Why does using an ideal torque sensor on differential of the 4WD Vehicle Model Example affect the simulation?

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Kishan Makwana 2017-11-18

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https://ww2.mathworks.cn/matlabcentral/answers/367842-why-does-using-an-ideal-torque-sensor-on-differential-of-the-4wd-vehicle-model-example-affect-the-si

关闭： MATLAB Answer Bot 2021-8-20

By adding in an extra ideal torque sensor to the differential of the vehicle model, it changes the output velocity: I thought if the sensor is ideal, it doesn't affect the model, simply relaying the input signal to an output scope.

I have attached both velocity scope outputs when the torque sensor and scope have & haven't been commented out to demonstrate the difference.

Can anyone please correct any flaws in my logic but also show how I could measure the torque on the differential without changing the velocity output.