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Hi there Eman.m,

I can think of two reasons the vehicle could be moving slowly:

1. The vehicle controller parameter velocity limits,
2. or the teb_local planner parameters.

Try to echo the /cmd_vel topic and see what value is being sent. If the value being sent is greater than the actual velocity, the issue is the vehicle controller settings. You will probably have to edit the vehicle controller's .yaml file. If the value is equal to the vehicle speed, then the issue is the teb_local_planner parameter. You can experiment with its parameters by running rqt_reconfigure when the robot is running. Just be careful and remember velocities are in [m/s]. Start with small values when you are testing.