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9th IEEE Conference on Industrial Electronics and Applications (ICIEA)

作者： Diao, Yanhua Zhang, Xiuqing Li, Meng Wang, Xiaojun Hebei Univ Sci & Technol Dept Informat Sci & Engn Shijiazhuang Peoples R China

ISBN: (纸本)9781479943159

Crystal oscillator disciplined system based on digital phase locked loop (PLL) technology, using satellite signals output 1 Pulse Per Second (1PPS) local oscillator signal tame, so as to obtain high-precision time and frequency standards. Firstly, using MATLAB simulation for GPS tracking signal, through Kalman filtering and application performance analysis, adaptive filtering coefficients obtained crystal tame and dimension x then, in the case of different parameters pi algorithm for the simulation for the existence of a competitive relationship between the various performance indicators to optimize the coefficient of the Proportion Integration (pi) algorithm x finally, combining the Kalma filtering and pi algorithm to filter and adjust phase. The test result shows that, Kalman filtering and pi algorithm combines technology effectively filter out signal noise, the excellent long-term stability characteristics of a standard satellite receiver seconds pulses generated with excellent short-term stability oven controlled crystal characteristics combined, solving local crystal oscillator aging, long term stability in accuracy and poor performance issues, system output frequency accuracy up nanosecond (ns), finally got the short and long term have a high stability, high precision frequency reference and time synchronization standard source.

关键词： Crystal Oscillator Phase-Locked Loop Kalman Filter pi algorithm

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SIMPLE TECHNIQUE TO IMPROVE pi-algorithm FOR PRIME IMPLICANT DETERMINATION

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IEEE TRANSACTIONS ON COMPUTERS 1976年第11期25卷 1184-1187页

作者： IKRAM, M ROY, DA NOVA SCOTIA TECH COLL DEPT ELECT ENGNHALIFAXNOVA SCOTIACANADA

A simple refinement of Morreale's method yields a useful criterion to identify and cancel the redundant subfunctions generated in the application of the pi-algorithm. Use of such a criterion improves the efficienc... 详细信息

关键词： algorithm Boolean Functions Component Functions Incompletely Specified Logical Product Multiterminal Functions pi algorithm Prime Implicants Product Functions Recursive Operator pi

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Application of pseudo-derivative-feedback algorithm in greenhouse air temperature control

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COMPUTERS AND ELECTRONICS IN AGRICULTURE 2000年第3期26卷 283-302页

作者： Setiawan, A Albright, LD Phelan, RM Cornell Univ Ithaca NY 14853 USA

Pseudo-Derivative-Feedback (PDF) control is compared to pi control through simulation using an approximated dynamic system thermal model of the greenhouse. The effects of time delays on control system performance for both PDF and pi control are demonstrated. Results showed PDF control to have a better load handling capability than pi control. PDF control was exceptionally better than pi for systems without time delay and significantly better for systems with time delay. The algorithm was then tested to control a greenhouse section and showed satisfactory results. (C) 2000 Elsevier Science B.V. All rights reserved.

关键词： simulation pi algorithm PDF algorithm closed-loop control environment control

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DC-link capacitor voltage control for single-phase shunt active power filter with step size error cancellation in self-charging algorithm

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IET POWER ELECTRONICS 2016年第2期9卷 323-335页

作者： Zainuri, Muhammad Ammirrul Atiqi Mohd Radzi, Mohd Amran Mohd Soh, Azura Che Mariun, Norman Abd Rahim, Nasrudin Univ Putra Malaysia Dept Elect & Elect Engn Fac Engn Serdang 43400 Selangor Malaysia Univ Malaya Power Energy Dedicated Adv Ctr Kuala Lumpur Malaysia

This study presents an improved self-charging algorithm by introducing a new feature known as step size error cancellation for better performance of DC-link capacitor voltage control in single-phase shunt active power filter (SAPF). Previous works of self-charging algorithms were focused only for steady-state operation by using either proportional-integral (pi) or fuzzy logic control (FLC). However, in a certain operation of any power system, dynamic operation may also happen. Thus, by introducing step size error cancellation as an additional feature to the self-charging algorithm, both steady state and dynamic operations can be covered. For evaluation and comparison analysis, self-charging with pi and FLC algorithms have been developed too. All the algorithms were simulated in MATLAB-Simulink, respectively, together with the single-phase SAPF. For hardware implementation, the proposed algorithm was programmed in TMS320F28335 digital signal processing board. The other two conventional self-charging algorithms were also programmed for comparison purposes. From the results and analysis, the proposed self-charging with step size error cancellation shows the best performance with high accuracy, fast response time and less overshoot and undershoot. It performs well in both steady state and dynamic operations as compared with both previous self-charging techniques which only work well in steady-state operation.

