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2013 Vol. 39, No. 3

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Active vibration control and attitude maneuver of flexible spacecraft via direct adaptive control method
Liu Min, Xu Shijie, Han Chao
2013, 39(3): 285-289.
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Abstract:
An attitude maneuver and active vibration control method was proposed for flexible spacecraft with piezoelectric material as flexible modes active suppression sensors and actuators. Firstly, the almost strict positive real (ASPR) property of flexible spacecraft with collocated sensors and actuators ...
Design of a controller for morphing aircraft based on the LQ/RHO multi-loop technology
Chen Wei, Lu Jingchao, Zhang Weiguo
2013, 39(3): 290-294,314.
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Abstract:
In order to ensure the flight stability of morphing aircraft under the morph state, a multi-loop controller was proposed. The inner-loop controller was designed by the linear quadratic (LQ) output feedback approach, which was used to ensure stability under the fixed-wing state. In the process of mor...
Multi-degree-of-freedom vibration suppression of space trusses based on multiple dynamic vibration absorbers
Yang Kai, Cui Long, Huang Hai
2013, 39(3): 295-299.
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Abstract:
To implement vibration control of large and light flexible space trusses (LLFST), an adaptive method of suppressing MDOF vibrations of trusses via multiple dynamic vibration absorbers (DVA) was presented. Firstly the single-input and single-output (SISO) control strategy for MDOF vibration control w...
Torque control based on torque feedforward and rudder angle compensation
Niu Guochen, Wang Wei, Wei Zhiqiang, Zong Guanghua
2013, 39(3): 300-304.
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Abstract:
In order to provide precise load torque for testing the stiffness of rudder systems, a torque control system with the characteristics of high accuracy and large scale combining torque feedforward and rudder angle compensation was designed. The mathematical models of torque motor, torque motor driver...
Probabilistic design for blade-tip radial running clearance of HPT
Fei Chengwei, Bai Guangchen, Zhao Heyang, Han Yanbin
2013, 39(3): 305-309.
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Abstract:
To improve the blade-tip radial running clearance(BTRRC) design of aeroengine high pressure turbine(HPT), the probabilistic analysis of BTRRC was implemented based on deterministic analysis through considering the heat and mechanical loads of objects (disk, blade and casing) and selecting random var...
4D route rapidly planning based on route-segment tree
Zhang Xianfeng, Zhou Qizhong, Wang Changqing
2013, 39(3): 310-314.
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Abstract:
The launch time error and the random difference during flying will influence the arriving time of the unmaned combat aerial vehicles(UCAV). Based on the sparse A* algorithm, a route-segment tree was built with considerations of the moving characteristics of modern UCAV. The best leaf point was found...
Aerocaptureperiod under rotating atmospheric environment for Mars vehicle
Lü Jing, Zhang Mingming, Gong Shengping
2013, 39(3): 315-319,375.
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Abstract:
With regard to the human exploration of Mars, based on aerobraking, the dynamics equations for the Mars vehicle were established, both in the static and rotating atmospheric environment. Simulations of the flight databases were generated by a Matlab process based on a three-dimensional dynamic model...
Wing geometric twist design method based on lifting-line theory
Qiao Yuhang, Ma Dongli, Deng Xiaogang
2013, 39(3): 320-324.
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Abstract:
To meet the demand for reducing induced drag in aircraft design, a geometric twist design method for the wing was proposed, based on the research of three-dimensional wing induced drag in lifting-line theory. This method with input parameters of wing total lift, wing planar shape, airfoil aerodynami...
Coordinated task and resource allocation for multi-UAV based on probability collectives
Di Bin, Zhou Rui, Wu Jiang
2013, 39(3): 325-329.
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Abstract:
For the needs and characteristics of task and resource allocation in the scenario of multiple unmanned aerial vehicles(multi-UAV) collaborative target attacking, considering the constraints of the target value, the amount of ammunition restrictions and UAV payload, flight constraints etc, the mathem...
