000			020500000a22002770004500
003			EG-GICUC
008			060917s2006 ua a f m 000 0 eng d
040			_aEG-GICUC _beng _cEG-GICUC
041	0		_aEng
049			_aDeposite
097			_aM.Sc
099			_aCai01.13.05.M.Sc.2006.Eh.C.
100	0		_aEhab Ahmed Mahmoud
245	1	0	_aControlling strain controlled test by fuzzy logic / _cEhab Ahmed Mahmoud , Supervised Mostafa Abd El Hameed abuKiefa , Ahmed Essa Husien
260			_aCairo : _bEhab Ahmed Mahmoud , _c2006
300			_a125p : _bill ; _c30cm
502			_aThesis (M.Sc.) - Cairo University - Faculty Of Engineering - Department Of Civil Engineering
520			_aCyclic Triaxial Test is used to study the stress - deformation behavior of the soilYoung's modulus , E and the damping ratio , are measured in cyclic triaxial test when strain - controlled test is conductedIn this test , control system is used to apply cycles of controlled deformationCurrently , the classical PID (Proportional , Integral and Derivative) control is widely used where its gains are manually tunedThe problem with this type of control is in the PID gains which differ from one test to another depending on the tested soilThe PID controllers also exhibit poor performance with the highly nonlinear systemsGenerally , tuning the Proportional , Integral , and Derivative constants are time consuming and require high experience In this research , a fuzzy controller technique is used to develop a new control system for strain - controlled testMATLAB software is used for developing and evaluating the performance of the proposed control system in case of cyclic loadingThe proposed control system shows its superiority over the PID controller especially for the highly nonlinear soil behavior
530			_aIssued also as CD
653		4	_afuzzy logic
700	0		_aAhmed Essa Husien , _esupervisor
700	0		_aMostafa Abd El Hameed abuKiefa , _eSupervisor
905			_aEsam _eRevisor
905			_aHala _eCataloger
942			_2ddc _cTH
999			_c31111 _d31111