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Design and Strategy of Series-Parallel Hybrid System Based on BSFC 被引量:2
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作者 Huien Gao Liang Chu +1 位作者 Jianhua Guo Dianbo Zhang 《Journal of Beijing Institute of Technology》 EI CAS 2018年第4期564-574,共11页
In this paper,a drive control strategy is developed based on the characteristics of series-parallel plug-in hybrid system.Energy management strategies in various modes are established with the basis on the minimum bra... In this paper,a drive control strategy is developed based on the characteristics of series-parallel plug-in hybrid system.Energy management strategies in various modes are established with the basis on the minimum brake specific fuel consumption(BSFC)curve of engine.The control strategy,which is based on rules and system efficiency,is adopted to determine the entry/exit mechanisms of various modes according to battery state of charge(SOC),required power and required speed.The vehicle test results verify that the proposed control strategy can improve vehicle economy efficiently and makes a good effect on engine control. 展开更多
关键词 SERIES-parallel plug-in hybrid electric vehicle(PHEV) based on rules based on system efficiency
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Predictive Prefetching for Parallel Hybrid Storage Systems
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作者 Maen M. Al Assaf 《International Journal of Communications, Network and System Sciences》 2015年第5期161-180,共20页
In this paper, we present a predictive prefetching mechanism that is based on probability graph approach to perform prefetching between different levels in a parallel hybrid storage system. The fundamental concept of ... In this paper, we present a predictive prefetching mechanism that is based on probability graph approach to perform prefetching between different levels in a parallel hybrid storage system. The fundamental concept of our approach is to invoke parallel hybrid storage system’s parallelism and prefetch data among multiple storage levels (e.g. solid state disks, and hard disk drives) in parallel with the application’s on-demand I/O reading requests. In this study, we show that a predictive prefetching across multiple storage levels is an efficient technique for placing near future needed data blocks in the uppermost levels near the application. Our PPHSS approach extends previous ideas of predictive prefetching in two ways: (1) our approach reduces applications’ execution elapsed time by keeping data blocks that are predicted to be accessed in the near future cached in the uppermost level;(2) we propose a parallel data fetching scheme in which multiple fetching mechanisms (i.e. predictive prefetching and application’s on-demand data requests) can work in parallel;where the first one fetches data blocks among the different levels of the hybrid storage systems (i.e. low-level (slow) to high-level (fast) storage devices) and the other one fetches the data from the storage system to the application. Our PPHSS strategy integrated with the predictive prefetching mechanism significantly reduces overall I/O access time in a hybrid storage system. Finally, we developed a simulator to evaluate the performance of the proposed predictive prefetching scheme in the context of hybrid storage systems. Our results show that our PPHSS can improve system performance by 4% across real-world I/O traces without the need of using large size caches. 展开更多
关键词 PREDICTIVE PREFETCHING PROBABILITY GRAPH parallel STORAGE systems hybrid STORAGE system
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3D density inversion of gravity gradiometry data with a multilevel hybrid parallel algorithm 被引量:4
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作者 Hou Zhen-Long Huang Da-Nian +1 位作者 Wang En-De Cheng Hao 《Applied Geophysics》 SCIE CSCD 2019年第2期141-152,252,共13页
