International Journal of Automation and Computing
http://www.ijac.net
A Comparison of Mamdani and Sugeno Fuzzy Based Packet Scheduler for MANET with a Realistic Wireless Propagation Model
http://www.ijac.net/en/article/id/58420bd2-ab8c-4c0c-916f-566ca8fff255
121113
Oche Alexander Egaji, Alison Griffiths, Mohammad S. Hasan, Hong-Nian Yu
Implementation of Envelope Analysis on a Wireless Condition Monitoring System for Bearing Fault Diagnosis
http://www.ijac.net/en/article/id/6e49cd98-e927-4494-8869-9cbda2f0ae89
1211424
Guo-Jin Feng, James Gu, Dong Zhen, Mustafa Aliwan, Feng-Shou Gu, Andrew D. Ball
Model-based and Fuzzy Logic Approaches to Condition Monitoring of Operational Wind Turbines
http://www.ijac.net/en/article/id/8cc564e3-b76c-4a7e-86fa-4c5821c0f61f
1212534
Philip Cross, Xiandong Ma
Recursive Filter with Partial Knowledge on Inputs and Outputs
http://www.ijac.net/en/article/id/3608daf6-ce76-4cf8-8d8a-5c3b28ea9927
1213542
Jinya Su, Baibing Li, Wen-Hua Chen
Flexible Strip Supercapacitors for Future Energy Storage
http://www.ijac.net/en/article/id/a27dcb9c-5b43-40cc-b105-0a34118f2eb6
1214349
Rui-Rong Zhang, Yan-Meng Xu, David Harrison, John Fyson, Fu-Lian Qiu, Darren Southee
Observer Design—A Survey
http://www.ijac.net/en/article/id/251e66a4-2010-4d12-a4c0-4aab20ccc342
Kx(t) signal where K is a constant and x(t) is the state vector of the OLS. Thus, an observer can be used as a feedback controller that implements state feedback control (SFC) or Kx(t)-control, and observer design is therefore utterly important in all feedback control designs of state space theory. In this survey, the observer design results are divided into three categories and for three respective main purposes. The first category of observers estimate signal Kx(t) only with a given K, and this survey has four conclusions: 1) Function observer that estimates Kx(t) directly is more general than state observer that estimates x(t), and may be designed with order lower than that of state observer, and the additional design objective is to minimize observer order; 2) The function observer design problem has already been simplified to the solving of a single set of linear equations only while seeking the lowest possible number of rows of the solution matrix, and an apparently most effective and general algorithm of solving such a problem can guarantee unified upper and lower bounds of the observer order; 3) Because such a single set of linear equations is the simplest possible theoretical formulation of the design problem and such theoretical observer order bounds are the lowest possible, and because the general, simple, and explicit theoretical formula for the function observer order itself do not exist, the theoretical part of this design problem is solved; 4) Because the function observer order is generically near its upper bound, further improvement on the computational design algorithm so that the corresponding observer order can be further reduced, is generically not worthwhile. The second category of observers further realize the loop transfer function and robustness properties of the direct SFC, and the conclusion of this survey is also fourfold: 1) To fully realize the loop transfer function of a practically designed Kx(t)-control, the observer must be an output feedback controller (OFC) which has zero gain to OLS input; 2) If parameter K is separately designed before the observer design, as in the separation principle which has been followed by almost all people for over half of a century, then OFC that estimates Kx(t) does not exist for almost all OLS s; 3) As a result, a synthesized design principle that designs an OFC first and is valid for almost all OLS s, is proposed and fully developed, the corresponding K will be designed afterwards and will be constrained by the OFC order as well as the OFC parameters; 