diff --git a/README.md b/README.md
index 45c4da2..7c7bb97 100644
--- a/README.md
+++ b/README.md
@@ -57,14 +57,7 @@ sudo ldconfig
 
 ## Compilation
 
-Customize the following two functions in your code to adapt to different models:
-
-```cpp
-torch::Tensor forward() override;
-torch::Tensor compute_observation() override;
-```
-
-Then compile in the root directory
+Compile in the root directory of the project
 
 ```bash
 cd ..
@@ -142,8 +135,9 @@ In the following text, `<ROBOT>` represents the name of the robot
 1. Create a model package named `<ROBOT>_description` in the `rl_sar/src/robots` directory. Place the robot's URDF file in the `rl_sar/src/robots/<ROBOT>_description/urdf` directory and name it `<ROBOT>.urdf`. Additionally, create a joint configuration file with the namespace `<ROBOT>_gazebo` in the `rl_sar/src/robots/<ROBOT>_description/config` directory.
 2. Place the trained RL model files in the `rl_sar/src/rl_sar/models/<ROBOT>` directory.
 3. In the `rl_sar/src/rl_sar/models/<ROBOT>` directory, create a `config.yaml` file, and modify its parameters based on the `rl_sar/src/rl_sar/models/a1_isaacgym/config.yaml` file.
-4. If you need to run simulations, modify the launch files as needed by referring to those in the `rl_sar/src/rl_sar/launch` directory.
-5. If you need to run on the physical robot, modify the file `rl_sar/src/rl_sar/src/rl_real_a1.cpp` as needed.
+4. Modify the `forward()` function in the code as needed to adapt to different models.
+5. If you need to run simulations, modify the launch files as needed by referring to those in the `rl_sar/src/rl_sar/launch` directory.
+6. If you need to run on the physical robot, modify the file `rl_sar/src/rl_sar/src/rl_real_a1.cpp` as needed.
 
 ## Reference
 
diff --git a/README_CN.md b/README_CN.md
index 4a7f1e6..5d92c70 100644
--- a/README_CN.md
+++ b/README_CN.md
@@ -57,14 +57,7 @@ sudo ldconfig
 
 ## 编译
 
-自定义代码中的以下两个函数，以适配不同的模型：
-
-```cpp
-torch::Tensor forward() override;
-torch::Tensor compute_observation() override;
-```
-
-然后到根目录编译
+在项目根目录编译
 
 ```bash
 cd ..
@@ -143,8 +136,9 @@ rosrun rl_sar rl_real_a1
 1. 在`rl_sar/src/robots`路径下创建名为`<ROBOT>_description`的模型包，将模型的urdf放到`rl_sar/src/robots/<ROBOT>_description/urdf`路径下并命名为`<ROBOT>.urdf`，并在`rl_sar/src/robots/<ROBOT>_description/config`路径下创建命名空间为`<ROBOT>_gazebo`的关节配置文件
 2. 将训练好的RL模型文件放到`rl_sar/src/rl_sar/models/<ROBOT>`路径下
 3. 在`rl_sar/src/rl_sar/models/<ROBOT>`中新建config.yaml文件，参考`rl_sar/src/rl_sar/models/a1_isaacgym/config.yaml`文件修改其中参数
-4. 若需要运行仿真，则参考`rl_sar/src/rl_sar/launch`路径下的launch文件自行修改
-5. 若需要运行实物，则参考`rl_sar/src/rl_sar/src/rl_real_a1.cpp`文件自行修改
+4. 按需修改代码中的`forward()`函数，以适配不同的模型
+5. 若需要运行仿真，则参考`rl_sar/src/rl_sar/launch`路径下的launch文件自行修改
+6. 若需要运行实物，则参考`rl_sar/src/rl_sar/src/rl_real_a1.cpp`文件自行修改
 
