Results 191 to 200 of about 14,243 (235)
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Sensorless friction and gravity compensation
2014 IEEE-RAS International Conference on Humanoid Robots, 2014In this video we present a new controller for robots, called Zero-Friction Zero-Gravity control. The controllers combine terms for compensating the forces exerted by gravity, and the forces of friction of motors and reductions. The consequence of applying this control to a robot (a humanoid robot arm in this case) result in a free movement, as if the ...
Santiago Morante +3 more
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Sensorless-Oriented-Design of PM Motors
2007 IEEE Industry Applications Annual Meeting, 2007This paper deals with the design of a permanent-magnet (PM) motor for zero-speed sensorless rotor position detection, by means of injection of a high-frequency signal. Various aspects are investigated: influence of the rotor structure, stator and rotor saturation, reliability of finite-element analysis to predict the motor performance, and influence of
BIANCHI, NICOLA, BOLOGNANI, SILVERIO
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Sensorless Impedance Control for the UR5 Robot
2020 International Conference on Control, Automation and Diagnosis (ICCAD), 2020Robot manipulators are designed to interact with their surroundings. Even if a task does not specifically involve interaction, the robot may collide with unknown obstacles during its motion. To overcome these problems, it is necessary to consider possible interactions inside the control system.
Joao Fabian +3 more
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Sensorless In-Hand Caging Manipulation
2017In this paper, we study a method to manipulate objects in position-controlled robot hands: in-hand caging manipulation. In this method, an object is caged by a hand throughout manipulation and located around a goal as a result of the deformation of the cage without sensing the object configuration.
Yusuke Maeda, Tomohiro Asamura
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Sensorless fault diagnosis of induction motors
IEEE Transactions on Industrial Electronics, 2003Early detection and diagnosis of incipient faults is desirable for online condition assessment, product quality assurance, and improved operational efficiency of induction motors. In this paper, a speed-sensorless fault diagnosis system is developed for induction motors, using recurrent dynamic neural networks and multiresolution or Fourier-based ...
Kyusung Kim +2 more
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SMA sensorless actuators for micrometric control
2009 European Control Conference (ECC), 2009The ability of SMAs to respond reversibly to an external stimulus by modifying their dimensions can be used to generate motion or force in electromechanical devices and micro-machines. There are several works that demonstrate SMAs are serious alternatives as micrometric actuators, obtaining accuracies around 3 µm in position control if high-quality ...
Estibaliz Asua +3 more
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Research of sensorless controller of BLDC motor
IEEE 10th International Conference on Industrial Informatics, 2012Sensorless control technology has been a hotspot in the area of BLDCM control. In this paper, a speed controller of BLDCM based on MC56F8013 was researched using BEMF-crossing-zero-detecting method, including hardware circuit and software design. Experiments were implemented and it shows that the BEMF method for detecting rotor position signal is ...
Yuanlou Gao, Yongliang Liu
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Science Signaling, 2019
A metabolite of leucine regulates mTORC1 through acetylation of Raptor in certain cell types and tissues.
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A metabolite of leucine regulates mTORC1 through acetylation of Raptor in certain cell types and tissues.
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Sensorless speed control of induction motors
Proceedings of the 2004 American Control Conference, 2004We consider field-oriented speed control of induction motors without rotor position sensors. We augment the traditional approach with flux and speed observers and derive a sixth-order nonlinear model that describes the motor in field-oriented coordinates. The model takes into consideration the error in flux estimation.
Hassan K. Khalil, Elias G. Strangas
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IFAC Proceedings Volumes, 1989
Abstract The digital control of electrical drives by microprocessors requires special control concepts which are formed for digital signal processing. By implementing the well-known control strategies in the frequency domain and in the state space there are always two fundamental disadvantages; first the nonlinearities of a drive system cannot be ...
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Abstract The digital control of electrical drives by microprocessors requires special control concepts which are formed for digital signal processing. By implementing the well-known control strategies in the frequency domain and in the state space there are always two fundamental disadvantages; first the nonlinearities of a drive system cannot be ...
openaire +1 more source