Longitude control command issue

[ScottDeng114514]

System information

• OS Platform and Distribution (e.g., Linux Ubuntu 18.04): Linux Ubuntu 20.04
• Apollo installed from (source or binary): source
• Apollo version (3.5, 5.0, 5.5, 6.0): 9.0.0
• Output of apollo.sh config if on master branch: [INFO] Configure .apollo.bazelrc in non-interactive mode [INFO] You have bazel 5.2.0 installed. [INFO] Found possible Python library paths: /usr/local/lib/python3.6/dist-packages /usr/lib/python3/dist-packages [INFO] Found CUDA 11.8 in: /usr/local/cuda-11.8/targets/x86_64-linux/lib /usr/local/cuda-11.8/targets/x86_64-linux/include [INFO] Found cuDNN 8 in: /usr/lib/x86_64-linux-gnu /usr/include [INFO] Found TensorRT 8 in: /usr/lib/x86_64-linux-gnu /usr/include/x86_64-linux-gnu [ OK ] Successfully configured .apollo.bazelrc in non-interactive mode.

Steps to reproduce the issue:

• Please use bullet points and include as much details as possible:
• I'm using the VTD as the scenario provider to test control component of apollo 9.0
• The lat_controller works perfect but the lon_controller works strange
• When the car hit the target speed, control will continuously and alternately give a certain throttle and brake at a high frequency

Supporting materials (screenshots, command lines, code/script snippets):