The density inversion of gravity gradiometry data has attracted considerable attention;however,in large datasets,the multiplicity and low depth resolution as well as efficiency are constrained by time and computer mem... The density inversion of gravity gradiometry data has attracted considerable attention;however,in large datasets,the multiplicity and low depth resolution as well as efficiency are constrained by time and computer memory requirements.To solve these problems,we improve the reweighting focusing inversion and probability tomography inversion with joint multiple tensors and prior information constraints,and assess the inversion results,computing efficiency,and dataset size.A Message Passing Interface(MPI)-Open Multi-Processing(OpenMP)-Computed Unified Device Architecture(CUDA)multilevel hybrid parallel inversion,named Hybrinv for short,is proposed.Using model and real data from the Vinton Dome,we confirm that Hybrinv can be used to compute the density distribution.For data size of 100×100×20,the hybrid parallel algorithm is fast and based on the run time and scalability we infer that it can be used to process the large-scale data. 展开更多
关键词 gravity gradiometry data density inversion GPU MPI hybrid parallel inversion
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Parameters matching and optimization of parallel hybrid electric vehicle powertrain 被引量:7
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作者 陈勇 Chen Xiaokai Lin Yi 《High Technology Letters》 EI CAS 2010年第1期34-38,共5页
Aiming at the development of parallel hybrid electric vehicle (PHEV) powertrain, parameter matching and optimization are presented, According to the performance of PHEV, the optimization range of engine, motor, driv... Aiming at the development of parallel hybrid electric vehicle (PHEV) powertrain, parameter matching and optimization are presented, According to the performance of PHEV, the optimization range of engine, motor, driveline gear ratio and battery parameters are determined. And then a two-level optimization problem is formulated based on analytical target cascading (ATC). At the system level, the optimization of the whole vehicle fuel economy is carried out, while the tractive performance is defined as the constraints. The optimized parameters are cascaded to the subsystem as the optimization targets. At the subsystem level, the final drive and transmission design are optimized to make the ratios as close to the targets as possible. The optimization result shows that the fuel economy had improved significantly, while the tractive performance maintains the former level. 展开更多
关键词 parallel hybrid electric vehicle (PHEV) parameters matching OPTIMIZATION analytical target cascading (ATC) POWERTRAIN
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OPTIMAL TORQUE CONTROL STRATEGY FOR PARALLEL HYBRID ELECTRIC VEHICLE WITH AUTOMATIC MECHANICAL TRANSMISSION 被引量:12
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作者 GU Yanchun YIN Chengliang ZHANG Jianwu 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2007年第1期16-20,共5页
In parallel hybrid electrical vehicle (PHEV) equipped with automatic mechanical transmission (AMT), the driving smoothness and the clutch abrasion are the primary considerations for powertrain control during gears... In parallel hybrid electrical vehicle (PHEV) equipped with automatic mechanical transmission (AMT), the driving smoothness and the clutch abrasion are the primary considerations for powertrain control during gearshift and clutch operation. To improve these performance indexes of PHEV, a coordinated control system is proposed through the analyzing of HEV powertrain dynamic characteristics. Using the method of minimum principle, the input torque of transmission is optimized to improve the driving smoothness of vehicle. Using the methods of fuzzy logic and fuzzy-PID, the engaging speed of clutch and the throttle opening of engine are manipulated to ensure the smoothness of clutch engagement and reduce the abrasion of clutch friction plates. The motor provides the difference between the required input torque of transmission and the torque transmitted through clutch plates. Results of simulation and experiments show that the proposed control strategy performs better than the contrastive control system, the smoothness of driving and the abrasion of clutch can be improved simultaneously. 展开更多
关键词 parallel hybrid electric vehicle (PHEV) Automatic mechanical transmission (AMT) Driving smoothness Clutch abrasion Optimal control Fuzzy logic control
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DEVELOPMENT OF THE ENERGY MANAGEMENT STRATEGY FOR PARALLEL HYBRID ELECTRIC URBAN BUSES 被引量:7
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作者 HUANG Yuanjun YIN Chengliang ZHANG Jianwu 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2008年第4期44-50,共7页
