300 lines
9.1 KiB
C
300 lines
9.1 KiB
C
/*
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底盘模组
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*/
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/*
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底盘模组
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*/
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#include "cmsis_os2.h"
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#include <stdlib.h>
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#include "bsp/mm.h"
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#include "bsp/can.h"
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#include "component/ahrs.h"
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#include "device/motor_rm.h"
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#include "device/motor.h"
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#include "module/chassis.h"
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/**
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* @brief 底盘小陀螺模式相关参数
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*/
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#define CHASSIS_ROTOR_WZ_MIN 0.6f //小陀螺最小速度
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#define CHASSIS_ROTOR_WZ_MAX 0.8f //小陀螺最大速度
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#define M_7OVER72PI (M_2PI * 7.0f / 72.0f) //角度偏移量（用在跟随云台35°）
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#define CHASSIS_ROTOR_OMEGA 0.001f //角速度变化频率
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/**
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* @brief 设置底盘模式
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* @param c 底盘结构体指针
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* @param mode 目标控制模式
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* @param now 当前时间戳(ms)
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* @return CHASSIS_OK:成功 CHASSIS_ERR_NULL:空
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*/
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static int8_t Chassis_SetMode(Chassis_t *c, Chassis_Mode_t mode, uint32_t now) {
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if (!c)
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return CHASSIS_ERR_NULL;
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if (mode == c->mode)
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return CHASSIS_OK;
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//随机种子，小陀螺模式随机设置旋转方向
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if (mode == CHASSIS_MODE_ROTOR && c->mode != CHASSIS_MODE_ROTOR) {
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srand(now);
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c->wz_multi = (rand() % 2) ? -1 : 1;
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}
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//重置PID和滤波
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for (uint8_t i = 0; i < c->num_wheel; i++) {
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PID_Reset(&c->pid.motor[i]);
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LowPassFilter2p_Reset(&c->filter.in[i], 0.0f);
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LowPassFilter2p_Reset(&c->filter.out[i], 0.0f);
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}
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c->mode = mode;
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return CHASSIS_OK;
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}
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/**
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* @brief 小陀螺模式动态角速度
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* @param min 最小速度
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* @param max 最大速度
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* @param now 当前时间戳(ms)
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* @return 角速度值
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*/
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static float Chassis_CalcWz(const float min, const float max, uint32_t now) {
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float wz_vary = fabsf(0.2f * sinf(CHASSIS_ROTOR_OMEGA * (float)now)) + min;
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return (wz_vary > max) ? max : wz_vary;
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}
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/**
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* @brief 底盘模式初始化
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* @param c 底盘结构体指针
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* @param param 底盘参数结构体指针
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* @param mech_zero 机械零点欧拉角
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* @param target_freq 控制频率(Hz)
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* @return CHASSIS_OK:成功 CHASSIS_ERR_NULL:空 CHASSIS_ERR_TYPE:不支持的模式
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*/
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int8_t Chassis_Init(Chassis_t *c, const Chassis_Params_t *param,
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float target_freq) {
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if (!c) return CHASSIS_ERR_NULL;
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//初始化CAN通信
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BSP_CAN_Init();
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c->param = param;
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c->mode = CHASSIS_MODE_RELAX;
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//根据底盘不同设置模式轮子与混合器
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Mixer_Mode_t mixer_mode;
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switch (param->type) {
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case CHASSIS_TYPE_MECANUM://麦轮
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c->num_wheel = 4;
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mixer_mode = MIXER_MECANUM;
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break;
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case CHASSIS_TYPE_PARLFIX4:
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c->num_wheel = 4;
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mixer_mode = MIXER_PARLFIX4;
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break;
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case CHASSIS_TYPE_PARLFIX2:
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c->num_wheel = 2;
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mixer_mode = MIXER_PARLFIX2;
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break;
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case CHASSIS_TYPE_OMNI_CROSS:
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c->num_wheel = 4;
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mixer_mode = MIXER_OMNICROSS;
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break;
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case CHASSIS_TYPE_OMNI_PLUS: //全向轮（老步兵类型）
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c->num_wheel = 4;
