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Статті в журналах з теми "Hydraulic machinery Electric driving Computer simulation"
1
Li, Zhongshen, Yuanzheng Lin, Qihuai Chen, Kai Wu, Tianliang Lin, Haoling Ren, and Wen Gong. "Control Strategy of Speed Segmented Variable Constant Power Powertrain of Electric Construction Machinery." Applied Sciences 12, no. 19 (September 27, 2022): 9734. http://dx.doi.org/10.3390/app12199734.
Повний текст джерелаАнотація:
Energy conservation and emission reduction have become a global development consensus. Traditional construction machinery driven by an engine has high energy consumption and poor emission. Electric construction machinery is considered to be one of the main trends in the future due to its zero emissions by canceling the engine and using the motor-driven hydraulic system. However, most of the existing electric construction machinery works through the motor to simulate the engine without considering the regulation characteristics of the motor. Therefore, although the existing electric construction machinery improves the emission and the energy efficiency of the power system to a certain extent, the control of the motor and hydraulic systems can still be further optimized. The energy efficiency of the whole machine can be maximized. Based on the LUDV system of construction machinery, a control strategy based on motor speed classification and variable constant power can automatically identify the actual working conditions of the electric excavator and adjust the starting pressure of the constant power valve, to change the constant power range of hydraulic pump and achieve the goal of adapting to the working conditions of power system, is proposed. Simulation and experiments are carried out to verify the feasibility of the proposed control strategy. The results show that the speed classification and variable constant power control system can effectively realize the hierarchical regulation of motor speed and provide relatively stable speed input for the hydraulic system. Moreover, the current working condition can be identified through the pump outlet pressure. The adaption of the working conditions can be realized through the proportional reducing valve by adjusting the starting pressure of the variable constant power valve.
2
Umnitsyn, A. A., and S. V. Bakhmutov. "Evaluation of compliance with the current standards requirements regarding the anti-lock braking system effectiveness of an electric vehicle with mixed braking support." