Arbitrary function generator for APS injector synchrotron correction magnets

Abstract This study deals with the design and dynamic analysis of a ramp-roller clutch which can be utilized in developing a mechanical function generator. The dynamic behavior with non-linear torsional spring and damping characteristics is first investigated. Three major design parameters are identified and further optimized for the objective of minimizing the settling time. As a result of underdamping, undesired vibration can occur during the engagement. In order to minimize these unwanted vibrations, coulomb dampers are considered. By adding a properly tuned auxiliary damper, the settling time can be significantly reduced. An example is also given to illustrate the use of one-directional clutches for mechanical function generation where an arbitrary function is synthesized by sequentially triggering 7 clutches. Phase shifting is incorporated in the to reduce the error in the generated function.

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Supercapacitor fractional model − DAQ-based measurements of frequency characteristics and error computation

ITM Web of Conferences ◽

10.1051/itmconf/20192801027 ◽

2019 ◽

Vol 28 ◽

pp. 01027 ◽

Cited By ~ 2

Author(s):

Marcin Sowa ◽

Agnieszka Jakubowska-Ciszek

Keyword(s):

Parameter Estimation ◽

Data Acquisition ◽

Arbitrary Function ◽

Estimation Procedure ◽

Frequency Characteristics ◽

Function Generator ◽

Parameter Estimation Procedure ◽

Measurement Results ◽

Measurement Basis ◽

Error Computation

The study concerns the modelling of a supercapacitor. The frequency characteristics are selected as the measurement basis for the study. The characteristics are obtained through a measurement setup featuring a data acquisition (DAQ) device and an arbitrary function generator (AFG). After the characteristics had been obtained − a parameter estimation procedure is executed. The response of the model is then compared with the measurement results. An error definition determining the agreement of the frequency characteristics is introduced. It takes into account both the real and imaginary parts of the obtained impedances.

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