How to convert hardSigmoid

Hi, I saw that the hard_sigmoid operator is supported in the document “Neural Network Layer and Operation Support Guide (02)(ref.v1.17-20200623).pdf” in aml_npu_sdk6.4.4.3, but I didn’t find it from caffe, tensorflow, tflite , Onnx, darknet and keras model conversion corresponding operators, I tried to use the onnx model conversion, an error was reported, is there any way to convert the hard_sigmoid operator?

I Try match HardSigmoid_HardSigmoid_2:out0
W Not match tensor HardSigmoid_HardSigmoid_2:out0 
Traceback (most recent call last):
  File "", line 56, in <module>
  File "", line 45, in main
  File "acuitylib/", line 139, in load_onnx
  File "acuitylib/app/importer/", line 124, in run
  File "acuitylib/converter/", line 953, in match_paragraph_and_param
  File "acuitylib/converter/", line 856, in _onnx_push_ready_tensor
TypeError: 'NoneType' object is not iterable
[1349490] Failed to execute script convertonnx