Adaptive pulse‐pump controller for x‐y mode frequency‐locked stepping servomechanism

Hsieh, Guan Chyun; Chen, Liang Rui; Hsieh, Kuan Lung; Wu, H.-C.; Hsu, Jui Hsing

doi:10.1080/02533839.1998.9670369

Cited by 6 publications

(3 citation statements)

References 9 publications

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“…Apparatus for fast pyrolysis. A novel fast pyrolysis reactor for converting biomass (forestry wastes) into bio-oil has been developed by the authors [8]. In the developed system, a reaction chamber consisting of a single tapered screw extruder which is chain-driven by a motor with adjustable rotational speeds was designed for simultaneous feeding and pyrolysis of the biomass.…”

Section: Experimental Set-upmentioning

confidence: 99%

Effects of Grain Size and Rotational Speed on the Bio-Oil Yield in a Fast Pyrolysis Reactor Employing a Single Tapered Screw Extruder

Chen

Pan

2011

AMR

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The effects of process parameters of biomass grain size (ranging from 0.425 to 3.35mm), rotational speed (ranging from 20 to 60rpm) and the pyrolysis temperature (ranging from 400 to 550 oC) on the yield of bio-oil were investigated in this study by using a fast pyrolysis reactor with a single tapered screw extruder. This study gives the optimal pyrolysis temperatures and rotational speeds for different grain sizes to achieve peak bio-oil yield. The results indicate that higher feed rates are required for larger grain sizes to achieve peak bio-oil yields. For instance, a 20rpm rotational speed is for 0.425~1.18mm grain sizes (50~57% bio-oil yield), while a 40rpm rotational speed is for 1.7~3.35mm grain sizes (56~60% bio-oil yield). This implies that the productivity of bio-oil can be significantly increased in the current system. For the case of 2.5~3.35mm grain size, which corresponds to an optimal rotational speed of 40rpm, the production rate was estimated to be around 4kg/h.

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Section: Experimental Set-upmentioning

confidence: 99%

Effects of Grain Size and Rotational Speed on the Bio-Oil Yield in a Fast Pyrolysis Reactor Employing a Single Tapered Screw Extruder

Chen

Pan

2011

AMR

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“…where DFPC( , ) is for comparing the input frequency f i with the output frequency f o and outputs a position error pulse number p e (Hsieh et al, 1998); ∆p e is the discrete time change of p e between the nth and (n−1)th sampling periods. In the FC-FLS, a set of suitable membership functions can be obtained by empiricism.…”

Section: Design Of Fuzzy Pulse Pump Controllermentioning

confidence: 99%

“…2. This system is composed of two Position/ Frequency Converters (PFCs) (Hsieh et al, 1998), a Discrete Frequency/Pulse Comparator (DFPC) (Hsieh et al, 1998), an FPPC, a DC motor with a motor driver, an optical encoder, an up/down counter, and a lead screw. The PFC i and PFC o are, respectively, used to convert the input pulse number p i (i.e., input position) and feedback pulse number p o (i.e., feedback position) into discrete frequencies f i and f o .…”

Section: System Descriptionmentioning

confidence: 99%

A design of fast‐locking without overshoot frequency‐locked servo system by fuzzy control technique

Chen¹,

Hsieh

Lee

2004

Journal of the Chinese Institute of Engineers

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In this paper, a Fuzzy Pulse Pump Controller (FPPC) is proposed to realize a Fuzzy-Controlled Frequency-Locked Servo system (FC-FLS) for getting a fast locking response without overshoot. A prototype FC-FLS is designed and built to assess the system performance. In comparison with the Frequency Pump Controller-based FLS (FPC-FLS) and Variable Slope Pulse Pump Controller-based FLS (VSPPC-FLS), the acquisition times of the FC-FLS are improved over 40%. In particular, there is no overshoot in the FC-FLS for any servo distance. This means that a fast-locking FLS, without overshoot, has been successfully implemented as theoretical prediction.

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A design for an adjustable fuzzy pulse pump controller in a frequency‐locked servo system

Chen¹,

Hsieh

Lee

2005

Journal of the Chinese Institute of Engineers

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Adaptive pulse‐pump controller for x‐y mode frequency‐locked stepping servomechanism

Cited by 6 publications

References 9 publications

Effects of Grain Size and Rotational Speed on the Bio-Oil Yield in a Fast Pyrolysis Reactor Employing a Single Tapered Screw Extruder

Effects of Grain Size and Rotational Speed on the Bio-Oil Yield in a Fast Pyrolysis Reactor Employing a Single Tapered Screw Extruder

A design of fast‐locking without overshoot frequency‐locked servo system by fuzzy control technique

A design for an adjustable fuzzy pulse pump controller in a frequency‐locked servo system

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