Primary-side sensing (PSS) technique can be used for output voltage or current regulation by employing an auxiliary winding for the sensing of the output voltage without using an additional opto-coupler for output fee...
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The paper presents a methodology of compensating for time-delayed effects in tele-operated controlsystems. Compensation can be done by neural network. The tele-operated system consists of a master robot to give comma...
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A 3 Degree of Freedom Rotary Table is a robotic mechanism which brings about rotational movements. This mechanism helps to make a movement scenario in order to test Guidance and Navigation systems of moving vehicles. ...
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ISBN:
(纸本)9781424433148
A 3 Degree of Freedom Rotary Table is a robotic mechanism which brings about rotational movements. This mechanism helps to make a movement scenario in order to test Guidance and Navigation systems of moving vehicles. It has complicated dynamic equations. Having these equations in hand is crucial for control objectives. It is shown that we have obtained these equations by applying the Newton's Second Law for Rotation instead of using common methods in robotic modeling such as Denavit-Hartenberg and Newton-Euler methods. We have extracted full dynamic equations that contain all designing parameters such as Moment of Inertia factor in all round and even the unbalanced and wobble effect. Finally we have verified obtained equations by simulating them in MATlab.software.
This paper presents a mixed-signal power-factorcorrection (PFC) control IC for the single-phase criticalconduction-mode (CRM) boost AC/DC converters. The peak current mode control is used and realized by using the ana...
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This paper presents a practical design method for the critical-conduction mode power factor correction (CRM PFC) converter by using an interactive mathematical computation and documentation software, the MathCAD. Many...
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This paper presents a mixed-signal power-factor-correction (PFC) control IC for the single-phase critical-conduction-mode (CRM) boost AC/DC converters. The peak current mode control is applied and analyzed by using th...
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ISBN:
(纸本)9781424441662
This paper presents a mixed-signal power-factor-correction (PFC) control IC for the single-phase critical-conduction-mode (CRM) boost AC/DC converters. The peak current mode control is applied and analyzed by using the analog circuit. The voltage control loop is implemented in digital approach. This paper analyzes effect of the hysteresis band effect of the analog current comparator in current loop. In digital voltage loop, the proper quantization resolutions both ADC and DAC are determined. The digital voltage controller uses a digital notch filter to achieve fast dynamic response and a low total-harmonic-distortion (THD) with high power factor (PF). A load adaptive control scheme to maintain same dynamic response of the output voltage at different load conditions change. The proposed mixed-signal PFC control scheme has been verified by using computer simulation with experimental results to validate feasibility.
This paper presents a digital control scheme for boost power-factor- correction (PFC) AC/DC converters to achieve both low total-harmonic-distortion (THD) and fast dynamic response under large load variations. Compare...
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This paper proposes a modeling method for characterization of single-phase brushless dc (BLDC) fan motors in applications to information appliances. The nonlinear back-EMF induced by the rotor flux with stator winding...
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The least squares support vector regression (LS-SVR) is usually used for the modeling of single output system, but it is not well suitable for the actual multi-input-multi-output system. The paper aims at the modeling...
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The least squares support vector regression (LS-SVR) is usually used for the modeling of single output system, but it is not well suitable for the actual multi-input-multi-output system. The paper aims at the modeling of multi-output systems by LS-SVR. The multi-output LS-SVR is derived in detail. To avoid the inversion of large matrix, the recursive algorithm of the parameters is given, which makes the online algorithm of LS-SVR practical. Since the computing time increases with the number of training samples, the sparseness is studied based on the pro-jection of online LS-SVR. The residual of projection less than a threshold is omitted, so that a lot of samples are kept out of the training set and the sparseness is obtained. The standard LS-SVR, nonsparse online LS-SVR and sparse online LS-SVR with different threshold are used for modeling the isomerization of C8 aromatics. The root-mean-square-error (RMSE), number of support vectors and running time of three algorithms are compared and the result indicates that the performance of sparse online LS-SVR is more favorable.
Globally, civil infrastructures are deteriorating at an alarming rate caused by overuse, overloading, aging, damage or failure due to natural or man-made hazards. With such a vast network of deteriorating infrastructu...
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