A novel parallel hybrid electrical urban bus (PHEUB) configuration consisting of an extra one-way clutch and an automatic mechanical transmission (AMT) is taken as the study subject. An energy management strategy ... A novel parallel hybrid electrical urban bus (PHEUB) configuration consisting of an extra one-way clutch and an automatic mechanical transmission (AMT) is taken as the study subject. An energy management strategy combining a logic threshold approach and an instantaneous optimization algorithm is proposed for the investigated PHEUB. The objective of the energy management strategy is to achieve acceptable vehicle performance and drivability requirements while simultaneously maximizing the engine fuel consumption and maintaining the battery state of charge in its operation range at all times. Under the environment of Matlab/Simulink, a computer simulation model for the PHEUB is constructed by using the model building method combining theoretical analysis and bench test data. Simulation and experiment results for China Typical Bus Driving Schedule at Urban District (CTBDS_UD) are obtained, and the results indicate that the proposed control strategy not only controls the hybrid system efficiently but also improves the fuel economy significantly. 展开更多
关键词 parallel hybrid electric urban bus (PHEUB) Energy management strategy (EMS) Instantaneous optimization
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Global SH-wave propagation in a 2D whole Moon model using the parallel hybrid PSM/FDM method 被引量:3
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作者 Xianghua Jiang Yanbin Wang +1 位作者 Yanfang Qin Hiroshi Takenaka 《Earthquake Science》 CSCD 2015年第3期163-174,共12页
We present numerical modeling of SH-wave propagation for the recently proposed whole Moon model and try to improve our understanding of lunar seismic wave propagation. We use a hybrid PSM/FDM method on staggered grids... We present numerical modeling of SH-wave propagation for the recently proposed whole Moon model and try to improve our understanding of lunar seismic wave propagation. We use a hybrid PSM/FDM method on staggered grids to solve the wave equations and implement the calculation on a parallel PC cluster to improve the computing efficiency. Features of global SH-wave propagation are firstly discussed for a 100-km shallow and900-km deep moonquakes, respectively. Effects of frequency range and lateral variation of crust thickness are then investigated with various models. Our synthetic waveforms are finally compared with observed Apollo data to show the features of wave propagation that were produced by our model and those not reproduced by our models. Our numerical modeling show that the low-velocity upper crust plays significant role in the development of reverberating wave trains. Increasing frequency enhances the strength and duration of the reverberations.Surface multiples dominate wavefields for shallow event.Core–mantle reflections can be clearly identified for deep event at low frequency. The layered whole Moon model and the low-velocity upper crust produce the reverberating wave trains following each phases consistent with observation. However, more realistic Moon model should be considered in order to explain the strong and slow decay scattering between various phases shown on observation data. 展开更多
关键词 Whole Moon model Seismic wavefield SH-wave propagation hybrid method parallel computing
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A novel hybrid estimation of distribution algorithm for solving hybrid flowshop scheduling problem with unrelated parallel machine 被引量:9
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作者 孙泽文 顾幸生 《Journal of Central South University》 SCIE EI CAS CSCD 2017年第8期1779-1788,共10页
