Fuzzy Temperature Control of A Thermoelectric Cooler
01 Dec 2006-pp 1580-1585
TL;DR: In this paper, a fuzzy controller is applied for the cold-end temperature control of a thermoelectric cooler and the results show that the cold end temperature can be maintained at the fixed value within plusmn 0.0045degC, irrespective of the variation of the cooling load and the ambient conditions.
Abstract: Thermoelectric coolers (TEC) are used in a variety of applications that require extremely stable temperature control. In this paper a fuzzy controller is applied for the cold-end temperature control of a thermoelectric cooler. Fuzzy inference parameters which include the rule base and the shapes of the membership functions are tuned via simulation. The fuzzy control system was examined under variable cooling load and ambient temperature with different memberships functions. The mathematical results show that the cold-end temperature can be maintain at the fixed value within plusmn 0.0045degC, irrespective of the variation of the cooling load and the ambient conditions.
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TL;DR: The proposed SMC approach shows a robustness against the parametric uncertainties due to the nonlinear model of PCs, and a constructive Theorem based on a particular sliding mode surface using Lyapunov approach is demonstrated.
Abstract: This paper deals with an application of the Sliding Mode Control (SMC) in the presence of lumped temperature disturbances in Peltier Cells (PCs). A controller is proposed so that a temperature disturbance reduction is obtained. A constructive Theorem based on a particular sliding mode surface using Lyapunov approach is demonstrated. Specifically, the proven Theorem shows a structural control law which consists of an interacting input law between the two available inputs of current and forced heat convection transfer function (ventilation input). The sliding mode surface is defined in terms of cold and hot state variables, emphasizing a new two sided control approach for PCs. In terms of applications, the localization problems are very important to minimize errors in all cases in which PCs are used. The application approach is targeted on a novel workpiece clamping device, which uses PCs to freeze water on a metallic plate under subzero temperatures. The ice structure is capable of evolving enough bonding strength to clamp workpieces form and force-fitted during machining operations without deforming the piece mechanically. This capability is especially crucial for micro parts as well as for hard to clamp pieces made of brittle or soft materials and irregular shaped complex geometries. The proposed SMC approach shows a robustness against the parametric uncertainties due to the nonlinear model of PCs. Computer simulation results as well as measurements are shown.
31 citations
TL;DR: In this article, an equivalent physical simulator (EPS) consisting of a thermoelectric cooler (TEC), a plate-fin heat sink, and a forced cooling fan is presented.
Abstract: A realistic prediction of the in-orbit transient performance of a nanosatellite space radiator requires a ground-based equivalent space radiator with a small size, simple configuration, and fast response. For this purpose, we present in this paper the design concept, operating principle, and analysis algorithm of a novel equivalent physical simulator (EPS) consisting of a thermoelectric cooler (TEC), a plate-fin heat sink, and a forced cooling fan. The TEC-based EPS achieves the purpose of simulating the in-orbit transient heat radiation in earth's atmospheric environment by adapting two key parameters: the TEC cooling capacity and the thermal resistance of the heat sink cooling fan. This paper offers results of in-depth numerical parametric studies leading to an EPS design that enables robust simulations under both hot-case and cold-case operations. In addition, we present the design and evaluation of a fuzzy controller for the EPS as an attractive alternative to the traditional PID controller. The fuzzy control presented here will have other potential thermal control applications where TECs and forced cooling heat sinks are employed.
25 citations
Cites background or methods from "Fuzzy Temperature Control of A Ther..."
...to improve the control effect of the thermoelectric system [22]....
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...usually the only controlled variable and is always lower than the surrounding temperature [15]–[22], the desired cold-side work-...
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...To overcome these difficulties, we explore here a fuzzy control algorithm as an effective alternative to traditional control methods [22], [23]....
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01 Jan 2015
TL;DR: A review of different flow control methods used in the refrigeration systems is discussed in the present paper as discussed by the authors, the main difficulties and summarize the more recent developments in their control techniques are highlighted.
Abstract: Last decades considerable attention has been given to refrigeration systems in order to decrease its energy consumption. Various control methods for refrigeration systems were developed. These methods differ in their theoretical basis and performance depends on system operating conditions. A review of different flow control methods used in the refrigeration systems are discussed in the present paper. The main difficulties and summarize the more recent developments in their control techniques are highlighted.
