v0.1.6; add rem-cts

UPDATE.md

@@ -1,3 +1,6 @@
+# 20260107
+## v0.1.6
+1. 加入`go2_rem_cts`, student使用MoE结构, teacher使用普通CTS, 使用非共享权重和全goal输入
 # 20260106
 ## v0.1.5
 1. 加入`go2_ac_moe_cts`, 参考MoELoco将MoE加载Actor-Critic上, 使用非共享权重和全goal输入

legged_gym/envs/__init__.py

@@ -1,7 +1,7 @@
 from legged_gym import LEGGED_GYM_ROOT_DIR, LEGGED_GYM_ENVS_DIR
 
 from legged_gym.envs.go2.go2_env import Go2Robot
-from legged_gym.envs.go2.go2_config import GO2Cfg, GO2CfgPPO, GO2CfgCTS, GO2CfgMoECTS, GO2CfgMCPCTS, GO2CfgACMoECTS, GO2CfgDualMoECTS
+from legged_gym.envs.go2.go2_config import GO2Cfg, GO2CfgPPO, GO2CfgCTS, GO2CfgMoECTS, GO2CfgMCPCTS, GO2CfgACMoECTS, GO2CfgDualMoECTS, GO2CfgREMCTS
 from .base.legged_robot import LeggedRobot
 
 from legged_gym.utils.task_registry import task_registry
@@ -12,3 +12,4 @@ task_registry.register("go2_moe_cts", Go2Robot, GO2Cfg(), GO2CfgMoECTS())
 task_registry.register("go2_mcp_cts", Go2Robot, GO2Cfg(), GO2CfgMCPCTS())
 task_registry.register("go2_ac_moe_cts", Go2Robot, GO2Cfg(), GO2CfgACMoECTS())
 task_registry.register("go2_dual_moe_cts", Go2Robot, GO2Cfg(), GO2CfgDualMoECTS())
+task_registry.register("go2_rem_cts", Go2Robot, GO2Cfg(), GO2CfgREMCTS())

legged_gym/envs/base/legged_robot_config.py

@@ -385,3 +385,12 @@ class LeggedRobotCfgDualMoECTS(LeggedRobotCfgCTS):
     class runner(LeggedRobotCfgCTS.runner):
         policy_class_name = 'ActorCriticDualMoECTS'
         algorithm_class_name = 'DualMoECTS'
+
+class LeggedRobotCfgREMCTS(LeggedRobotCfgCTS):
+    class policy(LeggedRobotCfgCTS.policy):
+        expert_num = 8 # number of experts in the student model
+        student_encoder_hidden_dims = [512, 256, 128]
+
+    class runner(LeggedRobotCfgCTS.runner):
+        policy_class_name = 'ActorCriticREMCTS'
+        algorithm_class_name = 'REMCTS'

legged_gym/envs/go2/go2_config.py

@@ -1,5 +1,5 @@
 import math
-from legged_gym.envs.base.legged_robot_config import LeggedRobotCfg, LeggedRobotCfgPPO, LeggedRobotCfgCTS, LeggedRobotCfgMoECTS, LeggedRobotCfgMoECTS, LeggedRobotCfgMCPCTS, LeggedRobotCfgACMoECTS, LeggedRobotCfgDualMoECTS
+from legged_gym.envs.base.legged_robot_config import LeggedRobotCfg, LeggedRobotCfgPPO, LeggedRobotCfgCTS, LeggedRobotCfgMoECTS, LeggedRobotCfgMoECTS, LeggedRobotCfgMCPCTS, LeggedRobotCfgACMoECTS, LeggedRobotCfgDualMoECTS, LeggedRobotCfgREMCTS
 
 class GO2Cfg(LeggedRobotCfg):
     class init_state(LeggedRobotCfg.init_state):
@@ -295,3 +295,13 @@ class GO2CfgDualMoECTS(LeggedRobotCfgDualMoECTS):
         experiment_name = 'go2_dual_moe_cts'
         max_iterations = 150000
         save_interval = 500
+
+class GO2CfgREMCTS(LeggedRobotCfgREMCTS):
+    class policy(LeggedRobotCfgREMCTS.policy):
+        expert_num = 8  # number of experts in the student model
+    
+    class runner(LeggedRobotCfgREMCTS.runner):
+        run_name = ''
+        experiment_name = 'go2_rem_cts'
+        max_iterations = 150000
+        save_interval = 500