The hybrid flow shop scheduling problem with unrelated parallel machine is a typical NP-hard combinatorial optimization problem, and it exists widely in chemical, manufacturing and pharmaceutical industry. In this wor... The hybrid flow shop scheduling problem with unrelated parallel machine is a typical NP-hard combinatorial optimization problem, and it exists widely in chemical, manufacturing and pharmaceutical industry. In this work, a novel mathematic model for the hybrid flow shop scheduling problem with unrelated parallel machine(HFSPUPM) was proposed. Additionally, an effective hybrid estimation of distribution algorithm was proposed to solve the HFSPUPM, taking advantage of the features in the mathematic model. In the optimization algorithm, a new individual representation method was adopted. The(EDA) structure was used for global search while the teaching learning based optimization(TLBO) strategy was used for local search. Based on the structure of the HFSPUPM, this work presents a series of discrete operations. Simulation results show the effectiveness of the proposed hybrid algorithm compared with other algorithms. 展开更多
关键词 hybrid estimation of distribution algorithm teaching learning based optimization strategy hybrid flow shop unrelated parallel machine scheduling
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A New Hybrid Hierarchical Parallel Algorithm to Enhance the Performance of Large-Scale Structural Analysis Based on Heterogeneous Multicore Clusters
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作者 Gaoyuan Yu Yunfeng Lou +2 位作者 Hang Dong Junjie Li Xianlong Jin 《Computer Modeling in Engineering & Sciences》 SCIE EI 2023年第7期135-155,共21页
Heterogeneous multicore clusters are becoming more popular for high-performance computing due to their great computing power and cost-to-performance effectiveness nowadays.Nevertheless,parallel efficiency degradation ... Heterogeneous multicore clusters are becoming more popular for high-performance computing due to their great computing power and cost-to-performance effectiveness nowadays.Nevertheless,parallel efficiency degradation is still a problem in large-scale structural analysis based on heterogeneousmulticore clusters.To solve it,a hybrid hierarchical parallel algorithm(HHPA)is proposed on the basis of the conventional domain decomposition algorithm(CDDA)and the parallel sparse solver.In this new algorithm,a three-layer parallelization of the computational procedure is introduced to enable the separation of the communication of inter-nodes,heterogeneous-core-groups(HCGs)and inside-heterogeneous-core-groups through mapping computing tasks to various hardware layers.This approach can not only achieve load balancing at different layers efficiently but can also improve the communication rate significantly through hierarchical communication.Additionally,the proposed hybrid parallel approach in this article can reduce the interface equation size and further reduce the solution time,which can make up for the shortcoming of growing communication overheads with the increase of interface equation size when employing CDDA.Moreover,the distributed sparse storage of a large amount of data is introduced to improve memory access.By solving benchmark instances on the Shenwei-Taihuzhiguang supercomputer,the results show that the proposed method can obtain higher speedup and parallel efficiency compared with CDDA and more superior extensibility of parallel partition compared with the two-level parallel computing algorithm(TPCA). 展开更多
关键词 Heterogeneous multicore hybrid parallel finite element analysis domain decomposition
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Improved hybrid parallel strategy for density matrix renormalization group method
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作者 Fu-Zhou Chen Chen Cheng Hong-Gang Luo 《Chinese Physics B》 SCIE EI CAS CSCD 2020年第7期228-233,共6页
We propose a new heterogeneous parallel strategy for the density matrix renormalization group(DMRG)method in the hybrid architecture with both central processing unit(CPU)and graphics processing unit(GPU).Focusing on ... We propose a new heterogeneous parallel strategy for the density matrix renormalization group(DMRG)method in the hybrid architecture with both central processing unit(CPU)and graphics processing unit(GPU).Focusing on the two most time-consuming sections in the finite DMRG sweeps,i.e.,the diagonalization of superblock and the truncation of subblock,we optimize our previous hybrid algorithm to achieve better performance.For the former,we adopt OpenMP application programming interface on CPU and use our own subroutines with higher bandwidth on GPU.For the later,we use GPU to accelerate matrix and vector operations involving the reduced density matrix.Applying the parallel scheme to the Hubbard model with next-nearest hopping on the 4-leg ladder,we compute the ground state of the system and obtain the charge stripe pattern which is usually observed in high temperature superconductors.Based on simulations with different numbers of DMRG kept states,we show significant performance improvement and computational time reduction with the optimized parallel algorithm.Our hybrid parallel strategy with superiority in solving the ground state of quasi-two dimensional lattices is also expected to be useful for other DMRG applications with large numbers of kept states,e.g.,the time dependent DMRG algorithms. 展开更多
