|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Robust adaptive fault-tolerant control of a tandem coaxial ducted fan aircraft with actuator saturation显示文摘This paper is concerned with the robust adaptive fault-tolerant control of a tandem coaxial ducted fan aircraft under system uncertainty, mismatched disturbance, and actuator saturation.For the proposed aircraft, comprehensive controllability analysis is performed to evaluate the controllability of each state as well as the margin to reject mismatched disturbance without any knowledge of the controller. Mismatched disturbance attenuation is ensured through a structured Hinfinity controller tuned by a non-smooth optimization algorithm. Embedded with the H-infinity controller, an adaptive control law is proposed in order to mitigate matched system uncertainty and actuator fault. Input saturation is also considered by the modified reference model. Numerical simulation of the novel ducted fan aircraft is provided to illustrate the effectiveness of the proposed method. The simulation results reveal that the proposed adaptive controller achieves better transient response and more robust performance than classic Model Reference Adaptive Control(MRAC) method, even with serious actuator saturation. | Xiaoliang WANG Changle XIANG Homayoun NAJJARAN Bin XU | 2018 | Chinese Journal of Aeronautics2018，31，6： | 14 |
| 2 | Synthetical Efficiency-based Optimization for the Power Distribution of Power-split Hybrid Electric Vehicles显示文摘Now the optimization strategies for power distribution are researched widely,and most of them are aiming to the optimal fuel economy and the driving cycle must be preknown.Thus if the actual driving condition deviates from the scheduled driving cycle,the effect of optimal results will be declined greatly.Therefore,the instantaneous optimization strategy carried out on-line is studied in this paper.The power split path and the transmission efficiency are analyzed based on a special power-split scheme and the efficiency models of the power transmitting components are established.The synthetical efficiency optimization model is established for enhancing the transmission efficiency and the fuel economy.The identification of the synthetical efficiency as the optimization objective and the constrain group are discussed emphatically.The optimization is calculated by the adaptive simulated annealing(ASA)algorithm and realized on-line by the radial basis function(RBF)-based similar models.The optimization for power distribution of the hybrid vehicle in an actual driving condition is carried out and the road test results are presented.The test results indicate that the synthetical efficiency optimization method can enhance the transmission efficiency and the fuel economy of the power-split hybrid electric vehicle(HEV)observably.Compared to the rules-based strategy the optimization strategy is optimal and achieves the approximate global optimization solution for the power distribution.The synthetical efficiency optimization solved by ASA algorithm can give attentions to both optimization quality and calculation efficiency,thus it has good application foreground for the power distribution of power-split HEV. | WANG Weida HAN Lijin XIANG Changle MA Yue LIU Hui | 2014 | Chinese Journal of Mechanical Engineering2014，27，1： | 12 |
| 3 | MPC-based energy management with adaptive Markov-chain prediction for a dual-mode hybrid electric vehicle显示文摘The and energy to management strategy battery is state an important part of a hybrid electrical vehicle design.It is used to improve various fuel economy sustain a proper of charge an by controlling control the power components is while satisfying to constraints and driving demands.However,achieving optimal and performance challenging due the nonlinearities of the hybrid powertrain,conflicting vehicle the time varying constraints,the dilemma capable in which controller control complexity and real-time capability are generally objectives.In this paper,a of real-time cascaded complies strategy is proposed for a dual-mode hybrid electric that considers controller based nonlinearities based the system model and with all time-varying with constraints.sampling The strategy consists of a supervisory controller on a non-linear predictive control short(MPC)sampling a long time with future strategy interval and a coordinating on linear model predictive based control with a time interval to deal different load dynamics of the system.The Additionally,a novel data methodology using adaptive Markov chains to predict demand is introduced.predictive future information is used to improve controller cycles performance.conducted.The The proposed is implemented validity on a real test-bed approach and experimental trials using economy unknown is driving are results other demonstrate the of the proposed and show that fuel significantly improved compared with methods. | XIANG ChangLe DING Feng WANG WeiDa HE Wei QI YunLong | 2017 | Science China(Technological Sciences)2017，60，5： | 11 |