 ## 参考
 
diff --git a/src/rl_sar/include/rl_real_a1.hpp b/src/rl_sar/include/rl_real_a1.hpp
index c330b21..f60218e 100644
--- a/src/rl_sar/include/rl_real_a1.hpp
+++ b/src/rl_sar/include/rl_real_a1.hpp
@@ -19,7 +19,6 @@ class RL_Real : public RL
 private:
     // rl functions
     torch::Tensor Forward() override;
-    torch::Tensor ComputeObservation() override;
     void GetState(RobotState<double> *state) override;
     void SetCommand(const RobotCommand<double> *command) override;
     void RunModel();
diff --git a/src/rl_sar/include/rl_sim.hpp b/src/rl_sar/include/rl_sim.hpp
index 2477b88..da0c6f3 100644
--- a/src/rl_sar/include/rl_sim.hpp
+++ b/src/rl_sar/include/rl_sim.hpp
@@ -24,7 +24,6 @@ class RL_Sim : public RL
 private:
     // rl functions
     torch::Tensor Forward() override;
-    torch::Tensor ComputeObservation() override;
     void GetState(RobotState<double> *state) override;
     void SetCommand(const RobotCommand<double> *command) override;
     void RunModel();
diff --git a/src/rl_sar/library/rl_sdk/rl_sdk.cpp b/src/rl_sar/library/rl_sdk/rl_sdk.cpp
index 30ad610..78a9bd8 100644
--- a/src/rl_sar/library/rl_sdk/rl_sdk.cpp
+++ b/src/rl_sar/library/rl_sdk/rl_sdk.cpp
@@ -1,21 +1,5 @@
 #include "rl_sdk.hpp"
 
-/* You may need to override this ComputeObservation() function
-torch::Tensor RL_XXX::ComputeObservation()
-{
-    torch::Tensor obs = torch::cat({
-        this->QuatRotateInverse(this->obs.base_quat, this->obs.ang_vel, this->params.framework) * this->params.ang_vel_scale,
-        this->QuatRotateInverse(this->obs.base_quat, this->obs.gravity_vec, this->params.framework),
-        this->obs.commands * this->params.commands_scale,
-        (this->obs.dof_pos - this->params.default_dof_pos) * this->params.dof_pos_scale,
-        this->obs.dof_vel * this->params.dof_vel_scale,
-        this->obs.actions
-        },1);
-    torch::Tensor clamped_obs = torch::clamp(obs, -this->params.clip_obs, this->params.clip_obs);
-    return clamped_obs;
-}
-*/
-
 /* You may need to override this Forward() function
 torch::Tensor RL_XXX::Forward()
 {
@@ -27,6 +11,48 @@ torch::Tensor RL_XXX::Forward()
 }
 */
 
