If Block erroneous output

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Rahul 2013-1-21

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/59429-if-block-erroneous-output

关闭： MATLAB Answer Bot 2021-8-20

Refer to the image at the following link attached for understanding the question. Image: http://www5.picturepush.com/photo/a/12014483/img/12014483.jpg

There are 2 inputs: 1.Speed_Pulse 2.PreviousSpeedPulse_1_old

The second input is nothing but the first input delayed in time by 1 time instant using the unit delay block. The 'If' block compares the 2 inputs. If the input 'u1' (Speed_Pulse) is less than 'u2'(PreviousSpeedPulse_1_old) then, in the 'if action' block, the value 64 is simply added to u1 (Speed_Pulse) value. Else, the input Speed_Pulse is directly transmitted to the output via the 'else action' block. One of the outputs is transmitted to 'Temp' (depending on the 'if-else') using the 'Merge' block.

Now refer to following table of inputs and outputs. Table at this link: http://img521.imageshack.us/img521/8684/tablewy.png

The values are wrong for instant 4 and instant 7. Any idea what is going wrong?