Conference Program of WCICA 2012

Conference Program WCICA 2012
work done in the paper also improves the controller design method for
linear quadratic tracking problem.
◁ PSaC-17
H ∞ Model Reduction for Positive 2-D Discrete Systems in Roesser
Model, pp.1733–1738
Wang, Cuihong
Shanxi Normal Univ.
In this paper, we are concerned with H ∞ model reduction of 2-D discrete
systems in Roesser model. For positive 2-D discrete systems, the
aim is to construct a positive 2-D reduced-order system such that the
error system satisfies a prescribed H ∞ norm bound constraint. Based
on a system augmentation approach, a new sufficient condition is proposed
to ensure that the error system is stable and satisfies a prescribed
H ∞ norm. Then the existence condition of the reduced-order
system matrixes are given and an corresponding iterative linear matrix
inequality(LMI) algorithm is presented. Finally, a numerical example to
illustrate the effectiveness of the proposed design procedures is presented.
◁ PSaC-18
Optimal Feedback Reentry Guidance of Hypersonic Vehicle Based on
Improved Gauss Pseudospectral Method, pp.2457–2462
Sun, Yong
Duan, Guang-Ren
Harbin Inst. of Tech.
Harbin Inst. of Tech.
This paper presents an optimal feedback reentry guidance for the hypersonic
vehicle. The proposed method implements a closed-loop
feedback approach via fast computation of a series of open loop optimal
control problems. At each sampling period, the optimal control
problem is solved by the improved Gauss pseudospectral method (IGP-
M), which is an efficient method to solve the general nonlinear optimal
control problem. The IGPM approximates the state and control by the
polynomials at the Legendre-Gauss (LG). The costate can be obtained
and the optimality of the solution is also checked easily. The proposed
method can deal with the state and control constraints explicitly. The
various performance can be realized by considering different cost function.
Simulation results demonstrate that the hypersonic vehicle tracks
the reference trajectory well in the presence of the uncertainty of aerodynamic
force.
◁ PSaC-19
The stability analysis of the machine drive system, pp.2463–2467
Zhang, Huiduan
Henan Polytechnic Univ.
In consideration of the bearing stiffness, the contact deformation between
the ball screw and the worktable, and the contact deformation
between the worktable and the guide, lateral, longitudinal and torsional
vibration of the preload screw and vibration of the worktable are studied.
Dynamic model of the ball screw drive system of machines is established
using Lagrange equation. The model is analyzed by the mode
superposition and Runge-Kutta method and the stability boundaries are
plotted. Effects of system’s parameters on stability of the ball-screw
system are discussed. The present work supplies a base for designing
the drive system.
◁ PSaC-20
Studied on Anti-interference Control Based on the Disturbance Observer,
pp.2503–2505
He, Naibao
Gao, Qian
Huaihai Inst. of Techology
Huaihai Inst. of Techology
The adaptive law is designed to approximate the disturbance, and two
controllers are designed for the slow-loop system under uncertainties
and the fast-loop system in interference environment, respectively. In
addition, a fast adaptive disturbance observer is employed by adding
nonlinear exponential item into adaptive laws of parameters and approximating
errors to make the tracking errors are converged to zero
in limited time. Moreover, the control characters are systematically
analyzed. Finally, the superiorities in rapidity and convergence are
demonstrated by simulation analysis of the control of NSV at hypersonic
speed.
◁ PSaC-21
Control Three-Phase Star-Connected Switch Three-Level Rectifier
Considering Alternative Performance Indices, pp.2506–2511
Zhang, Shaoru
Hebei Normal Univ.
With the development of power electronics, the power quality of AC
power supply is increasingly paid attention to. In general, diode uncontrolled
rectifier and thyristor phase controlled rectifier are adopted for
AC/DC convertion, which inject plentiful harmonic and reactive power
into AC mains, and result in serious pollution. So lots of reseaches have
been focus on high input power factor and minimum harmonic injection
into AC mains. A novel control method for three-phase star-connected
switch three-level rectifier was proposed in order to meet harmonic current
distoration limits set by IEEE-519. The desired source currents
are output from a current compensator, the compensator gain and the
phase delay at each phase for each order harmonic are determined by
an optimal control algorithm, where the permissible levels of individual
and total harmonic distortion, power factor, as well as active power
consumption are taken into account. The desired source currents can
drive the bidirectional switches. The simulation and experimental results
show that this control strategy is effective in minimizing source current
distortion and maximizing load power factor. The proposed converter is
suitable for a wide power application.
◁ PSaC-22
Nonlinear MPC for Attitude System of Miniature satellite using Multiple
MEMS Actuators, pp.2523–2528
Jiang, Yu
Zhang, Yingchun
Jin, Jing
Harbin Inst. of Tech.
research centor of satellite Tech.
Harbin Inst. of Tech.
This paper presents a configuration scheme of multiple MEMS reaction
wheels for CubeSat. In this configuration three pairs of arrays of
MEMS reaction wheels are installed symmetrically within the CubeSat’s
surface, wherein each array is composed by 4* 4 co-rotating elements.
Through counter-rotating of each pair of symmetrical arrays three zero
momentum wheels are achieved. Assuming that control moment of
MEMS reaction wheel have on-off form, two attitude control methods
are designed. When change of angle is very small for attitude stabilization,
constraints set of the disturbance and state is described as
polytope, and constraint tightening method is used to design control
law for linearized attitude equation. When performing large angle for
attitude maneuver, an extended state observer is designed to estimate
the disturbances. For predicting the attitude angle, the fliess expansion
method of nonlinear attitude equation is proposed. The optimal control
law is obtained by solve minimum of attitude predicting error finite times.
Simulation results show the effectiveness of the proposed methods.
◁ PSaC-23
Structural Properties of Multi-Agent Linear Systems with Applications
to Leader-Following Consensus, pp.2550–2555
Ni, Wei
Wang, Xiaoli
Yang, Jie
Zhao, Ping
Nanchang Univ.
Harbin Inst. of Tech. at Weihai
Chinese Acad. of
Univ. of Jinan
The controllability and observability of leaderfollowing multi-agent linear
systems under switching topology are considered. As for the controllability
problem, the admissible control input for each follower agent can
only use relative and local information from its neighbors and the control
objective is the convergence of each follower’s state to to that of
the leader agent. As for the observability problem, the output of the
multi-agent systems is all the information transmitted in the multi-agent
network. These properties are used in the leader-following consensus
problem under switching topology.
◁ PSaC-24
Prediction Model of Sintering Burden Based on Information Entropy and
Chaos PSO Algorithm, pp.2566–2569
Qin, Ling
Wuhan Polytechnic Univ.
Considering the characteristics of the nonlinear, complexity and relativ-
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