legged_gym/utils/exporter.py

@@ -82,6 +82,8 @@ class _TorchPolicyExporter(torch.nn.Module):
             self.history_length = policy.history.shape[1]
             self.history = torch.zeros([1, policy.history.shape[1], policy.history.shape[2]], device='cpu')
             self.forward = self.forward_moe_cts
+            if not hasattr(policy, "obs_no_goal_mask"):
+                self.forward = self.forward_rem_cts
         if hasattr(policy, "actor_mcp"):
             self.actor = copy.deepcopy(policy.actor_mcp)
             self.obs_no_goal_mask = copy.deepcopy(policy.obs_no_goal_mask).cpu()
@@ -140,6 +142,13 @@ class _TorchPolicyExporter(torch.nn.Module):
         x = torch.cat([latent, x], dim=1)
         return self.actor(x), (weights, latent)
 
+    def forward_rem_cts(self, x):  # x is single observations
+        x = self.normalizer(x)
+        self.history = torch.cat([self.history[:, 1:], x.unsqueeze(1)], dim=1)
+        latent, weights = self.student_moe_encoder(self.history.flatten(1))
+        x = torch.cat([latent, x], dim=1)
+        return self.actor(x), (weights, latent)
+    
     def forward_mcp_cts(self, x):  # x is single observations
         x = self.normalizer(x)
         self.history = torch.cat([self.history[:, 1:], x.unsqueeze(1)], dim=1)

rsl_rl/rsl_rl/algorithms/__init__.py

@@ -34,3 +34,4 @@ from .moe_cts import MoECTS
 from .mcp_cts import MCPCTS
 from .ac_moe_cts import ACMoECTS
 from .dual_moe_cts import DualMoECTS
+from .rem_cts import REMCTS

