HIi, I am trying to simulate a biped robot in gazebo, I am done till creating description files and able to launch and visualise my robot model. Problem is I am not able to control the robot.I have given all joint parameters in the control files but when it comes to the simulation nothing related to controllers shows up.

bittu@bittu-HP-Pavilion-Notebook:~/humanoid_ws$ rostopic list
/clock
/gazebo/link_states
/gazebo/model_states
/gazebo/parameter_descriptions
/gazebo/parameter_updates
/gazebo/set_link_state
/gazebo/set_model_state
/humanoid/joint_states
/rosout
/rosout_agg
/tf
/tf_static

I referred to some of the solutions in the forum but couldn't solve the problem. Can you please guide me out of this problem!!