
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rate=1 / DT_CTRL)
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# Preserve legacy behaviour when no feedforward gain is provided (default of 0.0)
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kf = getattr(CP.longitudinalTuning, 'kfDEPRECATED', 0.0)
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self.feedforward_gain = kf if kf != 0.0 else 1.0
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self.v_pid = 0.0
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self._mode_setup()
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self.last_output_accel = 0.0
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self.last_a_target = 0.0
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self.integrator_hold_frames = 0
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self.is_gm_pedal_long = bool(
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CP.brand == "gm" and CP.enableGasInterceptorDEPRECATED and (CP.flags & GMFlags.PEDAL_LONG.value)
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)
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def update_mpc_mode(self, experimental_mode):
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new_mode = 'blended' if experimental_mode else 'acc'
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if self.transitioning and self.prev_mode == 'blended' and self.current_mode == 'acc':
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self.mode_transition_timer = 0.0
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if new_mode != self.current_mode:
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self.prev_mode = self.current_mode
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self.transitioning = True
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self.mode_transition_timer = 0.0
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self.mode_transition_filter.x = self.last_output_accel
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self.current_mode = new_mode
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if self.transitioning:
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self.mode_transition_timer += DT_CTRL
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if self.mode_transition_timer >= self.mode_transition_duration:
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self.transitioning = False
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def _mode_setup(self):
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self.prev_mode = 'acc'
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self.current_mode = 'acc'
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self.mode_transition_filter = FirstOrderFilter(0.0, 0.5, DT_CTRL)
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self.mode_transition_timer = 0.0
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self.mode_transition_duration = 1.0
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self.transitioning = False
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def reset(self):
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self.pid.reset()
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self.last_a_target = 0.0
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self.integrator_hold_frames = 0
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def _get_pedal_long_freeze(self, a_target, error, v_ego, accel_limits):
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if not self.is_gm_pedal_long:
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self.last_a_target = a_target
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self.integrator_hold_frames = 0
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return False
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handoff_threshold = interp(v_ego, [0.0, 4.0, 12.0, 25.0], [0.35, 0.45, 0.55, 0.70])
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if abs(a_target - self.last_a_target) > handoff_threshold:
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hold_frames = int(round(interp(v_ego, [0.0, 4.0, 12.0, 25.0], [25.0, 20.0, 14.0, 10.0])))
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self.integrator_hold_frames = max(self.integrator_hold_frames, hold_frames)
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self.last_a_target = a_target
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if self.integrator_hold_frames > 0:
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self.integrator_hold_frames -= 1
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sat_buffer = 0.03
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at_neg_sat = self.last_output_accel <= (accel_limits[0] + sat_buffer)
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at_pos_sat = self.last_output_accel >= (accel_limits[1] - sat_buffer)
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sat_pushing_lower = at_neg_sat and error < -0.05
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sat_pushing_upper = at_pos_sat and error > 0.05
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return self.integrator_hold_frames > 0 or sat_pushing_lower or sat_pushing_upper
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def update(self, active, CS, a_target, should_stop, accel_limits, starpilot_toggles):
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"""Update longitudinal control. This updates the state machine and runs a PID loop"""
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self.pid.neg_limit = accel_limits[0]
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self.pid.pos_limit = accel_limits[1]
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self.long_control_state = long_control_state_trans(self.CP, active, self.long_control_state, CS.vEgo,
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should_stop, CS.brakePressed,
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CS.cruiseState.standstill, starpilot_toggles)
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if self.long_control_state == LongCtrlState.off:
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self.reset()
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output_accel = 0.