rsl_rl/rsl_rl/algorithms/rem_cts.py

@@ -0,0 +1,234 @@
+# SPDX-FileCopyrightText: Copyright (c) 2021 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+# SPDX-License-Identifier: BSD-3-Clause
+# 
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are met:
+#
+# 1. Redistributions of source code must retain the above copyright notice, this
+# list of conditions and the following disclaimer.
+#
+# 2. Redistributions in binary form must reproduce the above copyright notice,
+# this list of conditions and the following disclaimer in the documentation
+# and/or other materials provided with the distribution.
+#
+# 3. Neither the name of the copyright holder nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+# OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+#
+# Copyright (c) 2021 ETH Zurich, Nikita Rudin
+
+import torch
+import torch.nn as nn
+import torch.optim as optim
+
+import itertools
+from rsl_rl.modules import ActorCriticMoECTS
+from rsl_rl.storage import RolloutStorageCTS
+from rsl_rl.algorithms.cts import CTS
+
+class REMCTS(CTS):
+    model: ActorCriticMoECTS
+    def __init__(self,
+                model,
+                num_envs,
+                history_length,
+                num_learning_epochs=1,
+                num_mini_batches=1,
+                clip_param=0.2,
+                gamma=0.998,
+                lam=0.95,
+                value_loss_coef=1.0,
+                entropy_coef=0.0,
+                load_balance_coef=0.01,
+                learning_rate=1e-3,
+                student_encoder_learning_rate=1e-3,
+                max_grad_norm=1.0,
+                use_clipped_value_loss=True,
+                schedule="fixed",
+                desired_kl=0.01,
+                teacher_env_ratio=0.75,
+                device='cpu',
+                ):
+
+        self.device = device
+
+        self.desired_kl = desired_kl
+        self.schedule = schedule
+        self.learning_rate = learning_rate
+        self.history_length = history_length
+
+        # CTS components
+        self.model = model
+        self.model.to(self.device)
+        self.storage = None # initialized later
+        params1 = [
+            {"params": self.model.teacher_encoder.parameters()},
+            {"params": self.model.critic.parameters()},
+            {"params": self.model.actor.parameters()},
+            {"params": self.model.std}
+        ]
+        self.optimizer1 = optim.Adam(params1, lr=learning_rate)
+        self.optimizer2 = optim.Adam(self.model.student_moe_encoder.parameters(), lr=student_encoder_learning_rate)
+        self.transition = RolloutStorageCTS.Transition()
+
+        # CTS parameters
+        self.clip_param = clip_param
+        self.num_learning_epochs = num_learning_epochs
+        self.num_mini_batches = num_mini_batches
+        self.value_loss_coef = value_loss_coef
+        self.entropy_coef = entropy_coef
+        self.load_balance_coef = load_balance_coef
+        self.gamma = gamma
+        self.lam = lam
+        self.max_grad_norm = max_grad_norm
+        self.use_clipped_value_loss = use_clipped_value_loss
+        self.teacher_num_envs = max(int(num_envs * teacher_env_ratio), 1)
+        self.student_num_envs = num_envs - self.teacher_num_envs
+        student_env_ratio = 1 - teacher_env_ratio
+        self.teacher_env_idxs = torch.tensor([i for i in range(num_envs) if i % int(1/student_env_ratio) != 0], device=self.device)
+        self.student_env_idxs = torch.tensor([i for i in range(num_envs) if i % int(1/student_env_ratio) == 0], device=self.device)
+        assert len(self.teacher_env_idxs) == self.teacher_num_envs, f"{len(self.teacher_env_idxs)=} != {self.teacher_num_envs=}"
+        assert len(self.student_env_idxs) == self.student_num_envs, f"{len(self.student_env_idxs)=} != {self.student_num_envs=}"
+
+    def update(self):
+        mean_value_loss = 0
+        mean_surrogate_loss = 0
+        mean_entropy_loss = 0
+        mean_latent_loss = 0
+        mean_load_balance_loss = 0
+        assert not self.model.is_recurrent
+        data = list(self.storage.mini_batch_generator(self.num_mini_batches, self.num_learning_epochs))
+        teacher_samples = self.teacher_num_envs * self.storage.num_transitions_per_env // self.num_mini_batches
+        student_samples = self.student_num_envs * self.storage.num_transitions_per_env // self.num_mini_batches
+        for sample in data:
+            (
+                obs_batch, privileged_obs_batch, actions_batch, history_batch,
+                target_values_batch, advantages_batch, returns_batch,
+                old_actions_log_prob_batch, old_mu_batch, old_sigma_batch,
+                hid_states_batch, masks_batch
+            ) = sample
+            def get_results(start, end, is_teacher):
+                self.model.act(obs_batch[start:end], privileged_obs_batch[start:end], history_batch[start:end], is_teacher)
+                actions_log_prob = self.model.get_actions_log_prob(actions_batch[start:end])
+                value = self.model.evaluate(privileged_obs_batch[start:end], history_batch[start:end], is_teacher)
+                mu = self.model.action_mean
+                sigma = self.model.action_std
+                entropy = self.model.entropy
+                return actions_log_prob, value, mu, sigma, entropy
+            teacher_results = get_results(0, teacher_samples, True)
+            student_results = get_results(teacher_samples, teacher_samples + student_samples, False)
+            results = []
