Nowadays, robotic systems are an integral part of many orthopedic interventions. Stationary robots improve the accuracy but also require adapted surgical workflows. Handheld robotic devices (HHRDs), however, are easil...
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Traffic signal control algorithms of a traffic network are presented using a hierarchical control concept. The traffic congestion mechanism is described quantitatively based on the traffic volume balance at each signa...
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Traffic signal control algorithms of a traffic network are presented using a hierarchical control concept. The traffic congestion mechanism is described quantitatively based on the traffic volume balance at each signalized intersection. The traffic signal control system of the traffic congestion length is described by a linear time-varying discrete dynamic system in the traffic network. The hierarchical traffic signal control algorithm using the priority control algorithm is presented and simulated at twelve signalized intersections of the traffic network.
Various control algorithms, available within a microcomputer, tailored to the respective predominant demands are selected according to a control strategy that different algorithms may complement each other favourably ...
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Various control algorithms, available within a microcomputer, tailored to the respective predominant demands are selected according to a control strategy that different algorithms may complement each other favourably for improving the overall performance of an electrical drive system. The investigations cover the objectives to follow new reference settings of a speed control system rapidly with minimum overshoot and small settling time and rejecting load disturbances effectively. The experimental results are in agreement with the theoretical expectations and allow the conclusion that the system may meet the requirements for a number of practical applications.
Magnetic journal bearings are coming into increasing use in industry today. They are primarily used to replace either rolling element or fluid film bearings in rotating machinery. The major advantages are elimination ...
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Magnetic journal bearings are coming into increasing use in industry today. They are primarily used to replace either rolling element or fluid film bearings in rotating machinery. The major advantages are elimination of oil systems and associated seals, expected very long life, very low power losses, and great potential for vibration reduction. Disadvantages include lack of field experience, unknown reliability over a long time, high cost (so far primarily due to the small quantity being made for a given application), and advanced automatic control design required. This paper discusses the design of a magnetic journal bearing with four electromagnets arranged radially around a shaft to fully support a rotor. Each electromagnetic is connected to a controlling electronics circuit which regulates the current to the magnet. For the measurements presented here, only the top magnet was tested and the shaft was not rotating. Thus a single control algorithm was isolated from other effects. This paper compares two control algorithms with differing circuit band widths of 1.2 kHz and 50 kHz. The wider bandwidth algorithm produced approximately a sixfold increase in magnetic bearing stiffness and a much greater stable operating region compared to the lower bandwidth algorithm. Overall, the calculated effective stiffness and damping coefficients were within 20 to 30 percent of the measured values.
The present paper investigates the impact of advanced control algorithms on harnessing building energy flexibility in a smart-grid ready full-electric residential building. The impact on thermal comfort is also analys...
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The present paper investigates the impact of advanced control algorithms on harnessing building energy flexibility in a smart-grid ready full-electric residential building. The impact on thermal comfort is also analysed. The building is located in Ireland and is equipped with a geothermal heat pump and a thermal energy storage system. Two Energy Management systems, based on rule-based and intelligent optimisation algorithm approaches, are developed which use real-time building smart meter and weather data. This data is utilised by various dynamic flexibility metrics within the respective control algorithms. Different time of use tariffs, based on data from the Irish Commission for Energy Regulation and structured on the basis of peak, off-peak and night periods, are also used. Results show that energy cost reductions of up to 21% and 43% can be achieved by the rule-based and intelligent algorithm, respectively, without compromising the thermal comfort within the building. Moreover, total shifting and forcing flexibility potential of up to 34 and 54 kWh, respectively, based on the month of January, can be achieved by the adoption of the intelligent control algorithm.& COPY;2021 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://***/licenses/by-nc-nd/4.0/).
In this paper a comparative study of four different control algorithms(instantaneous power theory (p-q), power balance theory (PBT), Icos phi theory and synchronous current detection method (SCDM) of a three- phase th...
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ISBN:
(纸本)9781538609903
In this paper a comparative study of four different control algorithms(instantaneous power theory (p-q), power balance theory (PBT), Icos phi theory and synchronous current detection method (SCDM) of a three- phase three wire shunt active power filter (SAPF) for non-linear loads is presented for power quality improvement. With all algorithms, the control generates a reference current and compared with filter injected current through a current controller where the current controller uses sinusoidal pulse width modulation technique for generating six pulses to drive IGBT to make the source current sinusoidal and reduce the total harmonic distortion (THD) less than 5% for meeting the IEEE standard. The simulation results demonstrate that the Icos phi algorithm gives the best reduction of THD compared with other algorithms.
Using vehicle dynamics, in this paper an automotive ABS control algorithms, which adaptive to the adhesive coefficient of road surface was proposed. And also an ABS experiment bench was explored. Simulation and exp...
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Using vehicle dynamics, in this paper an automotive ABS control algorithms, which adaptive to the adhesive coefficient of road surface was proposed. And also an ABS experiment bench was explored. Simulation and experiment studies results show that this ABS system can control the wheel slip well and the control effect is good, it provides an effective method of ABS research.
Using vehicle dynamics,in this paper an automotive ABS control algorithms,which adaptive to the adhesive coefficient of road surface was *** also an ABS experiment bench was *** and experiment studies results show tha...
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Using vehicle dynamics,in this paper an automotive ABS control algorithms,which adaptive to the adhesive coefficient of road surface was *** also an ABS experiment bench was *** and experiment studies results show that this ABS system can control the wheel slip well and the control effect is good,it provides an effective method of ABS research.
One challenge in the use of semi-active technology is in developing nonlinear control algorithms that are appropriate for implementation in full-scale *** on the basic characteristics of magnetorheological(MR) damper,...
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One challenge in the use of semi-active technology is in developing nonlinear control algorithms that are appropriate for implementation in full-scale *** on the basic characteristics of magnetorheological(MR) damper,the structural control algorithms are *** nonlinear control algorithms are systematically reviewed from the aspects including clipped optimal control,LQR control, and Lyapunov stability ***,the existed problem in application and the future developing in research on the structural control algorithms are summarized respectively.
First, the basic structure and principle of quadrotor UAV and its practical applications are introduced. Then, some control algorithms are also presented, such as, PID, LQR/LQG, H, sliding mode,feedback linearization,...
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First, the basic structure and principle of quadrotor UAV and its practical applications are introduced. Then, some control algorithms are also presented, such as, PID, LQR/LQG, H, sliding mode,feedback linearization, back stepping, model predictive,robust, adaptive, nested saturation, fuzzy logic, neural network, reinforcement learning, iterative learning,memory and brain emotional learning-based intelligent controllers, and the merits and drawbacks of them are analyzed. At last, we predict the main research direction on the future researches of quadrotor UAV.
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