4) Although the Kx(t)-control is constrained in this new design principle and is therefore called the "generalized SFC" (as compared to the existing SFC in which K is unconstrained), it is still strong enough for most OLS's and this new design principle overcomes many fundamental drawbacks of the existing separation principle. The third category of observers estimate Kx(t) signal at special applications such as fault detection and identification and systems with time delay effects. Using directly the result of OFC that estimates Kx(t) of the second category, these observers can be generally and satisfactorily designed.]]>1215061
Chia-Chi Tsui
Selection of Suitable Maximum-heart-rate Formulas for Use with Karvonen Formula to Calculate Exercise Intensity
http://www.ijac.net/en/article/id/d53afa4a-efc5-49ca-846d-ff34d7319579
HR_{max}, as a variable. This study employed pedaling experiments to assess which of the proposed formulas for calculating HR_{max} was the most suitable for use with the Karvonen formula. First, two kinds of experiments involving an ergometer were performed: an all-in-one-day experiment that tested eight pedaling loads in one day, and a one-load-per-day experiment that tested one load per day for eight days. A comparison of the data on 7 subjects showed that the all-in-one-day type of experiment was better for assessing HR_{max} formulas, at least for the load levels tested in our experiments. A statistical analysis of the experimental data on 47 subjects showed two of the HR_{max} formulas to be suitable for use in the Karvonen formula to estimate exercise intensity for males in their 20 s. In addition, the physical characteristics of a person having the greatest impact on exercise intensity were determined.]]>1216269
Jinhua She, Hitoshi Nakamura, Koji Makino, Yasuhiro Ohyama, Hiroshi Hashimoto
Grey Qualitative Modeling and Control Method for Subjective Uncertain Systems
http://www.ijac.net/en/article/id/db5aeb19-e305-4a29-9c49-1afcd3f2f65a
1217076
Peng Wang, Shu-Jie Li, Yan Lv, Zong-Hai Chen
Bandwidth Allocation with Minimum Rate Constraints in Cluster-based Femtocell Networks
http://www.ijac.net/en/article/id/75194e5b-85c9-4d65-ae14-8a33722a0a01
1217782
Kai Ma, Liang Li, Jie Yang, Zhi-Xin Liu, Xin-Bin Li, Xin-Ping Guan
A Robust Tracking Controller for Electrically Driven Robot Manipulators: Stability Analysis and Experiment
http://www.ijac.net/en/article/id/98c42d08-9d4b-4baf-bf0f-4bcbf6d27077
1218392
Mohamadreza Homayounzade, Mehdi Keshmiri, Mostafa Ghobadi
Detection of Impending Vehicle Rollover with Road Bank Angle Consideration Using a Robust Fuzzy Observer
http://www.ijac.net/en/article/id/a13d78a2-687a-4be5-b4ca-d903b3ce8adf
12193101
Hamid Dahmani, Mohammed Chadli, Abdelhamid Rabhi, Ahmed El Hajjaji
On Improved Delay-dependent Robust Stability Criteria for Uncertain Systems with Interval Time-varying Delay
http://www.ijac.net/en/article/id/ada364c5-cc16-40d1-a43e-6e5a57cd7cf2
121102108
Jun-Jun Hui, He-Xin Zhang, Xiang-Yu Kong, Xin Zhou
Delay-dependent Non-fragile <i>H</i><sub>∞</sub> Control for Linear Systems with Interval Time-varying Delay
http://www.ijac.net/en/article/id/59d02d05-19e7-4dae-b9e5-df42aca0698f
H_{∞} control for a class of linear systems with interval time-varying delay. Based on the direct Lyapunov method, an appropriate Lyapunov-Krasovskii functional (LKF) with triple-integral terms and augment terms is introduced. Then, by using the integral inequalities and convex combination technique, an improved H_{∞} performance analysis criterion and non-fragile H_{∞} controller are formulated in terms of linear matrix inequalities (LMIs), which can be easily solved by using standard numerical packages. At last, two numerical examples are provided to demonstrate the effectiveness of the obtained results.]]>121109116
Jun-Jun Hui, He-Xin Zhang, Xiang-Yu Kong