+            for x1, x2 in zip(teacher_results, student_results):
+                results.append(torch.cat([x1, x2], dim=0))
+            actions_log_prob_batch = results[0]
+            value_batch = results[1]
+            mu_batch = results[2]
+            sigma_batch = results[3]
+            entropy_batch = results[4]
+
+            # KL
+            if self.desired_kl != None and self.schedule == 'adaptive':
+                with torch.inference_mode():
+                    kl = torch.sum(
+                        torch.log(
+                            sigma_batch / old_sigma_batch + 1.e-5) + (
+                                torch.square(old_sigma_batch) +
+                                torch.square(old_mu_batch - mu_batch)
+                            ) / (2.0 * torch.square(sigma_batch)) - 0.5, axis=-1)
+                    kl_mean = torch.mean(kl)
+
+                    if kl_mean > self.desired_kl * 2.0:
+                        self.learning_rate = max(1e-5, self.learning_rate / 1.5)
+                    elif kl_mean < self.desired_kl / 2.0 and kl_mean > 0.0:
+                        self.learning_rate = min(1e-2, self.learning_rate * 1.5)
+                    
+                    for param_group in self.optimizer1.param_groups:
+                        param_group['lr'] = self.learning_rate
+
+
+            # Surrogate loss
+            ratio = torch.exp(actions_log_prob_batch - torch.squeeze(old_actions_log_prob_batch))
+            surrogate = -torch.squeeze(advantages_batch) * ratio
+            surrogate_clipped = -torch.squeeze(advantages_batch) * torch.clamp(ratio, 1.0 - self.clip_param,
+                                                                            1.0 + self.clip_param)
+            surrogate_losses = torch.max(surrogate, surrogate_clipped)
+            teacher_surrogate_loss = surrogate_losses[:teacher_samples].mean()
+            student_surrogate_loss = surrogate_losses[teacher_samples:].mean()
+            surrogate_loss = teacher_surrogate_loss + student_surrogate_loss
+            # surrogate_loss = teacher_surrogate_loss
+
+            # Value function loss
+            if self.use_clipped_value_loss:
+                value_clipped = target_values_batch + (value_batch - target_values_batch).clamp(-self.clip_param,
+                                                                                                self.clip_param)
+                value_losses = (value_batch - returns_batch).pow(2)
+                value_losses_clipped = (value_clipped - returns_batch).pow(2)
+                value_loss = torch.max(value_losses, value_losses_clipped).mean()
+            else:
+                value_loss = (returns_batch - value_batch).pow(2).mean()
+            # teacher_value_loss = value_losses[:teacher_samples].mean()
+            # student_value_loss = value_losses[teacher_samples:].mean()
+            # value_loss = teacher_value_loss  # + student_value_loss
+
+            loss = surrogate_loss + self.value_loss_coef * value_loss - self.entropy_coef * entropy_batch.mean()
+
+            # Gradient step
+            self.optimizer1.zero_grad()
+            loss.backward()
+            params_to_clip = itertools.chain.from_iterable(g['params'] for g in self.optimizer1.param_groups)
+            nn.utils.clip_grad_norm_(params_to_clip, self.max_grad_norm)
+            self.optimizer1.step()
+
+            mean_value_loss += value_loss.item()
+            mean_surrogate_loss += surrogate_loss.item()
+            mean_entropy_loss += entropy_batch.mean().item()
+        
+        for sample in data:
+            (
+                obs_batch, privileged_obs_batch, actions_batch, history_batch,
+                target_values_batch, advantages_batch, returns_batch,
+                old_actions_log_prob_batch, old_mu_batch, old_sigma_batch,
+                hid_states_batch, masks_batch
+            ) = sample
+            # Student encoder update
+            student_latent, gating_weights = self.model.student_moe_encoder(history_batch[teacher_samples:])
+            with torch.no_grad():
+                teacher_latent = self.model.teacher_encoder(privileged_obs_batch[teacher_samples:])
+            latent_loss = (teacher_latent - student_latent).pow(2).mean()
+
+            # Load balance loss
+            mean_usage = torch.mean(gating_weights, dim=0)
+            target_usage = torch.full_like(mean_usage, 1.0 / gating_weights.shape[1])
+            load_balance_loss = torch.mean((mean_usage - target_usage).pow(2))
+            # load_balance_loss = torch.sum(mean_usage.pow(2)) * gating_weights.shape[1]  # Switch Transformer style
+
+            student_loss = latent_loss + self.load_balance_coef * load_balance_loss
+
+            self.optimizer2.zero_grad()
+            student_loss.backward()
+            nn.utils.clip_grad_norm_(self.model.student_moe_encoder.parameters(), self.max_grad_norm)
+            self.optimizer2.step()
+
+            mean_latent_loss += latent_loss.item()
+            mean_load_balance_loss += load_balance_loss.item()
+
+        num_updates = self.num_learning_epochs * self.num_mini_batches
+        mean_value_loss /= num_updates
+        mean_surrogate_loss /= num_updates
+        mean_entropy_loss /= num_updates
+        mean_latent_loss /= num_updates
+        mean_load_balance_loss /= num_updates
+        self.storage.clear()
+
+        return mean_value_loss, mean_surrogate_loss, mean_entropy_loss, mean_latent_loss, mean_load_balance_loss

