Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 17 of 17 for “"chattering"”.
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Sliding Mode Control with Chattering Reduction
… nature of the control law introduces the chattering phenomenon, which leads to potential actuator degradation, alterations to the desired response characteristics and, sometimes, instability during control implementation. The main objective of this thesis is to study Sliding Mode Control …
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Aircraft cruise performance optimization using chattering controls
… to investigate fuel-range optimal trajectories. Chattering controls are considered appropriate when the hodograph is non-convex. Classical steady-state cruise, simple chattering-cruise and the extended chattering-cruise models are studied as constrained parameter-optimization problems. The term …
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Disturbance accommodation in linear systems with chattering controllers
Electronic Thesis or Dissertation
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Cruise-dash optimization applied to an air-breathing missile
… throttle setting and the resultant throttle-chattering on the solution of the control problem is examined in some detail.
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Terminal sliding mode control for rigid robotic manipulators with uncertain dynamics
… Both laws are extended to include a reduction of chattering by use of the boundary layer technique. They are tested via application to a two-link robot simulated using MatLab.
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First Order Dynamic Sliding Mode Control of a Wind Turbine with Optimized Tip Speed Ratio
… it at the optimal TSR for maximum power without chattering. The study revealed the RLS's effectiveness in determining optimal TSR on wind turbine models. The FODSMCI enables a balance between controller performance and rotor speed tracking, yielding a chatter-free response.
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Optimal symmetric flight with an intermediate vehicle model
… vertical flight and including a limiting "chattering" member.
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Real-Time Moment Rate Constrained Control Allocation for Aircraft with a Multiply-Redundant Control Suite
… in earlier batch simulation, such as control chattering due to restoring and apparent control wind-up, are investigated and an evaluation is made of the overall feasibility of these algorithms. The purpose of the research is to confirm that the results obtained from batch simulation testing …
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Decentralized Synergetic Control of Power Systems
… But the latter technique introduces steady state chattering effect which can cause wear and tear in actuating system. This gives the proposed technique a major advantage over the SMC. In this work, the method is employed for systems with multi machine. Each of the machines is considered to be a …
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DEVELOPMENT OF ADAPTIVE ROBUST SCHEMES FOR NONLINEAR UNCERTAIN SYSTEMS
… noise, and meanwhile significantly reduce the chattering to achieve much smooth derivative estimation in comparison with the existing variable structure derivative estimator. Finally, in the fifth technical part , a comparative study is made on control schemes suitable for PMS motors. Adaptive …
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A room of one's own, revisited: An existential-hermeneutic study of female solitude
… to listen beyond the human conversation and the chattering of their own minds, developed a more sacred relationship to language, confronted their emotional "demons, " and found themselves increasingly drawn toward the poetic. Overall, through their solitudes, the women developed a greater stance …
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Model-based powertrain design and control system development for the ideal all-wheel drive electric vehicle
… the existing issues, including torque windup and chattering of the slipping wheel. In addition, the verification shows that the IAWDEV can harvest around two times more energy while the vehicle is running on slippery roads than the TCAWDEV and the dual-axle AWDEV; the traction control can achieve …
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Mutualism between honeyguides, beekeepers and honey-hunters in the southern highlands of Tanzania
… with humans. Honeyguides use a specialised chattering call to guide honeyhunters to bees' nests, which honey-hunters harvest with the help of smoke and tools. Honey-hunters increase their harvesting yield by finding bees' nests with the help of honeyguides, and honeyguides feed on leftover …
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Understanding the mutualistic interaction between greater honeyguides and four co-existing human cultures in northern Tanzania
… one tree to another while giving a distinctive chattering call, in the direction of a wild bees' nest. This relationship is mutually beneficial: the hunters harvest valuable honey, and the honeyguides feed on the beeswax leftover from the harvest. In northern Tanzania, multiple human cultural …
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Experimental sliding mode control of a flexible single link manipulator
… implementation and solve the undesirable "chattering" in conventional VSS control, another novel controller design method is developed, i.e., the Discrete-time Quasi-Sliding Mode Control(DQSMC). This design is proposed based on a re-visit to the necessary and sufficient conditions for the …
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A REGION-SENSITIVE FUZZY LOGIC CONTROLLER FOR pH
… was found to be stable, while control valve chattering was observed in the case of SFLC under certain disturbance conditions. Besides, SFLC was not successful in restoring the process to its set point in some cases. Regarding the AIMC, in general, it showed significantly higher settling time …
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Aktive Sekundärmaßnahmen zur Vermeidung von fahrzustandsabhängigen Geräuschen in hydraulischen Lenksystemen
In hydraulic power steering systems of motor vehicles, often unintended acoustic phenomena can result from certain driving situations. The acoustic phenomenon known as “rattling” is generated by impacts on the steering cylinder, if the car rides over bumps, kerb stones or similar obstacles. In …