import sys import numpy as np from scipy.spatial.transform import Rotation as R from .base_controller import BaseController from .arm_state import ArmState from pathlib import Path sys.path.append(str(Path(__file__).resolve().parent.parent)) import time from tools.yaml_operator import read_yaml import random class AdmittanceController(BaseController): def __init__(self, name, state:ArmState,config_path) -> None: super().__init__(name, state) self.load_config(config_path) def load_config(self, config_path): config_dict = read_yaml(config_path) if self.name != config_dict['name']: raise ValueError(f"Controller name {self.name} does not match config name {config_dict['name']}") mass_tran = np.array(config_dict['mass_tran']) mass_rot = np.array(config_dict['mass_rot']) stiff_tran = np.array(config_dict['stiff_tran']) stiff_rot = np.array(config_dict['stiff_rot']) desired_xi = np.array(config_dict['desired_xi']) damp_tran = np.array(config_dict['damp_tran']) damp_rot = np.array(config_dict['damp_rot']) self.pos_scale_factor = config_dict['pos_scale_factor'] self.rot_scale_factor = config_dict['rot_scale_factor'] for i in range(3): if damp_tran[i] < 0: damp_tran[i] = 2 * desired_xi * np.sqrt(stiff_tran[i] * mass_tran[i]) if damp_rot[i] < 0: damp_rot[i] = 2 * desired_xi * np.sqrt(stiff_rot[i] * mass_rot[i]) self.M = np.diag(np.concatenate([mass_tran, mass_rot])) self.M_inv = np.linalg.inv(self.M) self.K = np.diag(np.concatenate([stiff_tran, stiff_rot])) self.D = np.diag(np.concatenate([damp_tran, damp_rot])) self.laset_print_time = 0 def step(self,dt): # 方向统一 if self.state.desired_orientation.dot(self.state.arm_orientation) < 0: self.state.arm_orientation = -self.state.arm_orientation # 缓存常用计算 arm_ori_quat = R.from_quat(self.state.arm_orientation) arm_ori_mat = arm_ori_quat.as_matrix() # 位置误差 temp_pose_error = self.state.arm_position - self.state.desired_position self.state.pose_error[:3] = arm_ori_mat.T @ temp_pose_error # 姿态误差(四元数) rot_err_quat = arm_ori_quat.inv() * R.from_quat(self.state.desired_orientation) self.state.pose_error[3:] = -rot_err_quat.as_rotvec(degrees=False) # 期望加速度 wrench_err = self.state.external_wrench_tcp - self.state.desired_wrench KD_vel = self.D @ (self.state.arm_desired_twist - self.state.desired_twist) KD_pose = self.K @ self.state.pose_error self.state.arm_desired_acc = self.M_inv @ (wrench_err - KD_vel - KD_pose) self.clip_command(self.state.arm_desired_acc, "acc") ## 更新速度和位姿 self.state.arm_desired_twist += self.state.arm_desired_acc * dt self.clip_command(self.state.arm_desired_twist, "vel") # 计算位姿变化 delta_pose = np.concatenate([ arm_ori_mat @ (self.state.arm_desired_twist[:3] * dt), self.state.arm_desired_twist[3:] * dt ]) self.clip_command(delta_pose, "pose") # 更新四元数 delta_ori_quat = R.from_rotvec(delta_pose[3:]).as_quat() arm_ori_quat_new = arm_ori_quat * R.from_quat(delta_ori_quat) self.state.arm_orientation_command = arm_ori_quat_new.as_quat() # 归一化四元数 self.state.arm_orientation_command /= np.linalg.norm(self.state.arm_orientation_command) # 更新位置 self.state.arm_position_command = self.state.arm_position + delta_pose[:3] # # 计算误差 位置直接作差，姿态误差以旋转向量表示 # temp_pose_error = self.state.arm_position - self.state.desired_position # if self.state.desired_orientation.dot(self.state.arm_orientation) < 0: # self.state.arm_orientation = -self.state.arm_orientation # self.state.pose_error[:3] = R.from_quat(self.state.arm_orientation).as_matrix().T @ temp_pose_error # rot_err_mat = R.from_quat(self.state.arm_orientation).as_matrix().T @ R.from_quat(self.state.desired_orientation).as_matrix() # rot_err_rotvex = R.from_matrix(rot_err_mat).as_rotvec(degrees=False) # self.state.pose_error[3:] = -rot_err_rotvex # wrench_err = self.state.external_wrench_tcp - self.state.desired_wrench # self.state.arm_desired_acc = self.M_inv @ (wrench_err - self.D @ (self.state.arm_desired_twist -self.state.desired_twist) - self.K @ self.state.pose_error) # self.clip_command(self.state.arm_desired_acc,"acc") # self.state.arm_desired_twist = self.state.arm_desired_acc * dt + self.state.arm_desired_twist # self.clip_command(self.state.arm_desired_twist,"vel") # delta_pose = self.state.arm_desired_twist * dt # delta_pose[:3] = R.from_quat(self.state.arm_orientation).as_matrix() @ delta_pose[:3] # self.clip_command(delta_pose,"pose") # # testlsy # delta_ori_mat = R.from_rotvec(delta_pose[3:]).as_matrix() # ## 关闭姿态转动 # # random_array = np.random.rand(3) # 生成长度为 3 的数组 # # delta_ori_mat = R.from_rotvec(random_array/100000).as_matrix() # arm_ori_mat = delta_ori_mat @ R.from_quat(self.state.arm_orientation).as_matrix() # arm_ori_mat = R.from_quat(self.state.arm_orientation).as_matrix() @ delta_ori_mat # self.state.arm_orientation_command = R.from_matrix(arm_ori_mat).as_quat() # # 归一化四元数 # self.state.arm_orientation_command /= np.linalg.norm(self.state.arm_orientation_command) # self.state.arm_position_command = self.state.arm_position + delta_pose[:3] # # if time.time() - self.laset_print_time > 2: # # print("-------------admittance_1-------------------------------") # # print("arm_position:",self.state.arm_position) # # print("desired_position:",self.state.desired_position) # # print(f'wrench_err: {wrench_err} ||| external_wrench_tcp: {self.state.external_wrench_tcp} ||| desired_wrench: {self.state.desired_wrench}') # # print("self.state.arm_desired_acc:",self.state.arm_desired_acc) # # print("arm_orientation",R.from_quat(self.state.arm_orientation).as_euler('xyz',degrees=True)) # # print("desired_orientation",R.from_quat(self.state.desired_orientation).as_euler('xyz',degrees=True)) # # print("arm_position_command",self.state.arm_position_command) # # print("arm_orientation_command",R.from_quat(self.state.arm_orientation_command).as_euler('xyz',degrees=True)) # # print("delta_pose:",delta_pose) # # print("delta_ori_mat",delta_ori_mat) # # self.laset_print_time = time.time() if __name__ == "__main__": state = ArmState() controller = AdmittanceController("admittance",state,"/home/zyc/admittance_control/MassageControl/config/admittance.yaml") print(controller.name) print(controller.state.arm_position) state.arm_position = np.array([1,2,3]) print(controller.state.arm_position) print(controller.M) print(controller.D) print(controller.K)