| 4 | Analysis Method and Principle of Dual-mode Electro-mechanical Variable Transmission Program显示文摘Automotive industry,as an important pillar of the national economy,has been rapidly developing in recent years.But proplems such as energy comsumption and environmental pollution are posed at the same time.Electro-mechanical variable transmission system is considered one of avilable workarounds.It is brought forward a kind of design methods of dual-mode electro-mechanical variable transmission system rotational speed characteristics and dual-mode drive diagrams.With the motor operating behavior of running in four quadrants and the speed characteristics of the simple internal and external meshing single planetary gear train,four kinds of dual-mode electro-mechanical transmission system scheme are designed.And the velocity,torque and power characteristics of one of the programs are analyzed.The magnitude of the electric split-flow power is an important factor which influences the system performance,so in the parameters matching design,it needs to reduce the power needs under the first mode of the motor.The motor,output rotational speed range and the position of the mode switching point have relationships with the characteristics design of the planetary gear set.The analysis method is to provide a reference for hybrid vehicles' design.As the involved rotational speed and torque relationships are the natural contact of every part of transmission system,a theory basis of system program and performance analysis is provided. | LI Hongcai YAN Qingdong XIANG Changle WANG Weida | 2012 | Chinese Journal of Mechanical Engineering2012，25，3： | 6 |
| 5 | P-T stability conditions of methane hydrate in sediment from South China Sea显示文摘For reasonable assessment and safe exploitation of marine gas hydrate resource, it is important to determine the stability conditions of gas hydrates in marine sediment. In this paper, the seafloor water sample and sediment sample (saturated with pore water) from Shenhu Area of South China Sea were used to synthesize methane hydrates, and the stability conditions of methane hydrates were investigated by multi-step heating dissociation method. Preliminary experimental results show that the dissociation temperature of methane hydrate both in seafloor water and marine sediment, under any given pressure, is depressed by approximately -1.4 K relative to the pure water system. This phenomenon indicates that hydrate stability in marine sediment is mainly affected by pore water ions. | Shicai Sun Yuguang Ye Changling Liu Fengkui Xiang Yan Ma | 2011 | Journal of Natural Gas Chemistry2011，20，5： | 2 |
| 6 | Economic MPC-based transient control for a dual-mode power-split HEV显示文摘The existing research into hybrid electric vehicle(HEV) control is mainly focussed on the optimisation of the power distribution between a conventional internal combustion engine(ICE) and an alternative power source(usually a battery pack), however,transient control, which is a key technique that affects both fuel economy and the drivability of the HEV, has not been fully addressed. Especially in dual-mode power-split HE Vs, due to the different dynamic characteristics of the actuators in the transmission, and its complicated speed-torque relationship, transient control also affects the precision of power distribution and the speed of response of the electric output power. To improve the transient control performance, the design of an economic model predictive control(EMPC)-based transient controller for a dual-mode power-split HEV is developed. By incorporating an experimental identification model of a diesel ICE in a control-oriented transmission model, a better coordination among the actuators involved in HEV transmission can be achieved. Moreover, an ICE efficiency index is also added to the objective function to improve ICE fuel efficiency during this transient process. Then, a fast MPC method is applied to reduce the on-line computation effort required of the proposed control algorithm. By the flexible application of the EMPC and an innovative ICE model which is suited to the control-oriented model in EMPC, the transient control performance was improved. The effectiveness,and the real-time performance,of the control algorithm are validated by way of MATLABTM/Simulink-based simulations,as well as test-bed experiments combined with the use of the RapidECU platform. | QI YunLong WANG WeiDa XIANG ChangLe ZHAO YuLong | 2017 | Science China(Technological Sciences)2017，60，12： | 2 |
