This paper carries out a study on a high efficiency permanent magnet synchronous motor (PMSM) development method-rapid control prototype (RCP). A specific introduction of the support of hardware-in-the-Ioop simulation...
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This paper carries out a study on a high efficiency permanent magnet synchronous motor (PMSM) development method-rapid control prototype (RCP). A specific introduction of the support of hardware-in-the-Ioop simulation platform for RCP and the development process are given. Hardware in the loop simulation model is built by comparing and analysing of the characteristics of the two control methods and using the hardware and software environment of the system. The conversion from simulation model to code model is realized by using MATLAB and CCS and the application layer code is integrated with the hardware underlying driver code of the hardware-in-the-Ioop simulation platform. The automatic code generation is downloaded to the hardware-in-the-Ioop simulation platform to verify the accuracy of the theoretical calculation. The results show that the mathematical model performed as same as the hardware-in-loop simulation with the same PID parameters, which achieves the expected effect.
There have been growing concerns in networked control system with communication constraints. In the paper, a novel scheduling strategy, model-reference scheduling scheme, is proposed for dealing with the distribution ...
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There have been growing concerns in networked control system with communication constraints. In the paper, a novel scheduling strategy, model-reference scheduling scheme, is proposed for dealing with the distribution of the network resource for the case that network exists not only in forward path but also in feedback path. The states and the control signals gain the access to the network by computing the difference between the real system and the ideal one. The stability analysis and the control and scheduling co-design are given by formulating the problem as a linear equality equation. The proposed strategy is demonstrated through a simple simulation.
In order to improve the accuracy of prediction for the temperature and humidity of the northern greenhouse, this paper proposes a model to predict the temperature and humidity of a greenhouse based on improved LM-RBF....
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In order to improve the accuracy of prediction for the temperature and humidity of the northern greenhouse, this paper proposes a model to predict the temperature and humidity of a greenhouse based on improved LM-RBF. The input data of the model were measured in a greenhouse in Tianjin in March. This model uses the inside and outside meteorological data of the greenhouse as input, and the temperature and humidity in a greenhouse as output. The higher prediction accuracy is obtained by the experimental results, which proved the feasibility of this scheme. This model can be used to forecast the temperature and humidity of a greenhouse and guide the control of the temperature and humidity of a greenhouse.
In the research of prediction on smart home user behavior, the method of improving ARIMA model to predict user behavior is proposed. The water heater's turn-on time is taken as a case, by analyzing the original da...
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In the research of prediction on smart home user behavior, the method of improving ARIMA model to predict user behavior is proposed. The water heater's turn-on time is taken as a case, by analyzing the original data of the water heater turn-on time for 12 consecutive weeks, an improved ARIMA model is established to predict the time when the user turns on the water heater in the 13th week. The results of the comparison between the improved ARIMA model and the ARIMA model shows that the improved ARIMA model has better prediction performance and meet the demand on accurate short-term prediction. This model can be extended to predict the time when users turn on other smart home appliances and smart home user behavior.
In order to solve the friction and external interference on the spherical motor performance, reduce the dynamics model modeling *** on the structural characteristics of the spherical motor, the dynamic model of spheri...
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In order to solve the friction and external interference on the spherical motor performance, reduce the dynamics model modeling *** on the structural characteristics of the spherical motor, the dynamic model of spherical motor is established by using xyz the Euler angle and the Lagrange equation, on this basis, the neural network approximation model is designed to achieve precise control of the spherical motor. The simulation results show that the adaptive control algorithm based on neural network can effectively improve the anti-interference ability of spherical motor, and in the case of large modeling error, it can still guarantee the motion accuracy of the spherical motor.
Complied with relevant standards, a novel on-line testing system for flow characteristics of electronic fuel injector was proposed in this paper. The designed structure of the system was described in details, as well ...
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This paper introduces energy storage technology in Power Grid. Firstly, it briefly expounds the significance and value of energy storage technology research in Power Grid, analyzes the role of it. Then this paper intr...
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This paper introduces energy storage technology in Power Grid. Firstly, it briefly expounds the significance and value of energy storage technology research in Power Grid, analyzes the role of it. Then this paper introduces various types of storage technology such as superconducting magnetic energy storage, super capacitor energy storage, sodium sulfur battery, lithium ion, flow battery technology, and discusses their advantages and disadvantages. Demands on energy storage technology in Power Grid are also summarized. And it focuses on the research status of energy storage technology in power grid. Finally, both some existing problems and the future development trend of energy storage technology in power grid are presented.
Solar Photovoltaic(PV) energy conversion system has drawn the tremendous attention of researchers in the past recent years. The concern related to global energy crisis and climate change threats from conventional sour...
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Solar Photovoltaic(PV) energy conversion system has drawn the tremendous attention of researchers in the past recent years. The concern related to global energy crisis and climate change threats from conventional sources of energy leads to look for alternate sources of energy. Solar energy is seen as a potential alternate source of energy as it is available globally in abundant. To develop an efficient and stable solar PV energy conversion various analysis are done by the researchers. It is analyzed at various facets like PV module characteristic, Maximum Power Point Tracking(MPPT) algorithm, Islanding Detection methods, Inverter etc. This paper present an overview of the research going on in this area, focused on aspects mentioned above. This overview may be useful for further investigation to improve the system.
The classical control algorithm for the control of quadrotor UAV in complex environments is undesirable,takes long for adjusting,response overshoot is large even *** is difficult to ensure a stable *** the adaptive co...
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ISBN:
(纸本)9781509046584
The classical control algorithm for the control of quadrotor UAV in complex environments is undesirable,takes long for adjusting,response overshoot is large even *** is difficult to ensure a stable *** the adaptive control can quickly adjust the object to the equilibrium *** the problem that some parameter of a quadrotor may be changed in some complex or external jamming flight environment,herein an adaptive control scheme with feed-forward and feedback control structure is *** can effectively suppress and eliminate the influence of the change of inertia,and improve the system's anti-interference ability and self-adjustment *** testing results show the effectiveness of the control method,and achieve good control performance when the inertia changes.
In order to research power system voltage stability, based on the basic concepts and principles of the bifurcation theory, the qualitative behavior of power system voltage stability dynamics as modeled by differential...
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In order to research power system voltage stability, based on the basic concepts and principles of the bifurcation theory, the qualitative behavior of power system voltage stability dynamics as modeled by differential algebraic equations is discussed. Bifurcation phenomena and the effect of these bifurcations on the voltage stability analysis are overviewed in power systems. The application of static and dynamic bifurcation in voltage stability studies is discussed in detail, respectively. Two main kinds of bifurcations, that is, saddle-node bifurcation(SNB), Hopf bifurcation(HB) which result in voltage instability, are analyzed emphatically. The advantages and disadvantages of the computation methods are compared. The effect of interaction of bifurcations on voltage stability is also discussed briefly. Multi-parameters problems are intrinsically important in power system voltage stability, and the issues involving higher bifurcation will certainly emerge, other further research fields of bifurcation theory applied in voltage stability analysis is predicted in the future.
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