Conference Program of WCICA 2012

Conference Program WCICA 2012
BIAN, Xinqian
Jia, Heming
Harbin Engineering Univ.
Northeast Forest Univ.
Towards the diving control of an autonomous underwater vehicle (AUV),
a robust controller built upon L2 disturbance attenuation method with
recursive backstepping technique is addressed. External disturbances
are eliminated through L2 controller. A robust controller incorporated
with switching control scheme is proposed against the parameter uncertainties
with guaranteed stability. Different from conventional parameter
adaptive learning method, the decreasing problem of learning precision
can be avoided due to the fast varying of uncertain parameters, and parameter
switching law can be obtained through the Lyapunov stability
theory. The proposed controller yields asymptotical convergence to the
given depth for the vehicle. Finally, simulation experiments are employed
to illustrate the effectiveness of the proposed control scheme.
FrA06 13:30–15:30 Room 302
Modeling
Chair: INOUSSA, GARBA
Central South Univ.
Co-Chair: Liu, Xi Beijing Univ. of Civil Engineering & Architecture
◮ FrA06-1 13:30–13:50
Research on Multi-zone VAV Air Conditioning System Modeling,
pp.2968–2972
Liu, Xi
Beijing Univ. of Civil Engineering & Architecture
Variable air volume systems are nonlinear, time-varying and multivariable
with large time delay. Model predictive control can achieve satisfactory
stability and energy-saving, the performance of which depends
on precision and generalization capability of the predictive model. To
overcome difficulties in modeling by mechanism, this paper proposes a
modeling method of multi-zone VAV systems based on neural networks.
The factors influencing on the sensible cooling load and coupling between
zones are analyzed and consequently the structure of the neural
network model is determined. In order to fully demonstrate the dynamic
characteristics of the VAV system, neural network training samples
cover all the VAV dynamic range. To increase generalization capability,
Bayesian regularization algorithm is used to train the network. Experimental
results show that the neural network predictive model has
satisfactory accuracy and good generalization performance.
◮ FrA06-2 13:50–14:10
Modeling for flying boats in regular wave, pp.3019–3024
Zhu, Yinggu
Fan, Guoliang
Yi, Jianqiang
Inst. of Automation, Chinese Acad. of Sci.
Inst. of Automation, Chinese Acad. of Sci.
Inst. of Automation, Chinese Acad. of Sci.,China
Although flying boats have been studied for over one hundred yeas,
simulation of flying boats in waves and controllers designing for flying
boats are still new research fields. After analyzing the forces acting
on a flying boat, the flying boat is modeled in this paper as a special
airplane. The forces from water are discussed and calculated by the
2-dimensional (2D) strip theory which is widely used in the force approximation
of planing crafts. And the model is validated by experiment
data, which shows the mathematical model has an acceptable performance
on the motion-prediction of the flying boat in water with regular
waves.
◮ FrA06-3 14:10–14:30
EBE-based Parallel Finite Element Analysis of Electric Field in Aluminum
Reduction Cell, pp.2939–2943
Zhao, Xianyong
Chen, Xiaofang
Gui, Weihua
Central South Univ.
Central south Univ.
Central South Univ.
Finite element analysis for large-scale complicated structure such as
aluminum reduction cell makes higher demand on memory capacity
and calculation speed, which often results in failure or inefficiency of
traditional serial computation for such large-scale problems. Finite element
EBE-PCG algorithm is proposed on the basis of EBE(Element-
By-Element) idea and Jacobi preconditioned conjugate gradient(PCG)
method. The main difficulties in parallel implementation of this algorithm
are discussed and solved, such as data organization of grid model,
mixed elements processing and data communication. Subsequently,
parallel program of finite element analysis based on EBE-PCG is developed
using C language and MPI standard library, and then applied
to numeric simulation of electric field distribution in aluminum reduction
cell. The computational accuracy of parallel program developed is verified
through comparison with commercial finite element software AN-
SYS. Experiment results show that the method is of very high parallel
efficiency and can greatly shorten the calculation time, which indicates
the effectiveness of EBE’s use in parallel computation of large-scale
complicated structures.
◮ FrA06-4 14:30–14:50
Quality Model for Integrated Security Monitoring and Control in Water
Distribution Systems, pp.3107–3112
Zubowicz, Tomasz
Arminski, Krzysztof
Brdys, Mietek
Gdansk Univ. of Tech.
Gdansk Univ. of Tech.
Gdansk Univ. of Tech.
This article addresses the problem of drinking water distribution system
(DWDS) security in the terms of water quality which in the era of terrorist
threat is of high importance to the public. The contribution of this
paper is the development of the so called security module to extend
a multi-species water quality model. This gives an insight to the situation
in DWDS not only under normal operational conditions but also
in case of a malicious attack on water quality. Moreover the security
inputs are formally introduced to the model structure. This module
enables simulation of both bacterial and/or chemical water contamination
in DWDS environment. Previously defined inputs are utilised in
proposed experiments by an attacking agent to influence the DWDS
quality. The purpose of model development is to enable water scientists
and water authorities to simulate the contamination propagation
pathways and mechanisms throughout the network without omitting the
’natural’water chemistry effects. A simple simulation example for
the exemplary DWDS illustrates the model performance for two distinct
contamination scenarios.
◮ FrA06-5 14:50–15:10
Model Establishment and Simulation for Finite Length Cylindrical Surface
Heat and Moisture Transfer outside the Borehole, pp.3242–3247
Zhang, Yating
Jiang, Dawei
Zhang, Ye
Beijing Univ. of Tech.
Beijing Univ. of Tech.
Beijing Univ. of Tech.
Basing on the cylindrical heat transfer model of vertical ground source
heat exchanger, and according to the mass conservation and energy
conservation theorem, established a finite length cylindrical heat and
moisture transfer model for soil layer around the borehole. Simulated
the non-steady-state heat and moisture transfer of soil layers around
the heat exchanger under summer operating conditions by using COM-
SOL multi-physics coupling analysis software, and analyzed the influence
of different soil thermal properties and initial moisture contents in
temperature field and moisture field of soil layers exerted by the heat
and moisture transfer.
◮ FrA06-6 15:10–15:30
Marine Vehicle Modeling and Tracking Using Wavelet Type Nets Model,
pp.3118–3125
INOUSSA, GARBA
Peng, Hui
Central South Univ.
Central South Univ.
The main objective of this paper is to address the tracking control problem
of a ship moving with a constant velocity along a desired path.
To this end, a combination of mathematical model (MM) and statistical
model, namely the expanded exponential weight wavelet network
based ARX (E-EW-WNN-ARX) model is proposed as internal predictor
of a model predictive controller (MPC). Firstly, the EW-WNN-ARX
model is used to describe the ship motion between the difference of
heading angle deviation and the rudder angle of the ship. To represent
the ship’s motion nonlinearity, the rolling angle is used as the EW-
WNN-ARX model index to allow the model parameters to vary with the
ship moving state. The EW-WNN-ARX model is identified off-line by
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