+torch::Tensor RL::ComputeObservation()
+{
+    std::vector<torch::Tensor> obs_list;
+
+    for(const std::string& observation : this->params.observations)
+    {
+        if(observation == "lin_vel")
+        {
+            obs_list.push_back(this->obs.lin_vel * this->params.lin_vel_scale);
+        }
+        else if(observation == "ang_vel")
+        {
+            // obs_list.push_back(this->obs.ang_vel * this->params.ang_vel_scale); // TODO is QuatRotateInverse necessery?
+            obs_list.push_back(this->QuatRotateInverse(this->obs.base_quat, this->obs.ang_vel, this->params.framework) * this->params.ang_vel_scale);
+        }
+        else if(observation == "gravity_vec")
+        {
+            obs_list.push_back(this->QuatRotateInverse(this->obs.base_quat, this->obs.gravity_vec, this->params.framework));
+        }
+        else if(observation == "commands")
+        {
+            obs_list.push_back(this->obs.commands * this->params.commands_scale);
+        }
+        else if(observation == "dof_pos")
+        {
+            obs_list.push_back((this->obs.dof_pos - this->params.default_dof_pos) * this->params.dof_pos_scale);
+        }
+        else if(observation == "dof_vel")
+        {
+            obs_list.push_back(this->obs.dof_vel * this->params.dof_vel_scale);
+        }
+        else if(observation == "actions")
+        {
+            obs_list.push_back(this->obs.actions);
+        }
+    }
+
+    torch::Tensor obs = torch::cat(obs_list, 1);
+    torch::Tensor clamped_obs = torch::clamp(obs, -this->params.clip_obs, this->params.clip_obs);
+    return clamped_obs;
+}
+
 void RL::InitObservations()
 {
     this->obs.lin_vel = torch::tensor({{0.0, 0.0, 0.0}});
@@ -369,6 +395,7 @@ void RL::ReadYaml(std::string robot_name)
     this->params.dt = config["dt"].as<double>();
     this->params.decimation = config["decimation"].as<int>();
     this->params.num_observations = config["num_observations"].as<int>();
+    this->params.observations = ReadVectorFromYaml<std::string>(config["observations"]);
     this->params.clip_obs = config["clip_obs"].as<double>();
     this->params.clip_actions_upper = torch::tensor(ReadVectorFromYaml<double>(config["clip_actions_upper"], this->params.framework, rows, cols)).view({1, -1});
     this->params.clip_actions_lower = torch::tensor(ReadVectorFromYaml<double>(config["clip_actions_lower"], this->params.framework, rows, cols)).view({1, -1});
diff --git a/src/rl_sar/library/rl_sdk/rl_sdk.hpp b/src/rl_sar/library/rl_sdk/rl_sdk.hpp
index e861eb2..703770b 100644
--- a/src/rl_sar/library/rl_sdk/rl_sdk.hpp
+++ b/src/rl_sar/library/rl_sdk/rl_sdk.hpp
@@ -74,6 +74,7 @@ struct ModelParams
     double dt;
     int decimation;
     int num_observations;
+    std::vector<std::string> observations;
     double damping;
     double stiffness;
     double action_scale;
@@ -128,7 +129,7 @@ class RL
 
