Open-source Modelica models for the control performance simulation of chiller plants with water-side economizer

2021 ◽  
Vol 299 ◽  
pp. 117337
Author(s):  
Chengliang Fan ◽  
Kathryn Hinkelman ◽  
Yangyang Fu ◽  
Wangda Zuo ◽  
Sen Huang ◽  
...  
Keyword(s):  
Open Source ◽  
Control Performance ◽  
Performance Simulation ◽  
Water Side

APP4MC: Application platform project for multi- and many-core systems

2017 ◽  
Vol 59 (5) ◽  
Author(s):  
Robert Höttger ◽  
Harald Mackamul ◽  
Andreas Sailer ◽  
Jan-Philipp Steghöfer ◽  
Jörg Tessmer
Keyword(s):  
Open Source ◽  
Real Time Systems ◽  
Time To Market ◽  
Performance Simulation ◽  
Community Benefits ◽  
Development Processes ◽  
Great Possibility ◽  
Hardware Costs ◽  
Many Core ◽  
Time Systems

AbstractSince especially the automotive domain increasingly utilizes multi- and many-core systems, appropriate models, analyses, and tooling are required to address challenges that were nearly non existent so far. APP4MC is an open source Eclipse platform that provides AUTOSAR compliant common data models namely AMALTHEA, basic parallelization features, visualizations, and the great possibility to add any existing tooling. For example, Eclipse Capra can be added to provide comprehensive traceability throughout the development processes but any proprietary, commercial, open-source, or prototypical implementations can be integrated. The platform enables the creation and management of complex tool chains including performance simulation and validation. The entire community benefits from reduced hardware costs, faster time to market, higher quality systems, and rapid adoption. APP4MC is not retricted to the automotive domain and utilizable in robotics or generic real-time systems as well.

scholarly journals Investigation on the Modeling and Dynamic Characteristics of a Novel Hydraulic Proportional Valve Driven by a Voice Coil Motor

2021 ◽  
Vol 67 (5) ◽  
pp. 223-234
Author(s):  
Mingxing Han ◽  
Yinshui Liu ◽  
Yitao Liao ◽  
Shucai Wang
Keyword(s):  
Structural Parameters ◽  
Voice Coil Motor ◽  
Fast Response ◽  
Step Response ◽  
Test Results ◽  
Control Performance ◽  
Proportional Valve ◽  
Performance Simulation ◽  
Non Linear ◽  
Water Hydraulic

As the key control component of the water hydraulic systems, the water hydraulic proportional valve has a significant influence on the control performance of the systems. Due to the poor viscosity and lubricity of water, the valve spool resistance is large and non-linear. In this study, a novel fast-response water hydraulic proportional valve is presented. The actuator of the valve adopts a voice coil motor (VCM), which has the advantages of fast response, high control precision and small volume. In order to realize the fast control of the valve, a lever amplifier is designed to obtain enough actuation force. A detailed and precise non-linear mathematical model of the valve considering both the valve’s structural parameters and VCM electromagnetic characteristics is developed. A comprehensive performance simulation analysis has been carried out, mainly divided into an electromagnetic simulation, an analysis of the characteristics of the lever magnifier, and a dynamic performance simulation of the valve. The simulation results show that the adjusting time is about 28ms, and the maximum overshoot is about 5 %. The step response rise time is about 15 ms. The test rig of the valve and VCM have been built. The test results of the prototype show that the optimal stroke range of VCM is 4 mm to 15 mm. The maximum overshoot of the valve is around 10 %; the adjusting time is about 30 ms in the opening process and 35 ms in the closing process. The test results prove that the valve has good static and dynamic control performance.

Study on Adaptive Dual-Voltage Method to Improve the Control Performance of High-Speed Solenoid Valve

2012 ◽  
Vol 220-223 ◽  
pp. 615-621 ◽  
Author(s):  
Ming Su ◽  
Yu Gang Liu ◽  
Hong Tao Yang
Keyword(s):  
High Speed ◽  
Dynamic Performance ◽  
Pressure Change ◽  
Control Device ◽  
Solenoid Valve ◽  
Control Performance ◽  
Performance Simulation ◽  
Experiment Platform ◽  
Simulation And Experiment

It is presented that a new adaptive dual-voltage method to improve the control performance of high-speed solenoid valve and a control device of high-speed solenoid switch valve that could adapt to the pressure change of supply inlet is developed. Based on AMESim, this paper has processed the static and dynamic performance simulation of adaptive dual-voltage method to improve the performance of high-speed solenoid valve. This paper has built an experiment platform of adaptive dual-voltage method to improve the control performance of high-speed solenoid valve, and carried out corresponding experiments. Both simulation and experiment have proved that the method had obviously effect to improve the control performance of high-speed solenoid switch valve and the developed high-speed solenoid switch valve can effectively control the system

scholarly journals A Four-Stage Method for Active Control with Online Feedback Path Modelling Using Control Signal

2019 ◽  
Vol 9 (15) ◽  
pp. 2973
Author(s):  
Somanath Pradhan ◽  
Xiaojun Qiu ◽  
Jinchen Ji
Keyword(s):  
Control Systems ◽  
Active Control ◽  
Control Signal ◽  
System Stability ◽  
Control Performance ◽  
Performance Simulation ◽  
Control Operation ◽  
Feedback Path ◽  
Path Modelling ◽  
Online Feedback

The presence of control signal feedback to the reference microphone in feedforward active control systems deteriorates the control performance. A four-stage method is proposed in this paper to carry out online feedback path modelling with the control signal. It consists of controller initialization, feedback path modelling using decorrelation filters, active control operation, and feedback path change detection for maintaining the control operation. In contrast to the existing auxiliary noise injection method, the proposed method uses five switches and three thresholds to control and maintain the system stability by avoiding the interference between control operation and feedback path modelling, and adaptive decorrelation filters are used to increase the feedback path modelling performance. Simulation results reveal that the proposed method is capable of tracking feedback path changes without injecting any auxiliary noise and maintaining the noise reduction performance and stability of the system.

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