Dissertation > Excellent graduate degree dissertation topics show

Research and Implementation on Cascade Predictive Control of Multi-Zone VAV Air Conditioning Systems

Author: LiuXi
Tutor: WeiDong
School: Beijing Construction Engineering College
Course: Control Theory and Control Engineering
Keywords: VAV Cascade Control Neural Networks predictive control
CLC: TU831.3
Type: Master's thesis
Year: 2012
Downloads: 46
Quote: 0
Read: Download Dissertation


There are several control loops in Variable air volume (VAV) systems, and these loops usePID control scheme. PID parameter setting has a great impact on the control systemperformance.There are several equipments in this complex system, which should adjust PIDparameter according engineer’s experience in the different applications. There is noself-learning ability on PID control algorithm,which makes a difficulty in field application.This paper presents a neural network cascade predictive control, which combine thesuperiority of both predictive control and cascade control. In this method, two neural networkcontrollers are used as inner and outer controller in a cascade structure. Outer loop controlleris used to calculate the set air flow of input air-conditioned area. the inner loop controller isused to control air-valve. Inner and outer control are based on feedback control and the Euler-Lagrange optimal control algorithm, which adopt multi-step prediction optimizationperformance index to overcome the uncertainties and complexity of change. The predictionmodel based on the BP network, the outer loop predictive model is a temperature model,theinner loop predictive model is a air flow model.After researching the control strategy,experiments were carried out in the multi-zoneVAV system Laboratory of Beijing University of Civil Engineering and Architecture. Thefactors influencing on the sensible cooling load and coupling between zo nes are analyzed andconsequently the structure of the neural network model is determined. Then use the embeddeddevelopment board and I/O modules to acquire data of two zone,including temperature, windspeed,static pressure pipes, etc. In order to fully demonstrate the dynamic characteristics ofthe VAV system, neural network training samples cover all the VAV dynamic range. Aftercomparing the generalization ability of the BP network and the RBF network, and this paperselect the BP neural network to establish the temperature model and the air flow model.Basedon the established model, programming the algorithm operated in Windows CE6.0is used tocontrol the VAV air-conditioning system in Laboratory.Experimental results show that the neural network cascade predictive control couldrealize decoupling control, which ensure temperature and air flow control accuracy ofzone.Self-learning ability of neural networks can solve the problem of debugging PIDparameters, and the control system is portable.

Related Dissertations

  1. High Speed Frequency Measurment and Non-Linearity Correction of Frequency Modulated Capacitive Displacement Sensor,TH822
  2. Satellite Attitude Control Methods Using Only Magnetorquers,V448.222
  3. Research of Predictive Control in Water Treatment Plant Based on Neuron Network,TP273.1
  4. Robust Model Predictive Control of Networked Systems,TP273
  5. Research on Predictive Control and Simulation of pH Value Based on the Confection Process of Sodium Nitrate,TP273
  6. Research on Temperature Control System for High-Performance Oven-Control Crystal Oscillator (OCXO),TN752
  7. Research on Anti-periodic Solutions of Delayed Cellular Neural Networks without Assuming Global Lipschitz Conditions,TP183
  8. Designs and Applications of Fuzzy Synthetic Evaluation Models Based on Parallel Algorithms,TP18
  9. Spectrum Variation of Vegetation in Yanzhou Coal Mine Area and Heavy Metal Stress Characteristic,X173
  10. An Explicit Model Predictive Control of Networked Control Systems,TP273
  11. Stage Fault Diagnosis Based on Data Fusion,TP18
  12. Non-linear Time-Varying System Modeling Using Time-Varying High-Order Neural Networks,TP183
  13. Predicting Short-term Foreign Exchange Based on Wavelet Neural Network,F224
  14. Predictive of Gas Emission Based on CIPSO-ENN Coupled Algorithm,O242.1
  15. Explicit Model Predictive Control in Power Electronics and Power Systems,TM76
  16. Fuzzy Modeling and Hybrid Control of Rotary Kiln Calcination Temperature,TP273.4
  17. Research of Multi-objective Predictive Control for Model Mismatch,TP13
  18. The Improvement and Simulation Research of Dynamic Matrix Control Algorithm,TP273
  19. Design and Application Research on Control System of Sinter Mixture Moisture,TF325
  20. Intelligent Control System of Chlorine Dosing in Waterworks Based on Embedded System,TU991.2
  21. Research of MSC Dynamic Reactive Power Compensation System in Mine Electric Power Network,TM761.1

CLC: > Industrial Technology > Building Science > Housing construction equipment > Air-conditioning, heating, ventilation,and its equipment > Air-conditioning > Air-conditioning systems
© 2012 www.DissertationTopic.Net  Mobile