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elif self.long_control_state == LongCtrlState.stopping:
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output_accel = self.last_output_accel
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if output_accel > starpilot_toggles.stopAccel:
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output_accel = min(output_accel, 0.0)
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output_accel -= starpilot_toggles.stoppingDecelRate * DT_CTRL
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self.reset()
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elif self.long_control_state == LongCtrlState.starting:
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output_accel = (a_target if starpilot_toggles.human_acceleration else starpilot_toggles.startAccel)
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self.reset()
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else: # LongCtrlState.pid
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error = a_target - CS.aEgo
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self.update_mpc_mode(self.experimental_mode)
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feedforward = a_target * self.feedforward_gain
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freeze_integrator = self._get_pedal_long_freeze(a_target, error, CS.vEgo, accel_limits)
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raw_output_accel = self.pid.update(error, speed=CS.vEgo, feedforward=feedforward,
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freeze_integrator=freeze_integrator)
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if self.transitioning and self.prev_mode == 'acc' and self.current_mode == 'blended':
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if raw_output_accel < 0 and raw_output_accel < self.last_output_accel:
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progress = min(1.0, self.mode_transition_timer / self.mode_transition_duration)
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# Soften transition at low urgency, but keep sharp for high decel
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# 20% smoother for chill decel (lower exponent)
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urgency = abs(raw_output_accel / CarControllerParams.ACCEL_MIN)
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urgency_smooth = min(1.0, urgency ** 0.4) # 20% smoother for chill decel
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blend_factor = 1.0 - (1.0 - progress) * (1.0 - urgency_smooth)
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output_accel = self.last_output_accel + (raw_output_accel - self.last_output_accel) * blend_factor
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else:
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output_accel = raw_output_accel
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else:
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output_accel = raw_output_accel
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self.last_output_accel = clip(output_accel, accel_limits[0], accel_limits[1])
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return self.last_output_accel
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def reset_old_long(self, v_pid):
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"""Reset PID controller and change setpoint"""
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self.pid.reset()
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self.v_pid = v_pid
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self.last_a_target = 0.0
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self.integrator_hold_frames = 0
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def update_old_long(self, active, CS, long_plan, accel_limits, t_since_plan, starpilot_toggles):
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"""Update longitudinal control. This updates the state machine and runs a PID loop"""
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# Interp control trajectory
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speeds = long_plan.speeds
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if len(speeds) == CONTROL_N:
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v_target_now = interp(t_since_plan, CONTROL_N_T_IDX, speeds)
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a_target_now = interp(t_since_plan, CONTROL_N_T_IDX, long_plan.accels)
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v_target = interp(starpilot_toggles.longitudinalActuatorDelay + t_since_plan, CONTROL_N_T_IDX, speeds)
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a_target = 2 * (v_target - v_target_now) / starpilot_toggles.longitudinalActuatorDelay - a_target_now
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v_target_1sec = interp(starpilot_toggles.longitudinalActuatorDelay + t_since_plan + 1.0, CONTROL_N_T_IDX, speeds)
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else:
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v_target = 0.0
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v_target_now = 0.0
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v_target_1sec = 0.0
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a_target = 0.0
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self.pid.neg_limit = accel_limits[0]
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self.pid.pos_limit = accel_limits[1]
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output_accel = self.last_output_accel
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self.long_control_state = long_control_state_trans_old_long(self.CP, active, self.long_control_state, CS.vEgo,
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v_target, v_target_1sec, CS.brakePressed,
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CS.cruiseState.standstill, starpilot_toggles)
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if self.long_control_state == LongCtrlState.off:
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self.reset_old_long(CS.vEgo)
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output_accel = 0.
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elif self.long_control_state == LongCtrlState.stopping:
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if output_accel > starpilot_toggles.stopAccel:
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output_accel = min(output_accel, 0.0)
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output_accel -= starpilot_toggles.stoppingDecelRate * DT_CTRL
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self.reset_old_long(CS.vEgo)
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elif self.long_control_state == LongCtrlState.starting:
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output_accel = starpilot_toggles.startAccel
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self.reset_old_long(CS.vEgo)
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elif self.long_control_state == LongCtrlState.pid:
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self.v_pid = v_target_now
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# Toyota starts braking more when it thinks you want to stop
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# Freeze the integrator so we don't accelerate to compensate, and don't allow positive acceleration
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# TODO too complex, needs to be simplified and tested on toyotas
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prevent_overshoot = not self.CP.stoppingControl and CS.vEgo < 1.5 and v_target_1sec < 0.7 and v_target_1sec < self.v_pid
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deadzone = interp(CS.vEgo, self.CP.longitudinalTuning.deadzoneBP, self.CP.longitudinalTuning.deadzoneV)
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error = self.v_pid - CS.vEgo
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error_deadzone = apply_deadzone(error, deadzone)
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freeze_integrator = prevent_overshoot or self._get_pedal_long_freeze(a_target, error_deadzone, CS.vEgo, accel_limits)
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feedforward = a_target * self.feedforward_gain
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output_accel = self.pid.update(error_deadzone, speed=CS.vEgo,
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feedforward=feedforward,
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freeze_integrator=freeze_integrator)
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self.last_output_accel = clip(output_accel, accel_limits[0], accel_limits[1])
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return self.last_output_accel
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