Vector control has improved the performance and energy efficiency in SPIM drives. However, high current and torque pulsations are produced by winding asymmetry of SPIM. This paper proposes a decoupling scheme to reduc...
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ISBN:
(纸本)9781467324199
Vector control has improved the performance and energy efficiency in SPIM drives. However, high current and torque pulsations are produced by winding asymmetry of SPIM. This paper proposes a decoupling scheme to reduce the current and torque pulsations and improve the performance of vector control. A stator current observer is used to estimate the coupling signals, which are compensated by control law. This method is an alternative to improve the performance of single-phase induction motor used in hermetic refrigeration systems. The thermal efficiency of refrigeration system can be improved by the variable speed operation and the advantages of robustness and low-cost of single-phase induction motor can be maintained.
In the design of cockroach robots, a major requirement is to increase the carrying capacity of the robots. This paper proposes a novel configuration for the leg design of cockroach robots. In this configuration, the o...
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ISBN:
(纸本)9781424487554
In the design of cockroach robots, a major requirement is to increase the carrying capacity of the robots. This paper proposes a novel configuration for the leg design of cockroach robots. In this configuration, the operating principle of a differential gear in a car is used in the design of multi-legged robots, so the carrying capacity is doubled at the same situation, compared with conventional linkage based robots. Firstly, the movement performance of the mechanism, including the inverse kinematics is analyzed and a decoupling algorithm is presented to control the prototype. Secondly, the working space and carrying capacity is calculated and analyzed. Then the whole model is simulated by the combination of MATLAB and ADAMS. The result of the simulation shows an improved performance, which indicates that the mechanism design is reasonable and the analysis is correct.
One deformable mirror (DM) in conventional adaptive optics system can not meet the needs of large scale and high order aberration compensation. In this paper, a dual DMs way is presented, which needs the decoupling ...
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One deformable mirror (DM) in conventional adaptive optics system can not meet the needs of large scale and high order aberration compensation. In this paper, a dual DMs way is presented, which needs the decoupling of dual DMs. In dual DMs adaptive optics (AO) system, the decoupling algorithm of dual DMs is deduced. Stroke of one of DMs is large, spatial frequency of the other is high. According to the algorithm, the large stroke DM (LSDM) corrects low order aberration only, and the high spatial frequency DM (HSFDM) corrects other aberration. The experimental result for two 61-DM AO system is presented. The result indicates that the experimental performance of dual DMs AO system is almost the same with that of the conventional AO system using single DM with ideal stroke and equivalent spatial frequency.
For some adaptive optics (AO) systems, one deformable mirror (DM) can not meet the need of large stroke and high spatial frequency. In this paper, a double DMs way is present. In this system, a large stroke DM (LSDM) ...
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ISBN:
(纸本)9780819465801
For some adaptive optics (AO) systems, one deformable mirror (DM) can not meet the need of large stroke and high spatial frequency. In this paper, a double DMs way is present. In this system, a large stroke DM (LSDM) with low spatial frequency corrects low order aberrations and a high spatial frequency DM (HSFDM) with small stroke corrects high order aberrations. The decoupling algorithm of two DMs is essential for working properly. In this paper, a decoupling algorithm and experimental results for a double DM AO system are presented. The result indicates that the compensation result of double DMs AO system is almost the same as that of the conventional AO system using single DM with ideal stroke and equivalent spatial frequency.
The measurements of strapdown imaging seeker are based on body coordinate ***'s attitude motion information is contained within the measured body line of sight(LOS)angles,but LOS rates relative to inertial coordin...
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The measurements of strapdown imaging seeker are based on body coordinate ***'s attitude motion information is contained within the measured body line of sight(LOS)angles,but LOS rates relative to inertial coordinate are needed for the practical guidance ***,strapdown decoupling for measured signal is essential so as to remove the body attitude information from the *** this paper, the decoupling algorithm is proposed and simulation is performed to show the validation of the decoupling algorithm.
In this paper the research is about models and controllers for active magnetic bearing(AMB) *** paper designs distributed controllers, performing the rotating accuracy experiments in the AMB ***,the problem was analyz...
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In this paper the research is about models and controllers for active magnetic bearing(AMB) *** paper designs distributed controllers, performing the rotating accuracy experiments in the AMB ***,the problem was analyzed that the controlling effect is not good for higher speed rotors,and new solving method was provided based on the decoupling control *** simulation conclusion proves that the decoupling method made the better dynamic and static characteristics.
This paper presents a novel six-component force/moment sensor for measuring F-x, F-y, F-z and moments M-x, M-y, M-z simultaneously. In order to minimize interference errors and to construct easily, the sensor adopts o...
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This paper presents a novel six-component force/moment sensor for measuring F-x, F-y, F-z and moments M-x, M-y, M-z simultaneously. In order to minimize interference errors and to construct easily, the sensor adopts only eight thin plate beams as sensing elements and each beam is attached to only one strain gauge, making the total number of plate beams and strain gauges much fewer than previous ones known to the authors. Its operating principle and measuring circuits are described, and the decoupling algorithm is derived. Finite Element analysis (FEA) and measured calibration demonstrate that the sensor bears merits such as small crosstalk, high sensitivity, and fine linearity.
This paper deals with decoupling algorithm in view of control of multivariable electrical drive which concern multi star synchronous motor (NSSM) supplied by PWM inverters. This electrical drive is nonlinear and multi...
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ISBN:
(纸本)0780372980
This paper deals with decoupling algorithm in view of control of multivariable electrical drive which concern multi star synchronous motor (NSSM) supplied by PWM inverters. This electrical drive is nonlinear and multivariable. The developed approach allows using conventional regulators. Two algorithms, based on diagonalization of transfer matrix and compensation of rotating terms are established. Proposed methods are applied, to the double star synchronous machine (DSSM).
The authors present a decoupling joint probabilistic data association (DJPDA) algorithm by decoupling the JPDA algorithm into separate PDA algorithms. To demonstrate the decoupling idea, they derive a set of complete ...
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The authors present a decoupling joint probabilistic data association (DJPDA) algorithm by decoupling the JPDA algorithm into separate PDA algorithms. To demonstrate the decoupling idea, they derive a set of complete decoupling PDA equations for two and three targets. Since these equations are impractical for real-time systems and are unavailable for an arbitrary number of targets, an approximate algorithm is given. The proposed decoupling algorithm is evaluated using computer simulation. It is shown that the performance of the DJPDA algorithm is close to that of the JPDA. algorithm but it needs much less computation.
A finite element method is presented for the solution of the shallow-water wave equations. The method is characterized by a semi-implicit decoupling algorithm; the grid is composed of isoparametric, biquadratic elemen...
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A finite element method is presented for the solution of the shallow-water wave equations. The method is characterized by a semi-implicit decoupling algorithm; the grid is composed of isoparametric, biquadratic elements; and the interpolation is mixed, with biquadratic velocity and bilinear elevation. Several test cases are presented to demonstrate the ability of the method, including a simulation of internal waves in Lake Mjøsa.
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