关键词： pi control fuzzy control digital signal processing chips control engineering computing power engineering computing power harmonic filters power capacitors voltage control active filters DC-link capacitor voltage control single-phase shunt active power filter step size error cancellation self-charging algorithm single-phase SAPF power system steady state operation dynamic operation pi algorithm FLC algorithm MATLAB-Simulink TMS320F28335 digital signal processing board performance assessment

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Design of an integrated energy management strategy for a plug-in hybrid electric bus

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JOURNAL OF POWER SOURCES 2020年第0期448卷 227391-000页

作者： Fan, Likang Zhang, Youtong Dou, Haishi Zou, Runnan Beijing Inst Technol Low Emiss Vehicle Res Lab Beijing 100081 Peoples R China Beijing Inst Technol Natl Engn Lab Elect Vehicles Beijing 100081 Peoples R China

The performance of Plug-in Hybrid Electric Vehicle (PHEV) depends on the energy management strategy (EMS). An optimal EMS guarantees the maximum use of the energy through electric power grid, coordinates power output of main power sources and exerts comprehensive advantages of both engine and motor. However, the current EMS cannot react to the dynamic driving cycles in the future and thus have a bad real-time performance. In order to solve these problems, a novel EMS based on rule-based energy strategy (RE), dynamic programming algorithm (DP) and equivalent fuel consumption algorithm (ECMS) is proposed. First, DP is used to extract the boundary of mode switching and shift schedule under three typical driving cycles in offline, especially, RE is corrected using the boundary of mode switching. Second, an instantaneous optimization strategy-ECMS is used to replace the Charge-Depleting Mode (CD) of RE for finding the real-time optimal solution in a wider range in online, in this part, owe to the fixed distance of urban public transport, a reference State of Charge (SOC) is formulated, and the Proportion-Integration (pi) algorithm is used to make the actual SOC always follow the reference SOC by adjusting the equivalent factor. Finally, combine all the above efforts, a real-time optimization EMS is proposed and validated through simulation and experiment. The results show that this approach can significantly enhance the vehicle drivability, with overall obvious improvement of the comprehensive performance qualification based on both fuel economy and drivability.

关键词： Plug-in hybrid electric vehicle (PHEV) Energy management Drivability Control strategy Equivalent consumption minimization strategy (ECMS) Dynamic programming (DP) pi algorithm

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ADP-based active optimal fault-tolerant control for modular manipulator with multiple sensor failure

ADP-based active optimal fault-tolerant control for modular ...

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Chinese Automation Congress (CAC)

作者： Li, Bing Fang, Tao Zhou, Fan Dong, Bo Li, Yuanchun Changchun Univ Technol Dept Control Sci & Engn Changchun Peoples R China Chanchun Univ Sci & Techonlgy Dept Elect Informat Engn Changchun Peoples R China

ISBN: (纸本)9781728140940

In this paper, we propose a novel active fault-tolerant control (AFTC) method for modular manipulators with multiple sensor failure, which is based on adaptive dynamic programming (ADP). Combining the principle of diffeomorphism, a first-order filter is introduced to convert sensor faults into pseudo-actuator faults. Combine the sensor faults estimated by the adaptive sensor fault observer to establish the Hamilton-Jacobi-Bellman (HJB) equation. Based on the ADP, the online policy iteration (pi) algorithm is applied to solve the HJB equation by establishing a critic neural network. It is proved that the closed-loop modular manipulators system is asymptotic stability according to the Lyapunov theory. Simulation results of 2-DOF modular manipulator systems with two configurations demonstrate the validity of the proposed algorithm finally.

