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Lyapunov-Based Adaptive Control of Synchronous Generator with Exciter under Unknown mechanical power

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Lyapunov-Based Adaptive Control of Synchronous Generator wit...

Characteristics of mechanical and Electrical power Transmission for Small-Scaled Wind Turbine

第二十三届中国控制会议

作者： Xiaohong Jiao, Yuanzhang Sun Tielong Shen Department of Electrical Engineering, Tsinghua University, Beijing, 10084, China Department of mechanical Engineering, Sophia University, Tokyo, 102-8554, Japan

＜正＞ The stabilization of the power systems is dealt with in this paper based on the modern nonlinear techniques. A nonlinear excitation control is presented for the synchronous generator with dual exciters. First, for the case of the system with known mechanical power, it is shown that a state feedback stabilizing control law can be designed by a way of recursively constructing the Lyapunov function. And then, the proposed design method is extended to the case with unknown mechanical power. A nonlinear adaptive feedback control is designed that drives the system to the new equilibrium generated by the unknown mechanical power varied and the estimate of the mechanical power asymptotically converging to the correct value. Some simulation results are given to demonstrate the effectiveness of the proposed control schems.

关键词： Stabilization adaptive control synchronous generator mechanical power

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World Journal of Engineering and Technology 2016年第3期4卷 82-90页

作者： Kyu-Jin Lee Hyun-Dai Yang Sung-Hoon Park Sung-Do Song Byung-Sun Kim Joong-Ho Shin Department of mechanical Design and Manufacturing Changwon National University Changwon-si South Korea

Small-scaled wind turbine is converted to mechanical power of windmill to electric power by generator. However almost all studies seems to have overlooked converting relation of mechanical & electric power. It the reason for was very difficult establishing wind turbine system. In this paper, it is define equation of converting relation of mechanical & electric power. And it is verified by experimental methods. Defined equation will be used in developing electric devices such as inverter and controller in wind turbines. In addition this method can be used in the fields that utilize the rotational power into electrical power through generator.

关键词： Wind Turbine Generator mechanical power Electrical power

An Efficient Gait-generating Method for Electrical Quadruped Robot Based on Humanoid power Planning Approach

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Journal of Bionic Engineering 2021年第6期18卷 1463-1474页

作者： Lelai Zhou Tianfa Li Zaiyang Liu Yibin Li School of Control Science and Engineering Center for RoboticsShandong UniversityJinan250061China Engineering Research Center of Intelligent Unmanned System Ministry of EducationJinan250061China

The research field of legged robots has always relied on the bionic robotic research,especially in locomotion regulating approaches,such as foot trajectory planning,body stability regulating and energy efficiency *** energy consumption and keeping the stability of body are considered as two main characteristics of human *** work devotes to develop an energy-efficient gait control method for electrical quadruped robots with the inspiration of human walking *** on the mechanical power distribution trend,an efficient humanoid power redistribution approach is established for the electrical quadruped *** studying the walking behavior acted by mankind,such as the foot trajectory and change of mechanical power,we believe that the proposed controller which includes the bionic foot movement trajectory and humanoid power redistribution method can be implemented on the electrical quadruped robot *** stability and energy efficiency of the proposed controller are tested by the simulation and the single-leg prototype *** results verify that the humanoid power planning approach can improve the energy efficiency of the electrical quadruped robots.

关键词： Bionic robot mechanical power Bionic trajectory Quadruped robot

Metabolic cost of flight and aerobic efficiency in the rose chafer,Protaetia cuprea(Cetoniinae)

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Insect Science 2022年第5期29卷 1361-1372页

作者： Tomer Urca Eran Levin Gal Ribak School of Zoology Faculty of Life SciencesTel Aviv UniversityTel AvivIsrael Steinhardt Museum of Natural History Israel National Center for Biodiversity StudiesTel AvivIsrael

Rose chafer beetles(Protetia cuprea)are pollinators as well as agricultural pests,flying between flowers and trees while foraging for pollen and *** the energy they expend on flying during foraging activity faces the challenge of measuring the metabolic rate(MR)of free-flying insects in an open *** overcame this challenge by using the bolus injection of ^(13)C Na-bicarbonate technique to measure their metabolic energy expenditure while flying in a large flight ***,we tracked the insects with high-speed cameras to extract their flight trajectory,from which we calculated the mechanical power invested in flying for each flight *** found that the chemical(metabolic)energy input converted to mechanical flight energy output at a mean efficiency of 10.4%±5.2%,with a trend of increased efficiency in larger conspecifics(efficiency scaled with body mass to the power of 1.4).The transition in the summer from a diet of pollen to that of fruits may affect the energy budget available for *** ***,feeding on apples ad libitum,increased their body mass by an average of 6%in 2 *** to our calculations,such a meal can power a 630-m flight(assuming a carbohydrate assimilation efficiency of 90%).Pollen,with a low water and carbohydrate content but rich in proteins and lipids,has a higher caloric content and should assimilate differently when converting food to flight *** high cost of aerial locomotion is inherent to the foraging behavior of rose chafers,explaining their short flight bouts followed by prolonged feeding activity.

关键词： aerobic eficieney bolus injection of^(13)C-Na-bicarbonate feeding capacity flight metabolic rate flower chafer bele free flight mechanical power

Relationships Between Vertical Jump Metrics and Sprint Performance,and Qualities that Distinguish Between Faster and Slower Sprinters

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Journal of Science in Sport and Exercise 2022年第2期4卷 135-144页

作者： Jad Adrian Washif Lian-Yee Kok High-Performance Branch Sports Performance DivisionNational Sports Institute of MalaysiaNational Sports ComplexBukit Jalil57000 Kuala LumpurMalaysia Department of Sport Science Tunku Abdul Rahman University CollegeKuala LumpurMalaysia

Purpose This study aimed to investigate the relationships between vertical jump metrics and phases during a 60 m *** variances in strength qualities between sprinters of different ability levels were also *** Eighteen young male elite sprinters(age:18.1±1.3 years;stature:1.72±0.07 m;body mass:66.3±6.2 kg)were assessed for squat(SJ),countermovement(CMJ),drop(DJ),and standing long jumps,a maximal load back-squat,and a 60-m sprint from a *** relationships between sprint performances with all variables were analysed using correlation and multiple regression while discriminative parameters between fast(100 m time:~10.50 s)and slow(~11.00 s)sprint groups were assessed using independent *** Higher associations existed between vertical jumps and longer sprint distances,especially between SJ height and relative peak power with 10 m(r=−0.47 and−0.47,respectively),30 m(−0.71 and−0.74),60 m(−0.76 and−0.81),10-30 m(−0.80 and−0.86),and 30-60 m(−0.78 and−0.84)sprint ***,variables such as relative maximal-strength,relative SJ parameters(height,peak force,and peak power),relative CMJ peak power,and reactive strength index(DJ from 35 cm height)had significant discriminative ability and correlations(Ppower,and reactive strength seem necessary to improve sprint performance in young male elite sprinters.

关键词： Acceleration mechanical power Maximum strength Neuromuscular abilities Reactive strength Track and field