Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 5 of 5 for “"Nyquist stability"”.
-
Design and simulation of a torque sensing governor for an internal combustion engine
… for the real system using each governor and the Nyquist stability criteria applied. The Nyquist criteria showed the system to be stable when either governor was used. The Nyquist plots showed that the torque sensor reduced phase lag more than the derivative component of conventional control.
-
AC/DC power system small-signal impedance measurement for stability analysis
… a dc power system is small-signal stable if the Nyquist contour of product of the source impedance and load admittance satisfied the Nyquist stability criterion. Methods of extracting impedance in dc systems have been well established. However, for ac systems, the traditional current-injection …
-
Voltage Stability and Control in Autonomous Electric Power Systems with Variable Frequency
… various types of power electronic loads. The stability of these systems is a challenge due to the inherent nonlinearity of the circuits involved. Traditionally, the stability analysis in this type of power systems has been approached by means of small-signal methodology derived from the …
-
Stability Analysis of Three-Phase AC Power Systems Based on Measured D-Q Frame Impedances
Small-signal stability is of great concern for distributed power systems with a large number of regulated power converters. These converters are constant-power loads (CPLs) exhibit a negative incremental input resistance within the output voltage regulation bandwidth. In the case of dc systems, …
-
Development and experimental validation of direct controller tuning for spaceborne telescopes
… which combines the high performance and stability robustness guarantees of modem, robust-control design with the spaceflight heritage of conventional control design, is proposed which will meet the strict requirements and maintain traceability to the successful controllers from …