Yu Yao's research while affiliated with Nanjing University of Aeronautics & Astronautics and other places
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Publications (9)
As a regenerated turbulent wind field process, wind tunnel test has proven to be a promising approach for investigating the transmission tower-line system (TTLS) performance in view of experimental scaled models design, simulation techniques of wind field, and wind induced responses subjected to typhoon. However, the challenges still remain in usin...
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The development of a method to simulate desired approach turbulence characteristics and improve the typhoon resistance ability for complex building and transmission tower-line system (TTLS) in a multiple controlled fan wind tunnel (MCFWT) is described. A case study is investigated using a closed-circuit single controlled fan wind tunnel model of th...
A complete and systematic procedure for the dynamical parameters identification of industrial robot manipulator is presented. The system model of robot including joint friction model is linear with respect to the dynamical parameters. Identification experiments are carried out for a 6-degree-of-freedom (DOF) ER-16 robot. Relevant data is sampled wh...
The purpose of this paper is devoted to developing a chaotic artificial bee colony algorithm (CABC) for the system identification of a small-scale unmanned helicopter state-space model in hover condition. In order to avoid the premature of traditional artificial bee colony algorithm (ABC), which is stuck in local optimum and can not reach the globa...
Singularity analysis is a basic problem of parallel mechanism, and this problem cannot be avoided in both workspace and motion
planning. How to express the singularity locus in an analytical form is the research emphasis for many researchers for a long
time. This paper presents a new method for the singularity analysis of the 6-SPS parallel mechani...
In order to study the forward kinematics analysis of 6-3 Stewart parallel mechanisms, this paper presents a new analytical
method. Analyzing the coupling relationships between the position and orientation variables of the moving platform, additional
useful information is obtained, thus eleven compatible algebra equations used to solve this problem...
The kinematics analysis method of a novel 3-DOF wind tunnel mechanism based on cable-driven parallel mechanism is provided. Rodrigues' parameters are applied to express the transformation matrix of the wire-driven mechanism in the paper. The analytical forward kinematics model is described as three quadratic equations using three Rodridgues' parame...
Spatial transformation operator of multibody system dynamic based on spatial operator algebra is described by using screw theory based on Newton-Euler method and its characteristic is analyzed. Describing of the structure and calculation of the force is achieved at the same time, so it avoids the across calculation and unnecessary integral calculat...
Citations
... The typhoon profile is related to topography, atmospheric humidity, surface roughness, atmospheric stability, Coriolis force, and other factors. Wind engineers have studied wind field characteristics through methods such as field measurements [2,3], numerical simulations [4,5], and wind tunnel tests [6,7]. ...
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... Wind tunnel wind speed control system developed with the development of electronic technology, before 1990s, mainly manual and semi-automatic, through manual operation of each operating valve or in the dynamic frequency converter to achieve wind speed control [8].According to the current research situation of wind speed control system in domestic wind tunnel, the power system and control system are regarded as a whole, the automation degree of wind speed control is not high, and most of them use open loop to control wind speed. When wind tunnel wind speed is disturbed by external uncertain factors, it can not automatically mediate and control in real time. ...
... Because the data would be fluctuation due to start-stop operations, the first and last series of the seven series of collected data of joint angular velocity, joint torque, and power during robot motion mentioned above should be discarded. Only the data from the stable middle 5 motion cycles should be retained [25]. During the experiment, due to environmental interference and factors related to the equipment itself, the collected data contains some noise. ...
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... Then, Eqs. (42) and (43) are used to perform five-point cubic smoothing on the sampled data [26]. ...
... As a consequence, singularities must be identified during design and avoided during functioning, that is, singularity analysis is a mandatory step to implement at the design stage, which justifies the ample literature (see, for instance, Refs. [20][21][22][23][24][25][26][27][28][29][30][31]) on mechanisms' singularity analysis. ...
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