| 7 | A path planning algorithm for autonomous flying vehicles in cross-countryenvironments with a novel TF-RRT^(*) method显示文摘Autonomous flying vehicles(AFVs)are promising future vehicles,which have high obstacle avoidance ability.To plan a feasible path in a wide range of cross-country environments for the AFV,a triggered forward optimal rapidly-exploring random tree(TF-RRT^(*))method is proposed.Firstly,an improved sampling and tree growth mechanism is built.Sampling and tree growth are allowed only in the forward region close to the target point,which significantly improves the planning speed;Secondly,the driving modes(ground-driving mode or air-driving mode)of the AFV are added to the sampling process as a planned state for uniform planning the driving path and driving mode;Thirdly,according to the dynamics and energy consumption models of the AFV,comprehensive indicators with energy consumption and efficiency are established for path optimal procedures,so as to select driving mode and plan driving path reasonably according to the demand.The proposed method is verified by simulations with an actual cross-country environment.Results show that the computation time is decreased by 71.08%compared with Informed-RRT^(*)algorithm,and the path length of the proposed method decreased by 13.01%compared with RRT^(*)-Connect algorithm. | Tianqi Qie Weida Wang Chao Yang Ying Li Wenjie Liu Changle Xiang | 2022 | Green Energy and Intelligent Transportation2022，1，3： | 1 |
| 8 | Formation age and tectonic setting of the Shirengou Neoarchean banded iron deposit in eastern Hebei Province: Constraints from geochemistry and SIMS zircon U–Pb dating显示文摘 | Lianchang Zhang Mingguo Zhai Xiaojing Zhang Peng Xiang Yanpei Dai Changle Wang Franco Pirajno | 2011 | Precambrian Research2011，，： | 1 |
| 9 | Numerical simulation of sound radiation on gearbox's housing显示文摘 | XIANG Changle WANG Wenping LIU Hui | 1998 | Chinese Journal of Mechanical Engineering1998，11，4： | 1 |
| 10 | A new topology and control strategy for a hybrid batteryultracapacitor energy storage system显示文摘 | XIANG Changle WANG Yanzi HU Sideng | 2014 | Energies2014，7，5： | 1 |
| 11 | NUMERICAL SIMULATION OF SOUND RADIATION ON GEARBOX'S HOUSING显示文摘The fluid-structure coupling finite element model and the boundary element model of a complex gearbox's housing are built based on the theory of fluid-structure coupling fmite element method and boundary element method.At the same time,the exciting forces of the housing are analyzed and applied to the finite element models.Firstly,vibration of the housing is calculated by the fluid-structure coupling finite element model;secondly,the calculated result is verified by the experiment;finally,sound radiation of the housing is calculated by the boundary element.According to the calculated results,the housing adds some ribs not only to increase the strength,but also to reduce the sound radiation of the housing.At last,the sound radiation of the modified housing is calculated,which shows that the sound radiation of the modified housing with ribs is lower. | XIANG Changle WANG Wenping LIU Hui | 2008 | Chinese Journal of Mechanical Engineering2008，21，3： | 1 |
| 12 | A multi-objective power flow optimization control strategy for a power split plug-in hybrid electric vehicle using game theory显示文摘Power flow optimization control,which governs the energy flow among engine,battery,and motor,plays a very important role in plug-in hybrid electric vehicles(PHEVs).Its performance directly affects the fuel economy of PHEVs.For the purpose of improving fuel economy,the electric system including battery and motor will be frequently scheduled,which would affect battery life.Therefore,a multi-objective optimization mechanism taking fuel economy and battery life into account is necessary,which is also a research focus in field of hybrid vehicles.Motivated by this issue,this paper proposes a multi-objective power flow optimization control strategy for a power split PHEV using game theory.Firstly,since the demand power of driver which is necessary for the power flow optimization control,cannot be known in advance,the demand power of driver can be modelled using a Markov chain to obtain predicted demand power.Secondly,based on the predicted demand power,the multi-objective optimization control problem is transformed into a game problem.A novel non-cooperative game model between engine and battery is established,and the benefit function with fuel economy and battery life as the optimization objective is proposed.Thirdly,under the premise of satisfying various constraints,the participants of the above game maximize their own benefit function to obtain the Nash equilibrium,which comprises of optimal power split scheme.Finally,the proposed strategy is verified compared with two baseline strategies,and results show that the proposed strategy can reduce equivalent fuel consumption by about 15%compared with baseline strategy 1,and achieve similar fuel economy while greatly extend battery life simultaneously compared with baseline strategy 2. | WANG WeiDa WANG WeiQi YANG Chao LIU Cheng YANG LiuQuan SUN XiaoXia XIANG ChangLe | 2021 | Science China(Technological Sciences)2021，64，12： | 1 |
| 13 | Hard car- bon wrapped in graphene networks as lithum ion battery anode显示文摘 | Zhang Xiang Fan Changling Li Lingfang | 2014 | Electrochimica Acta2014，149，： | 1 |
| 14 | Formation age and tectonic setting of the Shirengou Neoarchean banded iron deposit in eastern Hebei Province: Constraints from geochemistry and SIMS zircon U–Pb dating显示文摘 | Lianchang Zhang Mingguo Zhai Xiaojing Zhang Peng Xiang Yanpei Dai Changle Wang Franco Pirajno | 2011 | Precambrian Research2011，，： | 1 |
