A DESCRIBING FUNCTION FOR MULTIPLE NONLINEARITY CONTROL SYSTEMS | ||||
| International Conference on Aerospace Sciences and Aviation Technology | ||||
| Article 80, Volume 1, A.S.A.T. CONFERENCE 14-16 May 1985 r CAIRO, May 1985, Page 1025-1038 PDF (1.85 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/asat.1985.26571 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
| E. E. ZAKZOK1; S. EL-NAHASS2 | ||||
| 1Dr., MTC, Ministry of Defence, Cairo, A.R.E. | ||||
| 2MS., Air Force, Ministry of Defence, Cairo, A.R.E. | ||||
| Abstract | ||||
| This paper deals with the problem of using the Describing Function (DF) technique, in the analysis of practical control systems which contain more than one nonlinear element in the control loop. The DF technique is analysed to investigate its limitation in nonlinear system design. Both single input-single output and multiple input-single output systems are considered. Computer simulation is utilized to check results. It has been shown that this technique can be used in control systems which contain only one nonlinearity and with single input applications. However, in the case of systems which have more than one nonlinearity in the control loop, it is shown that: the DF Is not an accurate method of analysis specially in the multiple input applications. | ||||
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