Papers by Keyword: Bode Plot

Abstract: This paper proposes to use Routh-Hurwitz stability criterion for analysis and design of the operational amplifier stability; this can lead to explicit stability condition derivation for operational amplifier circuit parameters, and this is very effective to understand which parameter values should be increased or decreased for the operational amplifier stability. The proposed method has been verified by three amplifiers with theoretical analysis and SPICE simulations for three operational amplifier examples.

Abstract: In the present paper is presented a numerical simulation of an electro-hydro-mechanical system of adaptive transmission of mechanical power. This system is based on a hydraulic circuit consists of a hydraulic pump with constant flow and a hydraulic motor with variable flow ordered so that the pressure in the circuit to remain constant. For a variation of the ramp and step signal sources of loads, are presented the main features of operation of adaptive transmission. Analysis of dynamic stability of mechanical transmission is made through the linear analysis with Bode diagrams. Simulation of transmission operation is performed with AMESim.

Abstract: The stability of interface between bond cement and tubular steel is very important to the integrality of oil and gas wells. However, research on the degradation of the interface in aggressive solution is absent to date. This work devotes to discover the relationship of electrochemical parameters and interfacial development during early stage of corrosion by analyzing the electrochemical results. Dielectric spectroscopy obviously describes the stability change of passive film of steel, and Bode plot supports the structure change of cement. The early stage of immersion in aggressive solution is dominated by competition of hydratation and corrosion.

Abstract: This research is to extend Ziegler-Nichols based PID controller design method to the intelligent fuzzy PID controller design of a Scanning Probe Microscope (SPM) system, thus the relative stability can be reserved. In addition, one can see the hysteresis and parameters variation effects of the force actuator can be reduced. This improvement had been verified by practical implementation. Comparing the results with the design with the Ziegler-Nichols based PID controller, one can see that the proposed system is more robust.