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Analysis of Optimalizing Control Systems witb Special Reference to Noise Interference Effects


Serdengecti, Sedat (1955) Analysis of Optimalizing Control Systems witb Special Reference to Noise Interference Effects. Dissertation (Ph.D.), California Institute of Technology. doi:10.7907/TMXZ-AJ80.


The optimalizing control system is designed to search out automatically the optimum state of operation of the controlled system and to confine the operation to a region near this optimum state. The performance of the system is affected by the dynamics of the controlled system and by the noise interference. The dynamic effects of the controlled system on the performance of a peak-holding optimalizing control is analyzed under the assumption that the controlled system dynamics may be represented by a first order input linear group and a first order output linear group. Design charts are constructed for determining the required input drive speed and consequent hunting loss with specified time constants of the input and output linear groups, the hunting period, and the critical indicated difference for input drive reversal. The noise interference effects on the control system performance led to a new type of optimalizing control system which is a modification of the peak-holding optimalizing controller. Performance of the modified optimalizing controller is analyzed and several possible procedures are discussed for detecting and eliminating the incorrect operation modes. A statistical analysis is made to demonstrate the efficiency of a typical detection procedure, namely, the method of filtering through cross-correlation. The modified optimalizing controller can utilize any periodically varying input. An example of this, a sinusoidal input controller, is analyzed to show the dynamic effects of the controlled system and to demonstrate the effect of noise interference on the performance of the modified optimalizing controller.

Item Type:Thesis (Dissertation (Ph.D.))
Subject Keywords:(Mechanical Engineering and Mathematics)
Degree Grantor:California Institute of Technology
Division:Engineering and Applied Science
Major Option:Mechanical Engineering
Minor Option:Mathematics
Thesis Availability:Public (worldwide access)
Research Advisor(s):
  • Tsien, Hsue Shen (advisor)
  • Marble, Frank E. (advisor)
Thesis Committee:
  • Unknown, Unknown
Defense Date:1 January 1955
Record Number:CaltechETD:etd-12112003-090547
Persistent URL:
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:4939
Deposited By: Imported from ETD-db
Deposited On:15 Dec 2003
Last Modified:06 Jul 2023 20:59

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PDF (Serdengecti_s_1955.pdf) - Final Version
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