关键词 density matrix renormalization group strongly correlated model hybrid parallelization
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Study on load performance of electric motor system used in hybrid electric vehicle
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作者 李雯 Zhang Chengning +1 位作者 Wang Zhifu Gao Lei 《High Technology Letters》 EI CAS 2010年第1期63-66,共4页
The performance of the power assist, global optimization solved by dynamic programming (DP) method, Chery and Insight control strategies are analyzed using the mild parallel hybrid electric vehicle (PHEV) model ba... The performance of the power assist, global optimization solved by dynamic programming (DP) method, Chery and Insight control strategies are analyzed using the mild parallel hybrid electric vehicle (PHEV) model based on Insight structure. The influence of the four control strategies to the load power of the electric motor system used on parallel hybrid electric vehicle is studied. It is found that 80 percent of the motor load power points are under 1/5 of the electric peak power. The motor load power of the power assist control strategy is distributed in the widest range during generating operation, and the motor load power of the global optimization control strategy has the smallest one. 展开更多
关键词 parallel hybrid electric vehicle (PHEV) management strategy motor load power
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Parametric Instabilities of Parallel Propagating Circularly Polarized Alfven Waves:One-Dimensional Hybrid Simulations
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作者 何鹏 高新亮 +1 位作者 陆全明 赵金松 《Chinese Physics Letters》 SCIE CAS CSCD 2015年第11期85-91,共7页
By performing one-dimensional (l-D) hybrid simulations, we analyze in detail the parametric instabilities of the Alfv^n waves with a spectrum in a low beta plasma. The parametric instabilities experience two stages.... By performing one-dimensional (l-D) hybrid simulations, we analyze in detail the parametric instabilities of the Alfv^n waves with a spectrum in a low beta plasma. The parametric instabilities experience two stages. In the first stage, the density modes are excited and immediately couple with the pump Alfv6n waves. In the second stage, each pump Alfv^n wave decays into a density mode and a daughter Alfv6n mode similar to the monochromatic cases. Ftlrthermore, the proton velocity beam will also be formed after the saturation of the parametric instabilities. When the plasma beta is high, the parametric decay in the second stage will be strongly suppressed. 展开更多
关键词 Parametric Instabilities of parallel Propagating Circularly Polarized Alfven Waves:One-Dimensional hybrid Simulations FIGURE
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Research on Novel Linear Driving and Metamorphic Characteristics for Slider-actuated Parallel (Hybrid) Mechanism
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作者 DENG Jia-ming QIN Xian +3 位作者 SHEN Hui-ping ZHAO Hai-bing LI Ju YANG Ting-li 《International Journal of Plant Engineering and Management》 2013年第2期87-95,共9页
This paper presents a novel one-axis linear-drive control system, in which wire rope is wound orderly around drum by servo motor drive and drays the working slider for a long linear reciprocating motion. PKM with this... This paper presents a novel one-axis linear-drive control system, in which wire rope is wound orderly around drum by servo motor drive and drays the working slider for a long linear reciprocating motion. PKM with this control system is metamorphic and can achieve great feed forces, accelerations and transverse speeds, high accuracy and low cost. The metamorphic characteristics are studied, including the metamorphic condition, con- tents, process as well as procedures. The kinematics computation model is established and analyzed. 展开更多
