Smerpitak, Krit
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Item type:Publication, Toward Interoperable SCADA: Node-RED-Based Edge Integration of Heterogeneous PLCs and IoT Devices(2025-01-01); ; This article presents a novel approach to supervisory control and data acquisition (SCADA) design that emphasizes interoperability through edge integration, using Node-RED as an open-source programming platform deployed on an industrial edge computer. The proposed architecture integrates multiple-vendor programmable logic controllers (PLCs) and an Internet of Things (IoT) gateway at the edge layer to enable seamless interoperability across local control systems. A lab-scale case study demonstrates the feasibility of this integration, featuring four remote terminal units (RTUs) communicating concurrently with a SIMATIC IPC327G edge computer via standard protocols. Specifically, a SIMATIC S7-1200 (RTU-1), MELSEC iQ-F FX5U (RTU-2), and CompactLogix 1769-L30ER (RTU-3) control an object sorting station, a parcel sorting station, a water temperature control station, respectively, while a UG65 gateway (RTU-4) enables bidirectional data transfer between the edge computer and LoRaWAN devices. The inclusion of InfluxDB alongside Node-RED supports data logging and reporting functionalities. By distributing protocol translation, data processing, and shop-floor supervisory control to the edge layer, the architecture achieves real-time, vendor-neutral data orchestration while maintaining compatibility with a higher-level SCADA master terminal unit (MTU) or cloud system. Experimental results from both functional and performance testing confirm the system’s viability as a cost-effective, vendor-agnostic solution for modern industrial automation, offering a scalable model for multi-protocol industrial environments. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Modification of Cockcroft-Walton-based high-voltage multipliers with 220 V and 50 Hz input for non-thermal food processing apparatus(2020-08-01); A design of high-voltage multipliers to generate underwater shockwaves is one of the most important factors for successfully providing non-thermal food processing in a cost-effective manner. To be capable of fully utilizing the Cockcroft-Walton-based high-voltage multipliers for underwater shockwave generation, this paper presents a topological modification of three interesting design approaches in bipolar structure for 220 V and 50 Hz AC input to generate more than 3.5 kV DC output within short time periods. In addition to Cockcroft-Walton multipliers (CWMs), the first modified scheme employs a positive full-wave rectifier (FWR) and positive voltage multiplier block (VMB), the second modified scheme employs positive/negative half-wave rectifiers (HWRs), and the last modified scheme employs a switched-capacitor AC-AC converter. To comparatively analyze their performances, the digitally controlled operations of the modified realization schemes as well as their electrical characteristic estimation based on a four-terminal equivalent model are described in detail. The effectiveness of three modified circuit configurations and the correctness of the given theoretical analysis are verified through SPICE (Simulation Program with Integrated Circuit Emphasis) simulation results. The formulas achieved from theoretical estimation are particularly useful when designing the proposed high-voltage multipliers (HVMs) because good agreement between the theoretical and simulation results can be achieved. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Applying radar chart for process control behavior(2018-06-08); This paper presents the technique to show the controller parameters value that can support decision making of controller action and instruments, actuator operation. In addition, energy consumption is detected of any points of process operation. The paper describes method to detect and collect the assigned process control parameters from process components then display their parameters by radar chart. All of assigned parameters are used to construct the plotted of radar figure. The paper designs background and foreground by representation with rectangular array and length of each spoke in radar chart is proportional to magnitude of set value(SV), manipulate value(MV), process value(PV) of PID controller parameters. In addition, watt power (W) of energy consumption in the process is detected and stored. Each spoke of radar chart represents each parameter that converts to scale as 0-100%. The script functions are developed at the SCADA (Supervisory Control and Data Acquisition) station to detect, collect and scale, then store detected parameters in database. The experiments perform in case study of level loop control of water tank processes by using a proportion-integral-derivative (PID) function in the Programmable Logic Controller (PLC) and Wonderware InTouch SCADA software. The technique can apply for exiting SCADA to create the radar chart. Nevertheless, the new version of SCADA software can support the feature but it depends on cost license fee. Moreover, the technique can support the operators and engineers to make decision of process devices performance (instrument, actuator, controller), process operation and condition. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, A technique for mechanical adjustment of DC motor by virtual model(2007-12-01); ; Ukakimapurn, PrapartThis paper presents a technique to adjust and improve mechanical responses of DC Motor. The proposed technique uses math model for simulation to observe the transience and steady state response in no-load condition. Information derived from the simulation results can be applied to compensate the mechanical loss, inertia, viscous friction by feeding electrical energy. The test results of the compensation technique in this research can adjust and improve the response of speed and torque under reasonable tests. Moreover, this technique can apply to virtual load for Dynamometer. © ICROS. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Partial Discharge Characteristics of MV Switchgear Using TEV and HFCT Sensors(2024-01-01); - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Bilinear discrete PID×(n-2) stage PD cascade controller for SISO systems(2012-12-01); - Some of the metrics are blocked by yourconsent settings
Item type:Publication, An unmanned bicycle versus linear quadratic optimal controls(2012-12-01); - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Discrete-time PIDA Controller designed by Kitti's method with Bilinear transform(2012-12-01); - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Simple CCO using cciis and S-R latch and its application(2010-06-01); ; ; Sasaki, HlrofumiThis article presents a, simple circuit technique based on commerciallyavailable devices to realize current controlled, oscillator (CCO) with twolow-impedance input terminals. By suitably setting two input signals, the linearfrequency-current relation of the proposed CCO can be either positive ornegative slope in the same circuit configuration. The oscillating outputfrequency linearly proportional to the difference between two input currents canbe obtained. The realization method is employed in second-generation currentconveyors (CCIIs) and, Set-Reset (S-R) latch. Experimental results verifyingperformances of the proposed, CCO are closely agreed, with expected, values. Toshow the usefulness of the proposed, oscillator, an application example incurrent-mode variable- frequency control for buck converter is also included.ICIC International © 2010. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Wincc-based process simulation for virtual commissioning of scada system integration(2020-01-01);