     // rl functions
     virtual torch::Tensor Forward() = 0;
-    virtual torch::Tensor ComputeObservation() = 0;
+    torch::Tensor ComputeObservation();
     virtual void GetState(RobotState<double> *state) = 0;
     virtual void SetCommand(const RobotCommand<double> *command) = 0;
     void StateController(const RobotState<double> *state, RobotCommand<double> *command);
diff --git a/src/rl_sar/models/a1_isaacgym/config.yaml b/src/rl_sar/models/a1_isaacgym/config.yaml
index 0f11b42..1462540 100644
--- a/src/rl_sar/models/a1_isaacgym/config.yaml
+++ b/src/rl_sar/models/a1_isaacgym/config.yaml
@@ -7,6 +7,7 @@ a1_isaacgym:
   dt: 0.005
   decimation: 4
   num_observations: 45
+  observations: ["ang_vel", "gravity_vec", "commands", "dof_pos", "dof_vel", "actions"]
   clip_obs: 100.0
   clip_actions_lower: [-100, -100, -100, 
                        -100, -100, -100, 
diff --git a/src/rl_sar/models/a1_isaacsim/config.yaml b/src/rl_sar/models/a1_isaacsim/config.yaml
index 2c5f3d8..845bbdd 100644
--- a/src/rl_sar/models/a1_isaacsim/config.yaml
+++ b/src/rl_sar/models/a1_isaacsim/config.yaml
@@ -7,6 +7,7 @@ a1_isaacsim:
   dt: 0.005
   decimation: 4
   num_observations: 45
+  observations: ["ang_vel", "gravity_vec", "commands", "dof_pos", "dof_vel", "actions"]
   clip_obs: 100.0
   clip_actions_lower: [-100, -100, -100, 
                        -100, -100, -100, 
diff --git a/src/rl_sar/models/gr1t1_isaacgym/config.yaml b/src/rl_sar/models/gr1t1_isaacgym/config.yaml
index 7062f4d..c6a7a65 100644
--- a/src/rl_sar/models/gr1t1_isaacgym/config.yaml
+++ b/src/rl_sar/models/gr1t1_isaacgym/config.yaml
@@ -7,6 +7,7 @@ gr1t1_isaacgym:
   dt: 0.001
   decimation: 20
   num_observations: 39
+  observations: ["ang_vel", "gravity_vec", "commands", "dof_pos", "dof_vel", "actions"]
   clip_obs: 100.0
   clip_actions_lower: [-0.4391, -1.0491, -2.0991, -0.4391, -1.3991,
                        -1.1391, -1.0491, -2.0991, -0.4391, -1.3991]
diff --git a/src/rl_sar/models/gr1t1_isaacsim/config.yaml b/src/rl_sar/models/gr1t1_isaacsim/config.yaml
index 8dc3319..f8b54a5 100644
--- a/src/rl_sar/models/gr1t1_isaacsim/config.yaml
+++ b/src/rl_sar/models/gr1t1_isaacsim/config.yaml
@@ -7,6 +7,7 @@ gr1t1_isaacsim:
   dt: 0.001
   decimation: 20
   num_observations: 39
+  observations: ["ang_vel", "gravity_vec", "commands", "dof_pos", "dof_vel", "actions"]
   clip_obs: 100.0
   clip_actions_lower: [-0.4391, -1.0491, -2.0991, -0.4391, -1.3991,
                        -1.1391, -1.0491, -2.0991, -0.4391, -1.3991]
diff --git a/src/rl_sar/models/gr1t2_isaacgym/config.yaml b/src/rl_sar/models/gr1t2_isaacgym/config.yaml
index 87bbd25..9b25700 100644
--- a/src/rl_sar/models/gr1t2_isaacgym/config.yaml
+++ b/src/rl_sar/models/gr1t2_isaacgym/config.yaml
@@ -7,6 +7,7 @@ gr1t2_isaacgym:
   dt: 0.001
   decimation: 20
   num_observations: 39
+  observations: ["ang_vel", "gravity_vec", "commands", "dof_pos", "dof_vel", "actions"]
   clip_obs: 100.0
   clip_actions_lower: [-0.4391, -1.0491, -2.0991, -0.4391, -1.3991,
                        -1.1391, -1.0491, -2.0991, -0.4391, -1.3991]
diff --git a/src/rl_sar/models/gr1t2_isaacsim/config.yaml b/src/rl_sar/models/gr1t2_isaacsim/config.yaml
index d09a118..c8abfab 100644
--- a/src/rl_sar/models/gr1t2_isaacsim/config.yaml
+++ b/src/rl_sar/models/gr1t2_isaacsim/config.yaml
@@ -7,6 +7,7 @@ gr1t2_isaacsim:
   dt: 0.001
   decimation: 20
   num_observations: 39
+  observations: ["ang_vel", "gravity_vec", "commands", "dof_pos", "dof_vel", "actions"]
   clip_obs: 100.0
   clip_actions_lower: [-0.4391, -1.0491, -2.0991, -0.4391, -1.3991,
                        -1.1391, -1.0491, -2.0991, -0.4391, -1.3991]
diff --git a/src/rl_sar/scripts/rl_sdk.py b/src/rl_sar/scripts/rl_sdk.py
index 5cdbc4b..69556b5 100644
--- a/src/rl_sar/scripts/rl_sdk.py
+++ b/src/rl_sar/scripts/rl_sdk.py
@@ -68,6 +68,7 @@ def __init__(self):
         self.dt = None
         self.decimation = None
         self.num_observations = None
+        self.observations = None
         self.damping = None
         self.stiffness = None
         self.action_scale = None
@@ -134,6 +135,28 @@ def __init__(self):
         self.output_torques = torch.zeros(1, 32)
         self.output_dof_pos = torch.zeros(1, 32)
 
