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[JTC] Add tests for acceleration command interface (backport ros-cont…
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…rols#752)
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@christophfroehlich
christophfroehlich committed Nov 30, 2023
1 parent ff82137 commit 281eed5
Showing 1 changed file with 86 additions and 27 deletions.
113 changes: 86 additions & 27 deletions joint_trajectory_controller/test/test_trajectory_controller.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -16,6 +16,7 @@

#include <array>
#include <chrono>
#include <cmath>
#include <future>
#include <limits>
#include <memory>
Expand Down Expand Up @@ -57,8 +58,6 @@ using lifecycle_msgs::msg::State;
using test_trajectory_controllers::TrajectoryControllerTest;
using test_trajectory_controllers::TrajectoryControllerTestParameterized;

bool is_same_sign(double val1, double val2) { return val1 * val2 >= 0.0; }

void spin(rclcpp::executors::MultiThreadedExecutor * exe) { exe->spin(); }

TEST_P(TrajectoryControllerTestParameterized, configure_state_ignores_commands)
Expand Down Expand Up @@ -1010,7 +1009,7 @@ TEST_P(TrajectoryControllerTestParameterized, velocity_error)
|| (traj_controller_->has_velocity_state_interface() &&
traj_controller_->has_velocity_command_interface()))
{
// don't check against a value, because spline intepolation might overshoot depending on
// don't check against a value, because spline interpolation might overshoot depending on
// interface combinations
EXPECT_GE(state_msg->error.velocities[0], points_velocities[0][0]);
EXPECT_GE(state_msg->error.velocities[1], points_velocities[0][1]);
Expand All @@ -1028,50 +1027,82 @@ TEST_P(TrajectoryControllerTestParameterized, test_jumbled_joint_order)
{
rclcpp::executors::SingleThreadedExecutor executor;
SetUpAndActivateTrajectoryController(executor);
std::vector<double> points_positions = {1.0, 2.0, 3.0};
std::vector<size_t> jumble_map = {1, 2, 0};
{
trajectory_msgs::msg::JointTrajectory traj_msg;
const std::vector<std::string> jumbled_joint_names{
joint_names_[1], joint_names_[2], joint_names_[0]};
joint_names_[jumble_map[0]], joint_names_[jumble_map[1]], joint_names_[jumble_map[2]]};

traj_msg.joint_names = jumbled_joint_names;
traj_msg.header.stamp = rclcpp::Time(0);
traj_msg.points.resize(1);

traj_msg.points[0].time_from_start = rclcpp::Duration::from_seconds(0.25);
traj_msg.points[0].positions.resize(3);
traj_msg.points[0].positions[0] = 2.0;
traj_msg.points[0].positions[1] = 3.0;
traj_msg.points[0].positions[2] = 1.0;

if (traj_controller_->has_velocity_command_interface())
traj_msg.points[0].positions[0] = points_positions.at(jumble_map[0]);
traj_msg.points[0].positions[1] = points_positions.at(jumble_map[1]);
traj_msg.points[0].positions[2] = points_positions.at(jumble_map[2]);
traj_msg.points[0].velocities.resize(3);
for (size_t i = 0; i < 3; i++)
{
traj_msg.points[0].velocities.resize(3);
traj_msg.points[0].velocities[0] = -0.1;
traj_msg.points[0].velocities[1] = -0.1;
traj_msg.points[0].velocities[2] = -0.1;
// factor 2 comes from the linear interpolation in the spline trajectory for constant
// acceleration
traj_msg.points[0].velocities[i] =
2 * (traj_msg.points[0].positions[i] - joint_pos_[jumble_map[i]]) / 0.25;
}

trajectory_publisher_->publish(traj_msg);
}

traj_controller_->wait_for_trajectory(executor);
// update for 0.25 seconds
// update just before 0.25 seconds (shorter than the trajectory duration of 0.25 seconds,
// otherwise acceleration is zero from the spline trajectory)
// TODO(destogl): Make this time a bit shorter to increase stability on the CI?
// Currently COMMON_THRESHOLD is adjusted.
updateController(rclcpp::Duration::from_seconds(0.25));
updateController(rclcpp::Duration::from_seconds(0.25 - 1e-3));

if (traj_controller_->has_position_command_interface())
{
EXPECT_NEAR(1.0, joint_pos_[0], COMMON_THRESHOLD);
EXPECT_NEAR(2.0, joint_pos_[1], COMMON_THRESHOLD);
EXPECT_NEAR(3.0, joint_pos_[2], COMMON_THRESHOLD);
EXPECT_NEAR(points_positions.at(0), joint_pos_[0], COMMON_THRESHOLD);
EXPECT_NEAR(points_positions.at(1), joint_pos_[1], COMMON_THRESHOLD);
EXPECT_NEAR(points_positions.at(2), joint_pos_[2], COMMON_THRESHOLD);
}

if (traj_controller_->has_velocity_command_interface())
{
// if use_closed_loop_pid_adapter_==false: we expect desired velocities from direct sampling
// if use_closed_loop_pid_adapter_==true: we expect desired velocities, because we use PID with
// feedforward term only
EXPECT_GT(0.0, joint_vel_[0]);
EXPECT_GT(0.0, joint_vel_[1]);
EXPECT_GT(0.0, joint_vel_[2]);
}
// TODO(anyone): add here checks for acceleration commands