| 15 | A novel approach to the attitude stabilization structure for ducted-fan operative aerial robots:Finding improvements for modeling error and strong external transient disturbance显示文摘This research concerns a novel attitude stabilization structure for a ducted-fan aerial robot to work against modeling error and strong external transient disturbance,and it focuses on two main control targets:modeling error compensation,and the improvement of disturbance resistance along the rolling channel.For the first research objective,we proposed an adaptive nominal controller with the reconfigurable control law design based on the estimation of the modeling error found in the closed-loop.Results of simulations and corresponding flight tests verified that the proposed adaptive control structure is robust against both constant and time-varying modeling error.For the other research objective,a SAC(Stability Augmentation Control)structure was devised based on the CMG(Control Moment Gyroscope)theory in order to provide extra moment which effectively withstands the transient disturbance beyond the CDG(Critical Disturbance Gain).Furthermore,we studied the corresponding controller for the SAC via the SMC(sliding mode control)theory,while the working mechanism and performance of the SAC were verified through a specially devised prototype. | Wei FAN Bin XU Changle XIANG Yibo ZHANG Haiyang YANG | 2022 | Chinese Journal of Aeronautics2022，35，2： | 1 |
| 16 | Influence of Wall Effect on Comprehensive Controllability for Ducted Fan Aircraft显示文摘A novel coaxial ducted fan structure aircraft is proposed to enable the aircraft near vertical walls at high altitudes.The state space equation of the system can be obtained by correlation deduction and identification of the whole prototype model.Based on the duct test bench experiment and computational fluid dynamics(CFD)simulation analysis,the expressions between the different distances dWE from the rotor center of the prototype to the wall and the thrust,reaction torque,and tilting moment of the system under hovering conditions are obtained.The influence of the wall effect of the prototype is incorporated into the system model to analyze the relationship between distance dWE and the comprehensive controllability of the system.The results show that the system comprehensive controllability vector of other channels changes little with the decrease of the distance dWE,and only the controllability vector of the rolling channel increases significantly.At the same time,the tilting moment also increases significantly,which strengthens the tendency of the prototype to tilt towards the wall. | Tianfu Ai Changle Xiang Bin Xu Wei Fan Yibo Zhang | 2020 | Journal of Beijing Institute of Technology2020，29，4： | 0 |
| 17 | Model-Based Double Closed-Loop Coordinated Control Strategy for the Electro-Mechanical Transmission System of Heavy Power-Split HEVs显示文摘The dual-mode electro-mechanical transmission(EMT)system is a crucial part of power-split hybrid electric vehicles(HEVs),especially for the heavy HEVs.To improve the precision of the system power distribution and the response speed of the electric power supply,a model-based double closed-loop coordinated control strategy is proposed.As the basis of the proposed control strategy,an EMT system model,particularly of an electrical system,is established first.The proposed control strategy includes the power distribution strategy,battery power closed-loop feedback control strategy,and motor coordinated control strategy.To verify the feasibility of the proposed control strategy,simulation and experiment are performed.The results indicate that the proposed control strategy can realize the expected power distribution by coordinating generators and motors and achieve rapid and stable electric power supply. | Weida Wang Yuhang Zhang Xiaoxia Sun Changle Xiang Chao Yang | 2021 | Automotive Innovation2021，4，1： | 0 |
| 18 | Theoretical and Experimental Investigations of Gyroplane Jump Takeoff Dynamics显示文摘A nonlinear and time-varying gyroplane jump takeoff dynamics model considering the unsteady ground effect and the rapid blade-pitch increase(RBPI) is developed and validated against the experiment data.The precisions of the proposed model,an experienced Hollmann model and three other simplified models are compared by displaying the height and rpm time histories of those models and the experimental data.The mean square errors(MSE) of the height histories and maximum height errors(MHE) between those models are calculated and given out.The statistics provide a kind of evaluation method of importance of the unsteady ground effect,RBPI,and the induced velocity on jump takeoff performance in vertical phase.The impact of the unsteady ground effect and RBPI on the thrust and induced velocity of the experimental rotor of a small scale platform is analyzed.The study indicates that the proposed model agrees better with the experimental data than other models.It is useful for predicting the gyroplane jump takeoff performance for design. | Xingbang Yang Changle Xiang Bin Xu Wei Fan | 2017 | Journal of Harbin Institute of Technology(New Series)2017，24，3： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员