+    def ComputeObservation(self):
+        obs_list = []
+        for observation in self.params.observations:
+            if observation == "lin_vel":
+                obs_list.append(self.obs.lin_vel * self.params.lin_vel_scale)
+            elif observation == "ang_vel":
+                # obs_list.append(self.obs.ang_vel * self.params.ang_vel_scale) # TODO is QuatRotateInverse necessery?
+                obs_list.append(self.QuatRotateInverse(self.obs.base_quat, self.obs.ang_vel, self.params.framework) * self.params.ang_vel_scale)
+            elif observation == "gravity_vec":
+                obs_list.append(self.QuatRotateInverse(self.obs.base_quat, self.obs.gravity_vec, self.params.framework))
+            elif observation == "commands":
+                obs_list.append(self.obs.commands * self.params.commands_scale)
+            elif observation == "dof_pos":
+                obs_list.append((self.obs.dof_pos - self.params.default_dof_pos) * self.params.dof_pos_scale)
+            elif observation == "dof_vel":
+                obs_list.append(self.obs.dof_vel * self.params.dof_vel_scale)
+            elif observation == "actions":
+                obs_list.append(self.obs.actions)
+        obs = torch.cat(obs_list, dim=-1)
+        clamped_obs = torch.clamp(obs, -self.params.clip_obs, self.params.clip_obs)
+        return clamped_obs
+    
     def InitObservations(self):
         self.obs.lin_vel = torch.zeros(1, 3, dtype=torch.float)
         self.obs.ang_vel = torch.zeros(1, 3, dtype=torch.float)
@@ -359,6 +382,7 @@ def ReadYaml(self, robot_name):
         self.params.dt = config["dt"]
         self.params.decimation = config["decimation"]
         self.params.num_observations = config["num_observations"]
+        self.params.observations = config["observations"]
         self.params.clip_obs = config["clip_obs"]
         self.params.action_scale = config["action_scale"]
         self.params.hip_scale_reduction = config["hip_scale_reduction"]
diff --git a/src/rl_sar/scripts/rl_sim.py b/src/rl_sar/scripts/rl_sim.py
index b7fd821..f9fde79 100644
--- a/src/rl_sar/scripts/rl_sim.py
+++ b/src/rl_sar/scripts/rl_sim.py
@@ -173,7 +173,7 @@ def JointStatesCallback(self, msg):
 
     def RunModel(self):
         if self.running_state == STATE.STATE_RL_RUNNING and self.simulation_running:
-            # self.obs.lin_vel = torch.tensor([[self.vel.linear.x, self.vel.linear.y, self.vel.linear.z]])
+            self.obs.lin_vel = torch.tensor([[self.vel.linear.x, self.vel.linear.y, self.vel.linear.z]])
             self.obs.ang_vel = torch.tensor(self.robot_state.imu.gyroscope).unsqueeze(0)
             # self.obs.commands = torch.tensor([[self.cmd_vel.linear.x, self.cmd_vel.linear.y, self.cmd_vel.angular.z]])
             self.obs.commands = torch.tensor([[self.control.x, self.control.y, self.control.yaw]])
@@ -199,20 +199,6 @@ def RunModel(self):
                 tau_est = torch.tensor(self.mapped_joint_efforts).unsqueeze(0)
                 self.CSVLogger(self.output_torques, tau_est, self.obs.dof_pos, self.output_dof_pos, self.obs.dof_vel)
 
-    def ComputeObservation(self):
-        obs = torch.cat([
-            # self.obs.lin_vel * self.params.lin_vel_scale,
-            # self.obs.ang_vel * self.params.ang_vel_scale, # TODO is QuatRotateInverse necessery?
-            self.QuatRotateInverse(self.obs.base_quat, self.obs.ang_vel, self.params.framework) * self.params.ang_vel_scale,
-            self.QuatRotateInverse(self.obs.base_quat, self.obs.gravity_vec, self.params.framework),
-            self.obs.commands * self.params.commands_scale,
-            (self.obs.dof_pos - self.params.default_dof_pos) * self.params.dof_pos_scale,
-            self.obs.dof_vel * self.params.dof_vel_scale,
-            self.obs.actions
-        ], dim = -1)
-        clamped_obs = torch.clamp(obs, -self.params.clip_obs, self.params.clip_obs)
-        return clamped_obs
-
     def Forward(self):
         torch.set_grad_enabled(False)
         clamped_obs = self.ComputeObservation()
diff --git a/src/rl_sar/src/rl_real_a1.cpp b/src/rl_sar/src/rl_real_a1.cpp
index 479ef4e..4a9f98f 100644
--- a/src/rl_sar/src/rl_real_a1.cpp
+++ b/src/rl_sar/src/rl_real_a1.cpp
@@ -170,21 +170,6 @@ void RL_Real::RunModel()
     }
 }
 
