Simulink Transmission Shift Map

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MATLAB_Soldier
MATLAB_Soldier 2022-9-28
评论： Fangjun Jiang 2022-11-11
Hello,
I am trying to create a system that would decide if the vehicle needs to shift up or down based on the vehicle speed gradient, the current speed and the following shift map:
I have come up with a simple method that would use a lookup table to decide on the appropriate gear selection. However, I am not sure if this is the best way to go about it. I know that it is possible to do the whole process using StateFlow but unfortunately, it is not available for me. Therefore, I need figure out how to make it work without stateflow.
Is it possible to do it with a lookup table or do you think there is a better way to do it?

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回答（1 个）

Fangjun Jiang
Fangjun Jiang 2022-9-29
It is possible and you are almost there.
You have the logic to check whether the speed is increasing (for up shipt) or else (for down shift). You only need a 1-D lookup table block with one input, which is the vehicle speed. The vehicle speed threshold would be the index. The gear number would be the output.
You will need two 1-D lookup tables (one for up shift and one for down shift). Use a Switch block to switch the output. Or Use a Merge block (which is more efficient but requires Enabled sub-system).
  2 个评论
Beau Tucker
Beau Tucker 2022-11-11
Could you explain the values in the lookup table? Specififcally how to obtain those values? Thank you.
Fangjun Jiang
Fangjun Jiang 2022-11-11
The values for the lookup table are provided in the Original Poster's question.

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