GAIN MARGINS AND ROOT LOCUS ASYMPTOTIC-BEHAVIOR IN MULTIVARIABLE DESIGN .2. CRITICAL APPRAISAL OF FREQUENCY-RESPONSE METHODS FROM A ROOT LOCUS POINT OF VIEW
The inverse Nyquist array (INA) and characteristic locus (CL) techniques are considered here. It is shown that attempts to achieve diagonal dominance, a feature necessary for the application of the INA, may on certain occasions lead to infinite zeros of higher order and thus may severely curtail the...
| المؤلف الرئيسي: | |
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| التنسيق: | Journal article |
| منشور في: |
1978
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| الملخص: | The inverse Nyquist array (INA) and characteristic locus (CL) techniques are considered here. It is shown that attempts to achieve diagonal dominance, a feature necessary for the application of the INA, may on certain occasions lead to infinite zeros of higher order and thus may severely curtail the system gain margins. The alignment of the characteristic directions at high frequencies, used by the CL on the other hand for the reduction of the misalignment angles, is shown to have a beneficial effect on the structure of the projected Markov parameters. Insight gained by such an appraisal reinforces the belief that root locus and frequency response methods used in a complementary manner may lead to a hybrid design philosophy which is more flexible and effective than either of the two approaches applied separately. |
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