Team2890/allwpilib
4
0
Fork 0
mirror of https://github.com/wpilibsuite/allwpilib synced 2026-06-20 00:51:42 +00:00
Code Issues Packages Projects Releases Wiki Activity

[wpilib] Add pose estimators (#2867)

Browse Source 
Pose and state estimators can filter latency-compensated global measurements and fuse them with state-space drivetrain model information to estimate robot position. They are drop-in replacements for the existing odometry classes.

Co-authored-by: Declan Freeman-Gleason <declanfreemangleason@gmail.com>
Co-authored-by: Prateek Machiraju <prateek.machiraju@gmail.com>
Co-authored-by: Claudius Tewari <cttewari@gmail.com>
Co-authored-by: Matt <matthew.morley.ca@gmail.com>
This commit is contained in:
Declan Freeman-Gleason
2020-11-28 17:35:35 -05:00
committed by GitHub
parent 3413bfc06a
commit bc8f338771
58 changed files with 4958 additions and 39 deletions
Download Patch File Download Diff File Expand all files Collapse all files

76
wpilibcExamples/src/main/cpp/examples/MecanumDrivePoseEstimator/include/Drivetrain.h Normal file
View File

@@ -0,0 +1,76 @@
/*----------------------------------------------------------------------------*/
/* Copyright (c) 2019-2020 FIRST. All Rights Reserved. */
/* Open Source Software - may be modified and shared by FRC teams. The code */
/* must be accompanied by the FIRST BSD license file in the root directory of */
/* the project. */
/*----------------------------------------------------------------------------*/
#pragma once
#include <frc/AnalogGyro.h>
#include <frc/Encoder.h>
#include <frc/PWMVictorSPX.h>
#include <frc/controller/PIDController.h>
#include <frc/controller/SimpleMotorFeedforward.h>
#include <frc/estimator/MecanumDrivePoseEstimator.h>
#include <frc/geometry/Translation2d.h>
#include <frc/kinematics/MecanumDriveKinematics.h>
#include <frc/kinematics/MecanumDriveOdometry.h>
#include <frc/kinematics/MecanumDriveWheelSpeeds.h>
#include <wpi/math>
/**
* Represents a mecanum drive style drivetrain.
*/
class Drivetrain {
public:
Drivetrain() { m_gyro.Reset(); }
frc::MecanumDriveWheelSpeeds GetCurrentState() const;
void SetSpeeds(const frc::MecanumDriveWheelSpeeds& wheelSpeeds);
void Drive(units::meters_per_second_t xSpeed,
units::meters_per_second_t ySpeed, units::radians_per_second_t rot,
bool fieldRelative);
void UpdateOdometry();
static constexpr auto kMaxSpeed = 3.0_mps; // 3 meters per second
static constexpr units::radians_per_second_t kMaxAngularSpeed{
wpi::math::pi}; // 1/2 rotation per second
private:
frc::PWMVictorSPX m_frontLeftMotor{1};
frc::PWMVictorSPX m_frontRightMotor{2};
frc::PWMVictorSPX m_backLeftMotor{3};
frc::PWMVictorSPX m_backRightMotor{4};
frc::Encoder m_frontLeftEncoder{0, 1};
frc::Encoder m_frontRightEncoder{2, 3};
frc::Encoder m_backLeftEncoder{4, 5};
frc::Encoder m_backRightEncoder{6, 7};
frc::Translation2d m_frontLeftLocation{0.381_m, 0.381_m};
frc::Translation2d m_frontRightLocation{0.381_m, -0.381_m};
frc::Translation2d m_backLeftLocation{-0.381_m, 0.381_m};
frc::Translation2d m_backRightLocation{-0.381_m, -0.381_m};
frc2::PIDController m_frontLeftPIDController{1.0, 0.0, 0.0};
frc2::PIDController m_frontRightPIDController{1.0, 0.0, 0.0};
frc2::PIDController m_backLeftPIDController{1.0, 0.0, 0.0};
frc2::PIDController m_backRightPIDController{1.0, 0.0, 0.0};
frc::AnalogGyro m_gyro{0};
frc::MecanumDriveKinematics m_kinematics{
m_frontLeftLocation, m_frontRightLocation, m_backLeftLocation,
m_backRightLocation};
// Gains are for example purposes only - must be determined for your own
// robot!
frc::SimpleMotorFeedforward<units::meters> m_feedforward{1_V, 3_V / 1_mps};
// Gains are for example purposes only - must be determined for your own
// robot!
frc::MecanumDrivePoseEstimator m_poseEstimator{
frc::Rotation2d(), frc::Pose2d(), m_kinematics,
{0.1, 0.1, 0.1}, {0.05}, {0.1, 0.1, 0.1}};
};