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Bin Jiang,Mo-Shu Qian,Hugh Hong-Tao Liu 제어·로봇·시스템학회 2016 International Journal of Control, Automation, and Vol.14 No.3
In this paper, an active fault tolerant control (FTC) approach based on transient performance index isproposed for the attitude control systems of unmanned aerial vehicle (UAV) with actuator fault. The nonlinearattitude control system model for UAV with actuator faults is given, which represents the dynamic characteristicsof UAV. A fault diagnosis component is used for fault detection and estimation. According to the fault estimationinformation obtained during the fault diagnosis, the fault tolerant control scheme is developed by adopting theadaptive dynamic surface control technique, which guarantees the asymptotic output tracking and ultimate uniformboundedness of the closed-loop attitude control systems of UAV in actuator faulty case. Further, a prescribedtransient performance of the FTC attitude control systems is considered which characterizes the convergence rateand maximum overshoot of the attitude tracking error. Finally, simulation results are shown that the attitude controlsystem states remain bounded and the output tracking errors converge to a neighborhood of zero.
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Wang, Zhang‐,qian,Perumalsamy, Haribalan,Wang, Mo,Shu, Shaohua,Ahn, Young‐,Joon John Wiley Sons, Ltd 2016 Pest Management Science Vol.72 No.5
<P><B>Abstract</B></P><P><B>BACKGROUND</B></P><P><I>Anopheles sinensis</I>, <I>Aedes aegypti</I> and <I>Aedes albopictus</I> and <I>Culex pipiens pallens</I> mosquitoes transmit malaria, dengue fever and West Nile virus diseases respectively. This study was conducted to determine the toxicity of 17 constituents from <I>Magnolia denudata</I> seed hydrodistillate (MD‐SHD) and four experimental MD‐SHD liquid formulations (10–50 mg L<SUP>−1</SUP> liquid) to third‐instar larvae from insecticide‐susceptible <I>Cx. p. pallens</I> and <I>Ae. aegypti</I> as well as wild <I>Ae. albopictus</I> and <I>An. sinensis</I>.</P><P><B>RESULTS</B></P><P>2,4‐Di‐<I>tert</I>‐butylphenol was the most toxic constituent (LC<SUB>50</SUB> 1.98–3.90 mg L<SUP>−1</SUP>), followed by linoleic acid (7.19–10.49 mg L<SUP>−1</SUP>), towards larvae of the four mosquito species. High toxicity was also produced by nerolidol, (±)‐limonene, <I>α</I>‐terpinene and <I>γ</I>‐terpinene (LC<SUB>50</SUB> 9.84–36.42 mg L<SUP>−1</SUP>). The toxicity of these compounds was virtually identical towards larvae of the four mosquito species, even though <I>An. sinensis</I> larvae were resistant to deltamethrin and temephos. The MS‐SHD 50 mg L<SUP>−1</SUP> liquid resulted in 92–100% control towards larvae of the four mosquito species, while commercial temephos 200 g L<SUP>−1</SUP> emulsifiable concentrate was almost ineffective towards <I>An. sinensis</I> larvae (30% mortality).</P><P><B>CONCLUSION</B></P><P>Reasonable mosquito control in the aquatic environment can be achieved by MD‐SHD 50 mg L<SUP>−1</SUP> liquid as a potential larvicide. © 2015 Society of Chemical Industry</P>
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Active Fault Tolerant Control Scheme for Satellite Attitude Systems: Multiple Actuator Faults Case
Zhi-Feng Gao,Zepeng Zhou,Guoping Jiang,Mo-Shu Qian,Jin-Xing Lin 제어·로봇·시스템학회 2018 International Journal of Control, Automation, and Vol.16 No.4
In this paper, an active fault tolerant control (FTC) design approach is proposed for the satellite attitude systems with exogenous disturbance and multiple actuator faults. Firstly, the nonlinear attitude system model of rigid satellite with multiple actuator faults is given. Next, an actuator fault diagnosis scheme, including a fault detection module and a fault estimation module, is given so as to detect the time of unknown actuator faults occurred and obtain their estimation values. Then, a terminal sliding mode-based fault tolerant attitude controller is designed using backstepping control technique, which guarantees that the closed-loop attitude systems of rigid satellite are asymptotically stable in the presence of multiple actuator faults. Numerical simulations illustrate the good performance of active FTC proposed in this study.
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