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mixer_mode = MIXER_OMNIPLUS;
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break;
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case CHASSIS_TYPE_SINGLE:
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c->num_wheel = 1;
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mixer_mode = MIXER_SINGLE;
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break;
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default:
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return CHASSIS_ERR_TYPE;
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}
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//初始化时间戳
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c->last_wakeup = 0;
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c->dt = 0.0f;
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//初始化PID和滤波
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for (uint8_t i = 0; i < c->num_wheel; i++) {
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PID_Init(&c->pid.motor[i], KPID_MODE_NO_D, target_freq, ¶m->pid.motor_pid_param);
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LowPassFilter2p_Init(&c->filter.in[i], target_freq, param->low_pass_cutoff_freq.in);
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LowPassFilter2p_Init(&c->filter.out[i], target_freq, param->low_pass_cutoff_freq.out);
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//清零电机反馈
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c->feedback.motor[i].rotor_speed = 0;
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c->feedback.motor[i].torque_current = 0;
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c->feedback.motor[i].rotor_abs_angle = 0;
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c->feedback.motor[i].temp = 0;
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}
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//初始化PID和混合器
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PID_Init(&c->pid.follow, KPID_MODE_NO_D, target_freq, ¶m->pid.follow_pid_param);
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Mixer_Init(&c->mixer, mixer_mode);
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//清零运动向量和输出
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c->move_vec.vx = c->move_vec.vy = c->move_vec.wz = 0.0f;
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for (uint8_t i = 0; i < c->num_wheel; i++) {
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c->out.motor[i] = 0.0f;
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}
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//注册大疆电机
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for (int i = 0; i < c->num_wheel; i++) {
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MOTOR_RM_Register(&(c->param->motor_param[i]));
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}
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return CHASSIS_OK;
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}
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/**
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* @brief 更新电机反馈(IMU+电机状态)
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* @param c 底盘结构体指针
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* @param feedback 底盘反馈指针结构体
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* @return CHASSIS_OK:成功 CHASSIS_ERR_NULL:空
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*/
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int8_t Chassis_UpdateFeedback(Chassis_t *c) {
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//更新所有电机反馈
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for (uint8_t i = 0; i < c->num_wheel; i++) {
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MOTOR_RM_Update(&(c->param->motor_param[i]));
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MOTOR_RM_t *rm_motor = MOTOR_RM_GetMotor(&(c->param->motor_param[i]));
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c->motors[i] = rm_motor;
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MOTOR_RM_t *rm = c->motors[i];
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if (rm_motor != NULL) {
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c->feedback.motor[i] = rm_motor->feedback;
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}else
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{
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return CHASSIS_ERR_NULL;
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}
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}
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return CHASSIS_OK;
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}
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/**
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* @brief 底盘电机控制
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* @param c 底盘结构体指针
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* @param c_cmd 控制命令
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* @param now 当前时间戳(ms)
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* @return CHASSIS_OK:成功 CHASSIS_ERR_NULL:空
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*/
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int8_t Chassis_Control(Chassis_t *c, const Chassis_CMD_t *c_cmd, uint32_t now) {
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if (!c || !c_cmd) return CHASSIS_ERR_NULL;
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//计算控制周期
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c->dt = (float)(now - c->last_wakeup) / 1000.0f;
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c->last_wakeup = now;
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if (!isfinite(c->dt) || c->dt <= 0.0f) {
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c->dt = 0.001f;
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}
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if (c->dt < 0.0005f) c->dt = 0.0005f;
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if (c->dt > 0.050f) c->dt = 0.050f;
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//设置模式
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Chassis_SetMode(c, c_cmd->mode, now);
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//不同模式下对应解算（运动向量）
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switch (c->mode) {
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case CHASSIS_MODE_BREAK:
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c->move_vec.vx = c->move_vec.vy = 0.0f;
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break;
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case CHASSIS_MODE_INDEPENDENT:
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c->move_vec.vx = c_cmd->ctrl_vec.vx;
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c->move_vec.vy = c_cmd->ctrl_vec.vy;
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break;
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default: { //遥控器坐标->机体坐标系
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float beta = c->feedback.encoder_gimbalYawMotor - c->mech_zero;
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float cosb = cosf(beta);