if (traj_controller_->has_acceleration_command_interface())
{
if (traj_controller_->has_velocity_state_interface())
{
EXPECT_GT(0.0, joint_acc_[0]);
EXPECT_GT(0.0, joint_acc_[1]);
EXPECT_GT(0.0, joint_acc_[2]);
}
else
{
// no velocity state interface: no acceleration from trajectory sampling
EXPECT_EQ(0.0, joint_acc_[0]);
EXPECT_EQ(0.0, joint_acc_[1]);
EXPECT_EQ(0.0, joint_acc_[2]);
}
}

if (traj_controller_->has_effort_command_interface())
{
// effort should be nonzero, because we use PID with feedforward term
EXPECT_GT(0.0, joint_eff_[0]);
EXPECT_GT(0.0, joint_eff_[1]);
EXPECT_GT(0.0, joint_eff_[2]);
}
}

/**
Expand Down Expand Up @@ -1102,9 +1133,9 @@ TEST_P(TrajectoryControllerTestParameterized, test_partial_joint_list)
traj_msg.points[0].positions[1] = 1.0;
traj_msg.points[0].velocities.resize(2);
traj_msg.points[0].velocities[0] =
copysign(2.0, traj_msg.points[0].positions[0] - initial_joint2_cmd);
std::copysign(2.0, traj_msg.points[0].positions[0] - initial_joint2_cmd);
traj_msg.points[0].velocities[1] =
copysign(1.0, traj_msg.points[0].positions[1] - initial_joint1_cmd);
std::copysign(1.0, traj_msg.points[0].positions[1] - initial_joint1_cmd);

trajectory_publisher_->publish(traj_msg);
}
Expand All @@ -1126,22 +1157,50 @@ TEST_P(TrajectoryControllerTestParameterized, test_partial_joint_list)
{
// estimate the sign of the velocity
// joint rotates forward
EXPECT_TRUE(is_same_sign(traj_msg.points[0].positions[0] - initial_joint2_cmd, joint_vel_[0]));
EXPECT_TRUE(is_same_sign(traj_msg.points[0].positions[1] - initial_joint1_cmd, joint_vel_[1]));
EXPECT_TRUE(
is_same_sign_or_zero(traj_msg.points[0].positions[0] - initial_joint2_cmd, joint_vel_[0]));
EXPECT_TRUE(
is_same_sign_or_zero(traj_msg.points[0].positions[1] - initial_joint1_cmd, joint_vel_[1]));
EXPECT_NEAR(0.0, joint_vel_[2], threshold)
<< "Joint 3 velocity should be 0.0 since it's not in the goal";
}

if (traj_controller_->has_acceleration_command_interface())
{
// estimate the sign of the acceleration
// joint rotates forward
if (traj_controller_->has_velocity_state_interface())
{
EXPECT_TRUE(
is_same_sign_or_zero(traj_msg.points[0].positions[0] - initial_joint2_cmd, joint_acc_[0]))
<< "Joint1: " << traj_msg.points[0].positions[0] - initial_joint2_cmd << " vs. "
<< joint_acc_[0];
EXPECT_TRUE(
is_same_sign_or_zero(traj_msg.points[0].positions[1] - initial_joint1_cmd, joint_acc_[1]))
<< "Joint2: " << traj_msg.points[0].positions[1] - initial_joint1_cmd << " vs. "
<< joint_acc_[1];
}
else
{
// no velocity state interface: no acceleration from trajectory sampling
EXPECT_EQ(0.0, joint_acc_[0]);
EXPECT_EQ(0.0, joint_acc_[1]);
}
EXPECT_NEAR(0.0, joint_acc_[2], threshold)
<< "Joint 3 acc should be 0.0 since it's not in the goal";
}

if (traj_controller_->has_effort_command_interface())
{
// estimate the sign of the effort
// joint rotates forward
EXPECT_TRUE(is_same_sign(traj_msg.points[0].positions[0] - initial_joint2_cmd, joint_eff_[0]));
EXPECT_TRUE(is_same_sign(traj_msg.points[0].positions[1] - initial_joint1_cmd, joint_eff_[1]));
EXPECT_TRUE(
is_same_sign_or_zero(traj_msg.points[0].positions[0] - initial_joint2_cmd, joint_eff_[0]));
EXPECT_TRUE(
is_same_sign_or_zero(traj_msg.points[0].positions[1] - initial_joint1_cmd, joint_eff_[1]));
EXPECT_NEAR(0.0, joint_eff_[2], threshold)
<< "Joint 3 effort should be 0.0 since it's not in the goal";
}
// TODO(anyone): add here checks for acceleration commands

executor.cancel();
}
Expand Down Expand Up @@ -1383,7 +1442,7 @@ TEST_P(TrajectoryControllerTestParameterized, test_trajectory_replace)

RCLCPP_INFO(traj_controller_->get_node()->get_logger(), "Sending new trajectory");
points_partial_new_velocities[0][0] =
copysign(0.15, points_partial_new[0][0] - joint_state_pos_[0]);
std::copysign(0.15, points_partial_new[0][0] - joint_state_pos_[0]);
publish(time_from_start, points_partial_new, rclcpp::Time(), {}, points_partial_new_velocities);

// Replaced trajectory is a mix of previous and current goal
Expand Down

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