关键词 parallel kinematic mechanism PKM hybrid kinematic mechanism HKM linear-drive control system wire rope
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Structural Synthesis of a Class of 2R2T Hybrid Mechanisms 被引量:5
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作者 TIAN Chunxu FANG Yuefa GUO Sheng 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2016年第4期703-709,共7页
Conventional overconstrained parallel manipulators have been widely studied both in industry and academia,however the structural synthesis of hybrid mechanisms with additional constraints is seldom studied,especially ... Conventional overconstrained parallel manipulators have been widely studied both in industry and academia,however the structural synthesis of hybrid mechanisms with additional constraints is seldom studied,especially for the four degrees of freedom(DOF) hybrid mechanisms.In order to develop a manipulator with additional constraints,a class of important spatial mechanisms with coupling chains(CCs) whose motion type is two rotations and two translations(2R2T) is presented.Based on screw theory,the combination of different types of limbs which are used to construct parallel mechanisms and coupling chains is proposed.The basic types of the general parallel mechanisms and geometric conditions of the kinematic chains are given using constraint synthesis method.Moreover,the 2R2T motion pattern hybrid mechanisms which are derived by adding coupling chains between different serial kinematic chains(SKCs) of the corresponding parallel mechanisms are presented.According to the constraint analysis of the mechanisms,the movement relationship of the moving platform and the kinematic chains is derived by disassembling the coupling chains.At last,fourteen novel hybrid mechanisms with two or three serial kinematic chains are presented.The proposed novel hybrid mechanisms and construction method enrich the family of the spatial mechanisms and provide an instruction to design more complex hybrid mechanisms. 展开更多
关键词 parallel mechanisms structural synthesis hybrid mechanisms screw theory
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Synthesis of Branched Chains with Actuation Redundancy for Eliminating Interior Singularities of 3T1R Parallel Mechanisms 被引量:12
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作者 LI Shihua LIU Yanmin +2 位作者 CUI Hongliu NIU Yunzhan ZHAO Yanzhi 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2016年第2期250-259,共10页
Although it is common to eliminate the singularity of parallel mechanism by adding the branched chain with actuation redundancy, there is no theory and method for the configuration synthesis of the branched chain with... Although it is common to eliminate the singularity of parallel mechanism by adding the branched chain with actuation redundancy, there is no theory and method for the configuration synthesis of the branched chain with actuation redundancy in parallel mechanism. Branched chains with actuation redundancy are synthesized for eliminating interior singularity of 3-translational and 1-rotational(3T1R) parallel mechanisms. Guided by the discriminance method of hybrid screw group according to Grassmann line geometry, all the possibilities are listed for the occurrence of interior singularities in 3T1R parallel mechanism. Based on the linear relevance of screw system and the principles of eliminating parallel mechanism singularity with actuation redundancy, different types of branched chains with actuation redundancy are synthesized systematically to indicate the layout and the number of the branched chainsinterior with actuation redundancy. A general method is proposed for the configuration synthesis of the branched chains with actuation redundancy of the redundant parallel mechanism, and it builds a solid foundation for the subsequent performance optimization of the redundant actuation parallel mechanism. 展开更多
关键词 parallel mechanism interior singularity hybrid screw group branched chain with actuation redundancy
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Steps toward Parallel Intelligence 被引量:32
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作者 Fei-Yue Wang Xiao Wang +1 位作者 Lingxi Li Li Li 《IEEE/CAA Journal of Automatica Sinica》 SCIE EI 2016年第4期345-348,共4页
