Nana Sutarna
@upmk.ac.id
STKIP Muhammadiyah Kuningan
Scopus Publications
Scholar Citations
Scholar h-index
Scholar i10-index
Scopus Publications
Nana Sutarna, Reza Muhamad Zaenal, and Nanan Abdul Manan
AIP Publishing
Budi Febriyanto and Nana Sutarna
IOP Publishing
Nana Sutarna
IOP Publishing
Chun-Tang Chao, Nana Sutarna, Juing-Shian Chiou, and Chi-Jo Wang
MDPI AG
This paper proposes an optimal fuzzy proportional–integral–derivative (PID) controller design based on conventional PID control and nonlinear factors. With the equivalence between fuzzy logic controllers (FLCs) and conventional PID controllers, a conventional PID controller design can be rapidly transformed into an equivalent FLC by defining the operating ranges of the input/output of the controller. The proposed nonlinear factors can further tune the nonlinearity of the membership functions (MFs) distributed in the operating ranges. In this manner, a fuzzy PID controller can be developed with less parameters and optimized by using the genetic algorithm (GA). In addition, the aforementioned equivalent FLC can act as one individual in the initial population of GA, and significantly enhances the GA efficiency. Simulation results demonstrate the feasibility of this technique. This resulted in an optimal fuzzy PID controller design with only eight parameters with a concise controller structure, and most importantly, the optimal fuzzy PID controller design is now more systematic.
Chun-Tang Chao, Nana Sutarna, Juing-Shian Chiou, and Chi-Jo Wang
MDPI AG
This paper proposes the equivalence between fuzzy Proportional-Integral-Derivative (PID) controllers and conventional PID controllers. A well-designed conventional PID controller, with the help of the proposed method, can be rapidly transformed to an equivalent fuzzy logic controller (FLC) by observing and defining the operating ranges of the input/output of the controller. Furthermore, the knowledge base of the proposed equivalent fuzzy PID controller is represented as a cube fuzzy associative memory (FAM), instead of a combination of PD-type and PI-type FLCs in most research. Simulation results show the feasibility of the proposed technique, both in continuous and discrete time. Since the design techniques of conventional linear PID controllers have matured, they can act as preliminary expert knowledge for nonlinear FLCs designs. Based on the proposed equivalence relationship, the designer can further tune the membership functions of fuzzy variables in the control rules to exhibit the nonlinearity of a FLC and yield more satisfactory system responses in an efficient way.
M. Julius, N. Sutarna, and P.S. Hadi
IEEE
A thin-film temperature sensor, comprising a metal support (12), an NTC thermistor (11) provided on one end of the metal support (12), a calendered wire (14) provided on the other end of the metal support (12), a terminal socket seat (15) provided on the other end of the calendered wire (14), a thin film (10) for covering the metal support (12) and the NTC thermistor (11) and a flexible flat cable (FFC) or a flexible printed circuit (FPC) (13) for wrapping the calendered wire (14), wherein one end of the FFC or FPC (13) is connected to the thin film (10), and the other end is connected to the terminal socket seat (15). By means of the encapsulation of a thin film, a thin-film temperature sensor has good insulating effect, good stability, high reliability and high resistance value precision and is safe to use, and meanwhile, the length of the thin-film temperature sensor can be increased at will according to requirements.