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Student Support Forum: 'NIntegrate-ing a Jacobian Singular Values Ratio' topicStudent Support Forum > General > Archives > "NIntegrate-ing a Jacobian Singular Values Ratio"

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James
08/27/08 03:45am

I am receiving what appears to be a large error when using NIntegrate.

I have a Jacobian Matrix for a robotic device that is a function of 2 variables, theta1 and theta2.

I have plotted SingularValueList[J][[2]]/SingularValueList[J][[1]] across certain ranges of theta1 and theta2. I received the plot I expected.

I want to then integrate this ratio across another range of theta1 and theta2. Integrate does not work (takes to long, I guess because of the complexity of the Jacobian). NIntegrate appears to work although the values obtained are incorrect. The notebook is attached, please see the second input cell.

Thank you for your help.

Attachment: Jacobian2.nb, URL: ,
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