The origin of artificial intelligence is investigated, based on which the concepts of hybrid intelligence and parallel intelligence are presented. The paradigm shift in Intelligence indicates the ''new normal&... The origin of artificial intelligence is investigated, based on which the concepts of hybrid intelligence and parallel intelligence are presented. The paradigm shift in Intelligence indicates the ''new normal'' of cyber-social-physical systems (CPSS), in which the system behaviors are guided by Merton's Laws. Thus, the ACP-based parallel intelligence consisting of Artificial societies, Computational experiments and Parallel execution are introduced to bridge the big modeling gap in CPSS. © 2014 Chinese Association of Automation. 展开更多
关键词 Control systems Electrical engineering
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Energy management strategy for a parallel hybrid electric vehicle equipped with a battery/ultra-capacitor hybrid energy storage system 被引量:6
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作者 Jun-yi LIANG Jian-long ZHANG +2 位作者 Xi ZHANG Shi-fei YUAN Cheng-liang YIN 《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》 SCIE EI CAS CSCD 2013年第8期535-553,共19页
To solve the low power density issue of hybrid electric vehicular batteries, a combination of batteries and ultracapacitors (UCs) could be a solution. The high power density feature of UCs can improve the performance ... To solve the low power density issue of hybrid electric vehicular batteries, a combination of batteries and ultracapacitors (UCs) could be a solution. The high power density feature of UCs can improve the performance of battery/UC hybrid energy storage systems (HESSs). This paper presents a parallel hybrid electric vehicle (HEV) equipped with an internal combus- tion engine and an HESS. An advanced energy management strategy (EMS), mainly based on fuzzy logic, is proposed to improve the fuel economy of the HEV and the endurance of the HESS. The EMS is capable of determining the ideal distribution of output power among the internal combustion engine, battery, and UC according to the propelling power or regenerative braking power of the vehicle. To validate the effectiveness of the EMS, numerical simulation and experimental validations are carried out. The results indicate that EMS can effectively control the power sources to work within their respective efficient areas. The battery load can be mitigated and prolonged battery life can be expected. The electrical energy consumption in the HESS is reduced by 3.91% compared with that in the battery only system. Fuel consumption of the HEV is reduced by 24.3% compared with that of the same class conventional vehicles under Economic Commission of Europe driving cycle. 展开更多
关键词 Energy management Fuel economy parallel hybrid electric vehicle hybrid energy storage system (HESS) Fuzzy logic
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基于进风优化的混合动力双电机油冷热管理系统研究
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作者 潘文军 张志强 丁磊 《客车技术与研究》 2024年第5期11-14,共4页
针对某款采用双电机油冷器冷却的串并联式混合动力汽车,设计一套动力热管理系统。综合三维和一维仿真方法建立热管理仿真模型进行进风量和油温仿真分析,并根据仿真结果进行优化设计。
关键词 串并联混合动力 双电机油冷 热管理系统 进风量
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液压挖掘机电容蓄能式并联混合动力系统结构及控制策略研究 被引量:16
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作者 肖清 王庆丰 张彦廷 《中国机械工程》 EI CAS CSCD 北大核心 2008年第5期625-629,共5页
分析了以电容器为蓄能装置的液压挖掘机并联混合动力系统的结构,在此基础上,针对液压挖掘机的工况,提出了以发动机工作点和电容器荷电状态(state of charge,SOC)值为优化变量的控制策略,并建立了试验系统对该控制策略进行试验研究。研... 分析了以电容器为蓄能装置的液压挖掘机并联混合动力系统的结构,在此基础上,针对液压挖掘机的工况,提出了以发动机工作点和电容器荷电状态(state of charge,SOC)值为优化变量的控制策略,并建立了试验系统对该控制策略进行试验研究。研究结果表明,采用该控制策略后,改善了发动机工作点的分布区域,抑制了电容器SOC的变化幅度,且基本不影响系统的响应性能。 展开更多
关键词 液压挖掘机 并联混合动力系统 电容器 控制策略
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液压挖掘机并联混合节能动力系统多目标优化控制策略 被引量:13
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作者 崔宁 秦四成 赵丁选 《西安交通大学学报》 EI CAS CSCD 北大核心 2016年第6期116-121,共6页
针对采用电容蓄能进行能量回收的并联式液压挖掘机混合动力系统提高能量效率和降低转矩变化幅度的问题,提出了一种基于实时优化力矩分配的新型多目标优化控制策略。根据负载特性将由电动机/发电机与柴油机构成的混合动力装置的工况分为... 针对采用电容蓄能进行能量回收的并联式液压挖掘机混合动力系统提高能量效率和降低转矩变化幅度的问题,提出了一种基于实时优化力矩分配的新型多目标优化控制策略。根据负载特性将由电动机/发电机与柴油机构成的混合动力装置的工况分为高负载和低负载两个采用不同目标转速的工作区,通过曲线拟合对定转速下转矩与能量效率特性关系进行建模,构建以转矩为变量的目标函数,并通过惩罚函数对转矩变化幅度进行限制,提高系统的能量效率并降低转矩变化对系统机械结构的损害。采用仿真程序和模拟实验平台分别进行了实验,以验证该策略的效果。实验结果表明:与固定比例转矩策略相比,系统的最大转矩变化幅度降低了37.9%,总体能量损耗和燃油损耗分别降低了8.74%和8.9%。采用该控制策略后,系统在提供相近的功率输出特性的情况下,其总体的能量消耗、燃油消耗和转矩特性均得到了改善。 展开更多
关键词 能量效率 并联式混合动力 液压挖掘机 控制策略
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