-torch::Tensor RL_Real::ComputeObservation()
-{
-    torch::Tensor obs = torch::cat({
-        // this->QuatRotateInverse(this->obs.base_quat, this->obs.lin_vel) * this->params.lin_vel_scale,
-        this->QuatRotateInverse(this->obs.base_quat, this->obs.ang_vel, this->params.framework) * this->params.ang_vel_scale,
-        this->QuatRotateInverse(this->obs.base_quat, this->obs.gravity_vec, this->params.framework),
-        this->obs.commands * this->params.commands_scale,
-        (this->obs.dof_pos - this->params.default_dof_pos) * this->params.dof_pos_scale,
-        this->obs.dof_vel * this->params.dof_vel_scale,
-        this->obs.actions
-        },1);
-    torch::Tensor clamped_obs = torch::clamp(obs, -this->params.clip_obs, this->params.clip_obs);
-    return clamped_obs;
-}
-
 torch::Tensor RL_Real::Forward()
 {
     torch::autograd::GradMode::set_enabled(false);
diff --git a/src/rl_sar/src/rl_sim.cpp b/src/rl_sar/src/rl_sim.cpp
index 2bfee62..fd3ea09 100644
--- a/src/rl_sar/src/rl_sim.cpp
+++ b/src/rl_sar/src/rl_sim.cpp
@@ -212,7 +212,7 @@ void RL_Sim::RunModel()
 {
     if(this->running_state == STATE_RL_RUNNING && simulation_running)
     {
-        // this->obs.lin_vel = torch::tensor({{this->vel.linear.x, this->vel.linear.y, this->vel.linear.z}});
+        this->obs.lin_vel = torch::tensor({{this->vel.linear.x, this->vel.linear.y, this->vel.linear.z}});
         this->obs.ang_vel = torch::tensor(this->robot_state.imu.gyroscope).unsqueeze(0);
         // this->obs.commands = torch::tensor({{this->cmd_vel.linear.x, this->cmd_vel.linear.y, this->cmd_vel.angular.z}});
         this->obs.commands = torch::tensor({{this->control.x, this->control.y, this->control.yaw}});
@@ -243,22 +243,6 @@ void RL_Sim::RunModel()
     }
 }
 
-torch::Tensor RL_Sim::ComputeObservation()
-{
-    torch::Tensor obs = torch::cat({
-        // this->obs.lin_vel * this->params.lin_vel_scale,
-        // this->obs.ang_vel * this->params.ang_vel_scale, // TODO is QuatRotateInverse necessery?
-        this->QuatRotateInverse(this->obs.base_quat, this->obs.ang_vel, this->params.framework) * this->params.ang_vel_scale,
-        this->QuatRotateInverse(this->obs.base_quat, this->obs.gravity_vec, this->params.framework),
-        this->obs.commands * this->params.commands_scale,
-        (this->obs.dof_pos - this->params.default_dof_pos) * this->params.dof_pos_scale,
-        this->obs.dof_vel * this->params.dof_vel_scale,
-        this->obs.actions
-        },1);
-    torch::Tensor clamped_obs = torch::clamp(obs, -this->params.clip_obs, this->params.clip_obs);
-    return clamped_obs;
-}
-
 torch::Tensor RL_Sim::Forward()
 {
     torch::autograd::GradMode::set_enabled(false);