Confirmation and analysis on the optimal multiposition alignment of strapdown inertial navigation system
Liu Zhiqin, Wang Xinlong
2013, 39(3): 330-334.
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Abstract:
To realize precise alignment, the optimal multiposition alignment conditions and methods of strapdown inertial navigation system(SINS) were investigated. Using an equivalent error model of SINS established by Lyapunov transform, the observability of SINS error states was quantificationally analyzed ...
Dynamics modeling and tension analysis for a cable-driven humanoid-arm robot
Chen Weihai, You Xianqiang, Cui Xiang, Yu Shouqian
2013, 39(3): 335-339.
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Abstract:
Compared to the traditional robotic arm, the cable-driven humanoid-arm robot (CDHAR) similar to human muscles parallel drive mode is the hybrid structure of serial-parallel. However, the introduction of cables also increases the difficulty in dynamic analysis. CDHAR can be seen as a four-link serial...
Catastrophe analysis of the water mist fire suppression process
Yang Lijun, Tong Mingxi, Zhao Jianbo
2013, 39(3): 340-343.
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Abstract:
To understand the water mist fire suppression mechanism and find out the extinguishment boundary, the water mist fire suppression process was analyzed with a non-linear catastrophe theory. The expressions of the flame energy potential function and the flame critical extinguishing temperature were de...
Node splitting algorithm of R*-tree based on self-adaptation clustering
Sun Dianzhu, Sun Yongwei, Li Yanrui, Song Yang
2013, 39(3): 344-348.
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Abstract:
A node splitting algorithm of R*-tree based on self-adaptation clustering was proposed to improve the spatial query efficiency of the point cloud, triangle mesh and etc. Picking some data points as reference point set with uniform sampling. The true number of clusters, which made the totality compar...
Unknown input observer design based on auxiliary outputs
Zhu Fanglai, Wang Kun, Han Dong
2013, 39(3): 349-354.
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Abstract:
A design method of unknown input observer which is able to estimate simultaneously the system states and the unknown inputs was proposed when the observer matching condition is not satisfied. Based on the concept of relative degree with respect to unknown input, the auxiliary outputs were designed s...
Random PWM method based on pre-determined carrier frequencies
Wang Tingling, Xiong Junhua, Zhang Jin
2013, 39(3): 355-360.
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Abstract:
For reported random frequency pulse width modulation(PWM) methods, harmonic distortion appears in the output waveform because the relationship between the carrier frequencies and their changing frequency is not carefully considered. To cope with the above obstacle, the effect of carrier changing fre...
Design of multi-FPGAs processor based system for remote sensing image high-speed compression
Xu Xiaoshen, Jiang Hongxu, Xiao Chaosheng
2013, 39(3): 361-365.
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Abstract:
A design of multi-FPGAs for massive remote sensing image high-speed compression was proposed, which includes a hybrid multi-FPGAs based parallel processor architecture due to light coupling between modules and tight association of a single module; a compression mechanism for balanced data distributi...
Process of ducile-brittle transition of crystal brittle materials on ultra-precision machining
Wang Minghai, Wang Wei, Gao Lei
2013, 39(3): 366-370.
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Abstract:
By combination of fracture mechanics and dislocation mechanics, the method of simulating the process of ducile-brittle transition of brittle material based on the connection between macromechanics and micromechanics was discussed. The single crystal material mechanical property and crystal geometric...
Dynamical quality in bidirectional associative memory neural network model
Li Xiuling
2013, 39(3): 371-375.
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Abstract:
In order to study for the effect of delay in dynamic behavior of associative memory neural network model, an n+1-dimensional bidirectional associative memory (BAM) neural network model with multi-delay was considered. Sufficient conditions for nontrivial periodic solution were met by the model by ta...
Design of evaporator-condenser-separate mechanical vapor compression system
Wu Hong, Li Yulong, Chen Jiang
2013, 39(3): 376-380.
