Conference Program of WCICA 2012

Conference Program WCICA 2012
that the highest sample frequency is 10KHz when it works with a SD
card.
◁ PSaB-05
Three-Dimensional Stage Self-Calibration: A General Theory Framework,
pp.4220–4225
Zhu, Yu
Hu, Chuxiong
Hu, Jinchun
Tsinghua Univ.
Tsinghua Univ.
Tsinghua Univ.
In this paper, a general self-calibration theory framework is presented
for three-dimensional precision stages to determine the stage error.
Four measurement views of a cubic artifact on the three-dimensional
precision stage are utilized to provide the symmetry, transitivity and
redundance. The first-order components of the stage error, i.e., the
nonorthogonality and the scale difference, are determined through the
first three measurement views. And the residual components of the
stage error are then figured out by a least-square based calculation
law, which completes the stage error determination. Additionally, the
parasitic errors related to the artifact and the misalignment errors of all
measurement views can all be identified through algebraic manipulations.
Computer simulation is finally carried out and the results validate
that the proposed algorithm can accurately realize the stage error. The
proposed scheme actually provides a framework as a principle to solve
the three-dimensional self-calibration problem for practical engineers.
◁ PSaB-06
Coherent integration weak target detection algorithm based on short
time sliding window, pp.4264–4266
Guo, Yunfei
Zhang, Yunlong
Xue, Anke
Hangzhou Dianzi Univ.
Inst. of Information & Control
Hangzhou Dianzi Univ.
For the problem of weak target detection under lower signal noise ratio
in radar detection system, a key technique is to enhance target echo
energy by long time coherent integration. During the integration period,
the target may migrate across radar range cells with integration time
increasing. Direct coherent integration will lead to echo energy spread
in range cells and deteriorate integration effect. A coherent integration
algorithm based on short time sliding window is proposed in this paper.
It can correct range migration before integration. Radar signal is formed
into a first in first out queue. Then according to constraint condition, the
queens are continually renewed by the sliding window. The queens are
coherent integrated at last. Simulation result shows that the proposed
algorithm can correct range migration efficiently and improve coherent
integration capability.
◁ PSaB-07
Frequency Estimation of Multisection Signals with Same Frequency and
Length based on Spectrum Correlation, pp.4283–4286
Shen, Yanlin
Tu, Yaqing
XIAO, WEI
Su, Dan
Logistical Engineering Univ.
lLogistical Engineering Univ.
Logistical Engineering Univ., Chongqing, P.R.C
Logistical Engineering Univ.
Aiming at multisection sinusoidal signals with the same frequency and
length, a frequency estimation algorithm of multisection signals with
the same frequency and length based on spectrum correlation is proposed.
It can improve the frequency estimation precision of short-time
sinusoidal signal under the condition of low SNR. Firstly, generate a
spectrum zoom sequence and calculate the spectra of corresponding
frequencies; Secondly, design a phase-difference compensating factor
matrix to overcome phase discontinuity among different sections of signals,
and generate a search-frequency array to modify unknown parameters
in the phase-difference compensating factor matrix; Thirdly, adjust
the spectrum zoom sequence corresponding to accumulation spectrum
and calculate the accumulation spectrum; Finally, calculate spectrum
correlation sequence with corrected power spectra and accumulation
spectrum, and search the maxima of spectrum correlation sequence
and then its corresponding frequency is the frequency estimation value.
Simulated experiment results demonstrate that the proposed algorithm
has better frequency estimation precision and noise immunity than
existing methods, and significant theoretical and practical value.
◁ PSaB-08
A Dynamometer Design and Analysis for Measurement the Cutting
Forces on Turning Based on Optical Fiber Bragg Grating Sensor,
pp.4287–4290
Liu, Mingyao
Tao, Xiaoliang
Wuhan Univ. of Tech.
Wuhan Univ. of Tech.
Abstract - The cutting forces generated in metal cutting have a direct
influence on tool wear or failure, quality of machined surface and accuracy
of the work piece. In this paper, a turning dynamometer that
can measure static and dynamic cutting forces has been designed and
constructed, we put Fiber Bragg Grating sensor into cutting force. In
order to reduce interference of the test data, we designed an octagonal
ring as sensitive element. We used strain gauges and Fiber Bragg
Grating sensor to detect surface strain of the elastic rings and get different
sensor’s data. Contrast the data to optimization the fiber grating
mounted places. Finally, experiments with different sensors to show
that the Fiber Bragg Grating sensor could be used reliably to measure
cutting forces.
◁ PSaB-09
On Binary Switching Finite Networks, pp.4347–4349
Yu, Tao
Zhou, Xingxing
Xu, Changqing
Zhejiang A&F Univ.
Zhejiang A&F Univ.
Suzhou Univ. of Sci. & Tech.; Zhejiang A&F Univ.
We call a finite graph G = (V, E) a binary network if the state set of
its nodes has only two elements,say, 0 and 1, representing respectively
’OFF’ and ’ON’ state. A switch at node v switches both the state of v
and the state of each of its neighbors. It is shown in [1,5] that given
any intial state of a network of order n > 3, we can always reach at a
consistant status, i.e., either all the nodes are ON or all are OFF. In this
paper we consider a more general problem: Given a subset S ⊂ V ,
can we reach to a state such that the state of each node within S is 1(or
0) while the states of nodes outside S is another? We present some
sufficient conditions for some specific S that satisifes this condition.
◁ PSaB-10
A new estimate method for linear constrained systems, pp.4463–4466
Wen, Chuanbo
Cai, Yunze
Xu, Xiaoming
Shanghai Dianji Univ.
Shanghai Jiao Tong Univ.
Shanghai Jiao Tong Univesity;
This paper deals with the problem of optimal filtering for linear discrete
constrained dynamic systems. The constraint matrix and constraint
vector in this system are allowed to vary not only in the value but also
in the dimension. Firstly, the original constrained state is transformed
into a new reduced state model without constraint. Then, the prediction
of the reduced state is given by using the least square method. Finally,
the optimal estimate of original state is produced by the update process
similar to the Kalman filter. A numerical example is presented to
demonstrate the effectiveness of the new method.
◁ PSaB-11
Subscriber Location in CDMA Wireless Networks, pp.4390–4394
Ali, Zahid
Memon, Qurban
KFUPM
UAE Univ.
Location estimation in Wireless networks has become an important feature
for improvement in public safety service. Its potential applications
include location sensitive billing, asset tracking, fraud protection, mobile
yellow pages, fleet management, etc. Several location techniques
using terrestrial wireless network elements and radio signals have been
proposed over the years, but multipath propagation, multiple access interference
(MAI), and non-line-of-sight propagation have impeded the
accuracy in mobile station (MS) positioning. Traditional location algorithms
have derived location estimates assuming single user environment.
However this assumption is not correct as measurement bias is
introduced due to MAI. An interference cancellation based delay locked
loop (DLL) for MS delay estimation is proposed in this paper, which is
180