rsl_rl/rsl_rl/modules/__init__.py

@@ -35,3 +35,4 @@ from .actor_critic_moe_cts import ActorCriticMoECTS
 from .actor_critic_mcp_cts import ActorCriticMCPCTS
 from .actor_critic_ac_moe_cts import ActorCriticACMoECTS
 from .actor_critic_dual_moe_cts import ActorCriticDualMoECTS
+from .actor_critic_rem_cts import ActorCriticREMCTS

rsl_rl/rsl_rl/modules/actor_critic_rem_cts.py

@@ -0,0 +1,141 @@
+# -*- coding: utf-8 -*-
+'''
+@File    : actor_critic_moe_cts.py
+@Time    : 2025/12/30 21:06:46
+@Author  : wty-yy
+@Version : 1.0
+@Blog    : https://wty-yy.github.io/
+@Desc    : Mixture of Experts Concurrent Teacher Student Network
+@Refer   : CTS https://arxiv.org/abs/2405.10830, Switch Transformers https://arxiv.org/abs/2101.03961
+'''
+import numpy as np
+
+import torch
+import torch.nn as nn
+import torch.nn.functional as F
+from torch.distributions import Normal
+
+from rsl_rl.modules.utils import L2Norm, SimNorm, StudentMoEEncoder, MLP
+
+class ActorCriticREMCTS(nn.Module):
+    is_recurrent = False
+    def __init__(self,  num_obs,
+                        num_critic_obs,
+                        num_actions,
+                        num_envs,
+                        history_length,
+                        actor_hidden_dims=[512, 256, 128],
+                        critic_hidden_dims=[512, 256, 128],
+                        teacher_encoder_hidden_dims=[512, 256],
+                        student_encoder_hidden_dims=[512, 256, 128],
+                        expert_num=8,
+                        activation='elu',
+                        init_noise_std=1.0,
+                        latent_dim=32,
+                        norm_type='l2norm',
+                        **kwargs):
+        if kwargs:
+            print("ActorCritic.__init__ got unexpected arguments, which will be ignored: " + str([key for key in kwargs.keys()]))
+        assert norm_type in ['l2norm', 'simnorm'], f"Normalization type {norm_type} not supported!"
+        super().__init__()
+        self.num_actions = num_actions
+        self.history_length = history_length
+
+        mlp_input_dim_t = num_critic_obs
+        mlp_input_dim_s = num_obs * history_length
+        mlp_input_dim_a = latent_dim + num_obs
+        mlp_input_dim_c = latent_dim + num_critic_obs
+
+        # History
+        self.register_buffer("history", torch.zeros((num_envs, history_length, num_obs)), persistent=False)
+
+        # Teacher encoder
+        self.teacher_encoder = nn.Sequential(
+            MLP([mlp_input_dim_t, *teacher_encoder_hidden_dims, latent_dim], activation=activation),
+            L2Norm() if norm_type == 'l2norm' else SimNorm()
+        )
+
+        # Student MoE encoder
+        self.student_moe_encoder = StudentMoEEncoder(
+            expert_num=expert_num,
+            input_dim=mlp_input_dim_s,
+            hidden_dims=student_encoder_hidden_dims,
+            output_dim=latent_dim,
+            activation=activation,
+            norm_type=norm_type,
+        )
+
+        # Policy
+        self.actor = MLP([mlp_input_dim_a, *actor_hidden_dims, num_actions], activation=activation)
+
+        # Value function
+        self.critic = MLP([mlp_input_dim_c, *critic_hidden_dims, 1], activation=activation)
+
+        print(f"Actor MLP: {self.actor}")
+        print(f"Critic MLP: {self.critic}")
+        print(f"Teacher Encoder: {self.teacher_encoder}")
+        print(f"Student MoE Encoder: {self.student_moe_encoder}")
+
+        # Action noise
+        self.std = nn.Parameter(init_noise_std * torch.ones(num_actions))
+        self.distribution = None
+        # disable args validation for speedup
+        Normal.set_default_validate_args = False
+
+    @staticmethod
+    # not used at the moment
+    def init_weights(sequential, scales):
+        [torch.nn.init.orthogonal_(module.weight, gain=scales[idx]) for idx, module in
+         enumerate(mod for mod in sequential if isinstance(mod, nn.Linear))]
+
+
+    def reset(self, dones=None):
+        self.history[dones > 0] = 0.0
+
+    def forward(self):
+        raise NotImplementedError
+    
+    @property
+    def action_mean(self):
+        return self.distribution.mean
+
+    @property
+    def action_std(self):
+        return self.distribution.stddev
+    
+    @property
+    def entropy(self):
+        return self.distribution.entropy().sum(dim=-1)
+
+    def update_distribution(self, latent_and_obs):
+        mean = self.actor(latent_and_obs)
+        self.distribution = Normal(mean, mean*0. + self.std)
+    
+    def act(self, obs, privileged_obs, history, is_teacher, **kwargs):
+        if is_teacher:
+            latent = self.teacher_encoder(privileged_obs)
+        else:
+            with torch.no_grad():
+                latent, _ = self.student_moe_encoder(history)
+        x = torch.cat([latent, obs], dim=1)
+        self.update_distribution(x)
+        return self.distribution.sample()
+    
+    def get_actions_log_prob(self, actions):
+        return self.distribution.log_prob(actions).sum(dim=-1)
+
+    def act_inference(self, obs):
+        self.history = torch.cat([self.history[:, 1:], obs.unsqueeze(1)], dim=1)
+        latent, _ = self.student_moe_encoder(self.history.flatten(1))
+        x = torch.cat([latent, obs], dim=1)
+        actions_mean = self.actor(x)
+        return actions_mean
+
+    def evaluate(self, privileged_obs, history, is_teacher, **kwargs):
+        if is_teacher:
+            latent = self.teacher_encoder(privileged_obs)
+        else:
+            latent, _ = self.student_moe_encoder(history)
+        x = torch.cat([latent.detach(), privileged_obs], dim=1)
+        value = self.critic(x)
+        return value