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Abstract:
An evaporator-condenser-separate mechanical vapor compression (MVC) system was presented, and the process of the new system was described. The thermal cycle model was established, and the thermodynamic parameters were optimized. In addition, measures to improve the efficiency of the system were prop...
Dish-Stirling power generation system performance prediction model and simulation analysis
Li Mingzhen, Dong Jinzhong
2013, 39(3): 381-385.
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Abstract:
A solar dish-Stirling system model was developed for design, optimization, control, and systems development of dish-Stirling systems. It modeled the energy transfer in parabolic concentrator and receiver, cycle thermodynamics and mechanical dynamics in Stirling engine and so on. The model's scope ex...
Robust consensus approach to high-order multi-agent systems based-on tree-type transformation
Cui Yan, Jia Yingmin
2013, 39(3): 386-390.
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Abstract:
Robust consensus control problem was studied for high-order multi-agent systems with the network under switching topologies by the tree-type transformation approach, through which the systems were turn into the reduced-order systems. After defining an appropriate controlled output, the consensus pro...
High accuracy method of ultrasonic gas leak direction detection　based on time delay estimation
Liao Pingping, Cai Maolin
2013, 39(3): 391-395.
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Abstract:
In order to solve the low accuracy problem in current gas leak detection, a new ultrasonic leak detection method based on time delay estimation (TDE) was proposed.Three ultrasonic sensors arranged in an equilateral triangle and received the ultrasound generated by a gas leak and the leak direction c...
Fiber-optic perimeter location system based on wavelet transformation
Zhong Xiang, Zhang Chunxi, Lin Wentai, Liang Sheng
2013, 39(3): 396-400.
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Abstract:
In order to improve the location accuracy of dual Mach-Zehnder interferometic based fiber-optic perimeter location system, the influence of signal frequency range and signal noise ratio (SRN) was analyzed and emulated. Basing on these, a fiber cable, which combines the high-sensitivity to vibration ...
Motion performance analysis of Rabbit rover with retractable-claw wheels
Yue Ronggang, Song Lingjun, Wang Shaoping
2013, 39(3): 401-405.
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Abstract:

To improve the climbing obstacles capability of a robot, a rover prototype named as Rabbit whose motion is based on 4 retractable-claw wheels was designed. Principle of the wheel, mobile system and control system of Rabbit were presented respectively, and some experiments were finished to test its p...
Sensitivity analysis of the factors affecting robot closed-chain positioning error
Qi Lizhe, Chen Lei, Wang Wei, Yu Leibin
2013, 39(3): 406-410.
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Abstract:
Aiming at the problem that is difficult to calibrate the robot positioning error accurately as many affecting factors, the closed-chain mathematical model for robot's positioning error was established based on Jacobian matrix firstly. Secondly, the formulas of single factor differential positioning ...
Globality-based uncorrelated linear extension of graph embedding for fault feature extraction
Tang Diyin, Yu Jinsong, Chen Xiongzi, Wang Honglun
2013, 39(3): 411-415.
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Abstract:
Systematic approach to extract the most effective information from original features is of great importance and efficiency for fault detection where physical modeling is highly difficult and the original features are highly dimensional and nonlinear. An algorithm named globality-based uncorrelated l...
Application of mixed-simulation for development of rolling resistance measurement system
Zhang Shaoguo, Gao Feng, Xu Guoyan, Cui Ying
2013, 39(3): 416-420.
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Abstract:
To ensure test data precision for rolling resistance, the key factors affecting equipment performance were assessed and predicted. Based on the equipment measuring principle, numerical simulation model for tire rolling resistance was established. Physical output quantity of sensor was collected and ...
Memory optimized parallel LDPC decoder architecture design on GPU
Ge Shuai, Liu Rongke, Hou Yi
2013, 39(3): 421-426.
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Abstract:
An optimized decoding architecture was proposed for low-density parity-check (LDPC) codes layered decoding algorithm based on Nvidia's Fermi graphic processing unit (GPU). In accordance with the parallelism characteristics in GPU hardware structure, inter-frame and intra-layer parallelization proces...

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