11 citations
Cites background from "Fuzzy Temperature Control of A Ther..."
...9, which comprises of four principal: a fuzzifier, a fuzzy rule base, inference engine, and a defuzzifier [50]....
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TL;DR: In this article, a combined electro-optic and pulsed nonlinear vector network analyzer-based (NVNA) load-pull measurement system for distributed multiharmonic electric field ( $E$ -field) measurements is presented.
Abstract: In this paper, a new combined electro-optic (EO) and pulsed nonlinear vector network analyzer-based (NVNA) load–pull measurement system for distributed multiharmonic electric field ( $E$ -field) measurements is presented. The system uses an external EO probe to measure cross-frequency phase-coherent multiharmonic vector $E$ -fields with an 8- $\mu \text{m}$ spatial resolution and 20 MHz–20 GHz bandwidth. We demonstrate the performance of the distributed phase-coherent $E$ -field measurements of $E_{x}$ , $E_{y}$ , and $E_{z}$ components with three harmonics above a commercially available large periphery, packaged, laterally diffused metal-oxide-semiconductor transistor. The transistor was measured at 2.2 GHz under pulsed conditions with 10- $\mu \text{s}$ pulse and 10% duty cycle, while outputting 55.1 dBm of power. The measured $E$ -fields of the operating transistor are animated for the first time and reveal complex nonuniform operation at harmonic frequencies.
9 citations
Cites methods from "Fuzzy Temperature Control of A Ther..."
...A thermoelectric cooler was used to prevent any polarization drift in the laser beam [29]....
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TL;DR: In this article, a nontraditional adhesive technique, using frozen water to clamp, is introduced to address the challenge of deformation-free clamping in manufacturing systems, helping to ensure zero-defect production.
Abstract: Deformation-free clamping plays an important role in manufacturing systems helping to ensure zero-defect production. The fixture of workpieces during machining processes poses challenges not only for microparts but also for thin-walled pieces or free-form surfaces in macromanufacturing. To address this challenge, a nontraditional adhesive technique, using frozen water to clamp, is introduced in this paper. By increasing the cooling power and thus reducing the temperature of the clamping plate, higher adhesive ice strength and, therefore, a safer clamping system during machining process, can be achieved. The objective of this investigation is to ensure a stable low temperature and to compensate for thermal disturbances. Thanks to their structural robustness, Lyapunov-based control strategies demonstrate an appropriate capability to achieve these results in real industrial applications. Model design of the clamping system as well as simulation and experimental results are shown and discussed.
8 citations
References
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01 Aug 1999-International Journal of Human-computer Studies \/ International Journal of Man-machine Studies
TL;DR: Fuzzy logic is used to convert heuristic control rules stated by a human operator into an automatic control strategy, and the control strategy set up linguistically proved to be far better than expected in its own right.
Abstract: This paper describes an experiment on the “linguistic” synthesis of a controller for a model industrial plant (a steam engine). Fuzzy logic is used to convert heuristic control rules stated by a human operator into an automatic control strategy. The experiment was initiated to investigate the possibility of human interaction with a learning controller. However, the control strategy set up linguistically proved to be far better than expected in its own right, and the basic experiment of linguistic control synthesis in a non-learning controller is reported here.
6,392 citations
TL;DR: In this article, an electrical analog of the thermal model for the thermoelectric (TE) device is developed, which allows the researcher to predict the transient and steady state behavior of TE devices.
36 citations
20 citations
TL;DR: In this article, the results of design optimization studies are shown, specifically, the size of the machine and the weight of thermoelectric material required as a function of maximum coefficient of performance for a variety of thermopile configurations.
17 citations
"Fuzzy Temperature Control of A Ther..." refers background in this paper
...The second term on the right hand side of equation (3) represents the heat resulting from Thomson effect [6, 8]....
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...The Energy balance to the thermoelectric material will lead thermoelectric module comprises many pairs of p-n type to the relation thermoelectric material connected in series and clamped C OT(x,t) 02 T(X,t) T 0 T(X,t) P 2 (3) and soldered with two base plates (e....
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...(1), (3) and (4) are the governing equations for the...
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