rsl_rl/rsl_rl/runners/on_policy_runner_cts.py

@@ -36,8 +36,8 @@ import statistics
 from torch.utils.tensorboard import SummaryWriter
 import torch
 
-from rsl_rl.algorithms import CTS, MoECTS, MCPCTS, ACMoECTS, DualMoECTS
+from rsl_rl.algorithms import CTS, MoECTS, MCPCTS, ACMoECTS, DualMoECTS, REMCTS
-from rsl_rl.modules import ActorCriticCTS, ActorCriticMoECTS, ActorCriticMCPCTS, ActorCriticACMoECTS, ActorCriticDualMoECTS
+from rsl_rl.modules import ActorCriticCTS, ActorCriticMoECTS, ActorCriticMCPCTS, ActorCriticACMoECTS, ActorCriticDualMoECTS, ActorCriticREMCTS
 from rsl_rl.env import VecEnv
 
 import yaml
@@ -79,7 +79,7 @@ class OnPolicyRunnerCTS:
             num_critic_obs = self.env.num_obs
         history_length = train_cfg["history_length"]
         actor_critic_class = eval(self.cfg["policy_class_name"])
-        model: Union[ActorCriticCTS, ActorCriticMoECTS, ActorCriticMCPCTS, ActorCriticACMoECTS, ActorCriticDualMoECTS] = actor_critic_class(
+        model: Union[ActorCriticCTS, ActorCriticMoECTS, ActorCriticMCPCTS, ActorCriticACMoECTS, ActorCriticDualMoECTS, ActorCriticREMCTS] = actor_critic_class(
             self.env.num_obs,
             num_critic_obs,
             self.env.num_actions,
@@ -87,7 +87,7 @@ class OnPolicyRunnerCTS:
             history_length,
             **self.policy_cfg).to(self.device)
         alg_class = eval(self.cfg["algorithm_class_name"])
-        self.alg: Union[CTS, MoECTS, MCPCTS, ACMoECTS, DualMoECTS] = alg_class(model, self.env.num_envs, history_length, device=self.device, **self.alg_cfg)
+        self.alg: Union[CTS, MoECTS, MCPCTS, ACMoECTS, DualMoECTS, REMCTS] = alg_class(model, self.env.num_envs, history_length, device=self.device, **self.alg_cfg)
         self.num_steps_per_env = self.cfg["num_steps_per_env"]
         self.save_interval = self.cfg["save_interval"]
 
@@ -183,7 +183,7 @@ class OnPolicyRunnerCTS:
             
             if self.cfg["algorithm_class_name"] in ["CTS", "MCPCTS"]:
                 mean_value_loss, mean_surrogate_loss, mean_entropy_loss, mean_latent_loss = self.alg.update()
-            elif self.cfg["algorithm_class_name"] in ["MoECTS", "ACMoECTS"]:
+            elif self.cfg["algorithm_class_name"] in ["MoECTS", "ACMoECTS", "REMCTS"]:
                 mean_value_loss, mean_surrogate_loss, mean_entropy_loss, mean_latent_loss, mean_load_balance_loss = self.alg.update()
             elif self.cfg["algorithm_class_name"] == "DualMoECTS":
                 mean_value_loss, mean_surrogate_loss, mean_entropy_loss, mean_latent_loss, mean_load_balance_loss, mean_actor_load_balance_loss = self.alg.update()