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float sinb = sinf(beta);
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c->move_vec.vx = cosb * c_cmd->ctrl_vec.vx - sinb * c_cmd->ctrl_vec.vy;
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c->move_vec.vy = sinb * c_cmd->ctrl_vec.vx + cosb * c_cmd->ctrl_vec.vy;
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break;
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}
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}
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//根据模式计算底盘角速度
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switch (c->mode) {
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case CHASSIS_MODE_RELAX:
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case CHASSIS_MODE_BREAK:
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case CHASSIS_MODE_INDEPENDENT:
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c->move_vec.wz = 0.0f;
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break;
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case CHASSIS_MODE_OPEN:
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c->move_vec.wz = c_cmd->ctrl_vec.wz;
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break;
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//云台跟随
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case CHASSIS_MODE_FOLLOW_GIMBAL:
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c->move_vec.wz = PID_Calc(&c->pid.follow, c->mech_zero, c->feedback.encoder_gimbalYawMotor, 0.0f, c->dt);
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break;
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//云台跟随（偏移）
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case CHASSIS_MODE_FOLLOW_GIMBAL_35:
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c->move_vec.wz = PID_Calc(&c->pid.follow,c->mech_zero +M_7OVER72PI, c->feedback.encoder_gimbalYawMotor, 0.0f, c->dt);
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break;
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//小陀螺
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case CHASSIS_MODE_ROTOR:
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c->move_vec.wz = c->wz_multi * Chassis_CalcWz(CHASSIS_ROTOR_WZ_MIN,CHASSIS_ROTOR_WZ_MAX, now);
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break;
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}
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//运动学逆解算，运动向量分解为电机转速
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Mixer_Apply(&c->mixer, &c->move_vec, c->setpoint.motor_rpm, c->num_wheel, 500.0f);
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for (uint8_t i = 0; i < c->num_wheel; i++) {
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float rf = c->setpoint.motor_rpm[i];///目标转速
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float fb = LowPassFilter2p_Apply(&c->filter.in[i], (float)c->feedback.motor[i].rotor_speed);
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float out_current;
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switch (c->mode) {
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case CHASSIS_MODE_BREAK:
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case CHASSIS_MODE_FOLLOW_GIMBAL:
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case CHASSIS_MODE_FOLLOW_GIMBAL_35:
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case CHASSIS_MODE_ROTOR:
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case CHASSIS_MODE_INDEPENDENT:
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out_current = PID_Calc(&c->pid.motor[i], c->setpoint.motor_rpm[i], fb, 0.0f, c->dt);
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break;
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case CHASSIS_MODE_OPEN:
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out_current = c->setpoint.motor_rpm[i] / 7000.0f;
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break;
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case CHASSIS_MODE_RELAX:
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out_current = 0.0f;
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break;
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}
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//低通滤波和限幅
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c->out.motor[i] = LowPassFilter2p_Apply(&c->filter.out[i], out_current);
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Clip(&c->out.motor[i], -c->param->limit.max_current, c->param->limit.max_current);
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}
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return CHASSIS_OK;
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}
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/**
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* @brief 电机输出
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* @param c 底盘结构体指针
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*/
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void Chassis_Output(Chassis_t *c) {
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if (!c)
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return;
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//每个电机目标输出
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for (uint8_t i = 0; i < c->num_wheel; i++) {
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MOTOR_RM_t *rm = c->motors[i];
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if (!rm) continue;
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MOTOR_RM_SetOutput(&rm->param, c->out.motor[i]);
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}
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//调用ctrl
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for (uint8_t i = 0; i < c->num_wheel; i++) {
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MOTOR_RM_t *rm = c->motors[i];
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if (rm) {
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MOTOR_RM_Ctrl(&rm->param);
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}
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}
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}
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/**
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* @brief 重置底盘输出
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* @param c 底盘结构体指针
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*/
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void Chassis_ResetOutput(Chassis_t *c) {
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if (!c) return;
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for (uint8_t i = 0; i < c->num_wheel; i++) {
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MOTOR_RM_t *m = c->motors[i];
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if (m) {
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MOTOR_RM_Relax(&(m->param));
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}
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}
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}
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