关键词： adaptive dynamic programming fault-tolerant control modular manipulators pi algorithm critic neural network

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On the sampling period in standard and fuzzy control algorithms for servodrives - A multicriterial design and a timing strategy for constant sampling

On the sampling period in standard and fuzzy control algorit...

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5th International Conference on Informatics in Control, Automation and Robotics

作者： Mihai, Dan Univ Craiova Craiova Romania

ISBN: (纸本)9789898111326

The paper deals with the best choice for the control sampling period in term of a multicriterial conditioning, with the on-line timing and with a comparison between the conventional (like pi) control algorithms and the fuzzy control. Several useful relations are followed by diagrams obtained in simulation and by different real-time recordings both for the timing and for characteristic variables of the system. Implementations with microcontroller and DSP are used for analyzing the design criterion and the timing strategy. The application field concerns a servodrive, so the real-time constraints are quite strong. The author conceived a general control strategy for the on-line timing based on imbricate interrupts.. each pulse encoder acting on the hardware input interrupt of the control processor.

关键词： sampling period pi algorithm fuzzy control on-line timing servodrives

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Optimization and Realization of Anti-interference algorithm to Navigation Receiver

Optimization and Realization of Anti-interference Algorithm ...

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CIE International Conference on Radar (RADAR)

作者： Chen, Li-wen Zheng, Jian-sheng Fujian Univ Technol Key Lab Automot Elect & Elect Drive Fujian Prov Fuzhou 350108 Fujian Peoples R China Wuhan Univ Elect & Informat Sch Wuhan 430072 Hubei Peoples R China

ISBN: (纸本)9781509048281

In this paper, we discuss how to protect satellite signals from strong interference signals The power inversion (pi) algorithm has been widely used in interference suppression. However, both the interference and the satellite signals are significantly suppressed. Therefore, we further optimized the satellite steering vector and interference steering vector using a multi-star, forming pi approach. To verify the superiority of the new method, we designed an anti-interference hardware platform that includes a seven-element antenna array, a radio frequency (RF) front-end module, a field-programmable gate array (FPGA), and a digital signal processor (DSP)to compare the two algorithms. Using the hardware platform, we compare the traditional pi algorithm to our proposed optimized algorithm using the following three metrics: simulation waveform, direction of arrival (DOA), and positioning. The results show that our method can suppress interference from satellites, resulting in better efficiency than the pi algorithm.

关键词： GNSS receiver pi algorithm Multi-pi algorithm Hardware Platform

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Optimal Snapshot Number of Power Inversion Adaptive Array in ITS Communication Environment

Optimal Snapshot Number of Power Inversion Adaptive Array in...

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3rd Asia-Pacific Microwave Conference Proceedings (APMC)

作者： Ukawa, Takuya Fujimoto, Mitoshi Hori, Toshikazu Univ Fukui Grad Sch Engn Fukui 9108507 Japan

ISBN: (纸本)9781479914722

It is worried that the ITS may suffer interference from broadcast system or mobile communication system. Thus, we proposed a power inversion adaptive array which can suppress an interference wave in ITS propagation environment. However, the interference suppression performance is reduced due to multipath fading. As a countermeasure, we devised a continue control method for power inversion to follow the change of propagation environment. In this paper, the optimal snapshot number for properly estimating a correlation matrix is examined. As the result of examination, it is clarified that the optimal number of snapshots is about 30 times.

关键词： ITS adaptive array pi algorithm multipath environment

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Mathematical Model and System Simulation of the Brushless DC Motor

Mathematical Model and System Simulation of the Brushless DC...

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10th International Symposium on Distributed Computing and Applications to Business, Engineering and Science (DCABES)

作者： Zhu Caihong Zhang Hongtao Suzhou Vocat Univ Dept Elect Informat Engn Suzhou Peoples R China

ISBN: (纸本)9780769544151

The brushless DC motor (BLDCM) is a multi-variable and non-linear system. The mathematical model of the BLDCM is founded, the simulation model of the double closed-loop control system is designed using Matlab6.5, and the rotational speed profiles of the electrical machinery are given on the control strategy of traditional pi algorithm and fuzzy-pi algorithm, then the validity of the proposed BLDCM model and the rationality of the control system are all confirmed.

关键词： BLDCM double closed-loop control system pi algorithm Fuzzy-pi algorithm

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