# 神经网络预测参考轨迹
reference_trajectory = neural_net.predict(observation)

# 优化器跟踪轨迹
control = optimizer.track(reference_trajectory, constraints)

# 优化问题
minimize    sum(||f_i - f_desired||^2)  # 接触力偏差
subject to:
    # 动力学约束
    m * a_com = sum(f_i) + m * g
    I * alpha = sum(r_i × f_i)

    # 摩擦锥约束
    ||f_i_tangent|| <= mu * f_i_normal

    # 单侧约束
    f_i_normal >= 0

    # ZMP 约束
    ZMP in support_polygon

class DiffusionMPCController:
    def __init__(self):
        self.diffusion_policy = DiffusionPolicy()
        self.mpc = MPCController(horizon=20, dt=0.05)

    def control_step(self, observation):
        # Diffusion Policy 生成动作序列
        action_sequence = self.diffusion_policy.predict(
            observation,
            horizon=16,  # 预测未来 16 步
            num_samples=10  # 采样 10 条轨迹
        )

        # 选择最优轨迹（可选）
        best_trajectory = self.select_best(action_sequence)

        # 转换为 MPC 参考轨迹
        x_ref = self.action_to_state(best_trajectory)

        # MPC 跟踪轨迹
        u_opt = self.mpc.solve(
            x_current=self.get_state(),
            x_ref=x_ref,
            constraints={
                'joint_limits': True,
                'friction_cone': True,
                'stability': True
            }
        )

        return u_opt[0]  # 执行第一步

# Diffusion Policy 输出高层目标
goal = diffusion_policy.predict_goal(observation)
# 例如: {"grasp_position": [x, y, z],
#        "contact_points": [...],
#        "gait_parameters": {...}}

# MPC 以此为终端约束
mpc.set_terminal_constraint(goal)
u_opt = mpc.solve(x_current)

class VLAMPCController:
    def __init__(self):
        self.vla = VLAModel()  # RT-2, OpenVLA, etc.
        self.mpc = MPCController(horizon=20, dt=0.05)
        self.update_freq = 10  # VLA 更新频率 (Hz)

    def control_step(self, obs, language_command):
        # 高层策略更新（较慢）
        if self.frame % (self.control_freq // self.update_freq) == 0:
            # VLA 预测
            vla_output = self.vla.predict(
                image=obs['camera'],
                language=language_command,
                proprioception=obs['joint_states']
            )

            # 解析 VLA 输出
            reference_traj = self.parse_vla_output(vla_output)
            self.mpc.set_reference(reference_traj)

        # 低层优化（快速）
        current_state = obs['robot_state']
        u_opt = self.mpc.solve(
            current_state,
            constraints={
                'friction_cone': True,
                'joint_limits': True,
                'stability': True,
                'collision_avoidance': True
            }
        )

        return u_opt[0]

    def parse_vla_output(self, vla_output):
        """将 VLA 输出转换为 MPC 参考轨迹"""
        # 示例: VLA 输出末端执行器位姿
        ee_pose = vla_output['end_effector_pose']

        # 使用逆运动学生成关节轨迹
        joint_traj = self.inverse_kinematics(ee_pose)

        return joint_traj

import threading

class AsyncController:
    def __init__(self):
        self.reference_traj = None
        self.lock = threading.Lock()

        # 启动高层策略线程
        self.policy_thread = threading.Thread(
            target=self.update_policy_loop
        )
        self.policy_thread.start()

    def update_policy_loop(self):
        while True:
            new_traj = self.diffusion_policy.predict(self.obs)
            with self.lock:
                self.reference_traj = new_traj
            time.sleep(0.1)  # 10 Hz 更新

    def control_step(self):
        with self.lock:
            ref = self.reference_traj

        # MPC 使用缓存的参考轨迹
        u = self.mpc.solve(self.state, ref)
        return u

def project_to_feasible(x_ref_infeasible):
    """将不可行参考投影到可行集"""
    x_ref_feasible = solve_qp(
        minimize    ||x - x_ref_infeasible||^2
        subject to  dynamics_constraints(x)
                    stability_constraints(x)
                    joint_limits(x)
    )
    return x_ref_feasible

# 训练时加入物理约束损失
loss = reconstruction_loss + \
       lambda_dynamics * dynamics_violation + \
       lambda_stability * stability_violation

class ClosedLoopController:
    def control_step(self, obs):
        # 计算跟踪误差
        tracking_error = self.x_ref - self.x_actual

        # 将误差作为观测的一部分
        augmented_obs = {
            'vision': obs['camera'],
            'proprioception': obs['joint_states'],
            'tracking_error': tracking_error,  # 新增
            'mpc_cost': self.mpc.last_cost     # 新增
        }

        # 策略根据反馈调整
        new_ref = self.policy.predict(augmented_obs)

        return new_ref

import torch

class DifferentiableMPC(torch.nn.Module):
    def forward(self, x_current, x_ref):
        # 使用可微分优化求解器
        u_opt = cvxpylayers.solve_qp(
            Q, R, x_current, x_ref,
            dynamics_matrix, constraint_matrix
        )
        return u_opt

class LearnedMPC:
    def __init__(self):
        # 学习代价函数权重
        self.Q_net = nn.Linear(obs_dim, state_dim * state_dim)
        self.R_net = nn.Linear(obs_dim, action_dim * action_dim)

    def forward(self, obs, x_current):
        # 根据观测调整权重
        Q = self.Q_net(obs).reshape(state_dim, state_dim)
        R = self.R_net(obs).reshape(action_dim, action_dim)

        # 使用学习的权重求解 MPC
        u_opt = mpc_solve(x_current, Q, R)
        return u_opt

# 生成训练数据
for _ in range(num_samples):
    x = sample_state()
    x_ref = sample_reference()
    u_opt = mpc_solve(x, x_ref)  # 精确求解

    dataset.append((x, x_ref, u_opt))

# 训练神经网络拟合
model.fit(dataset)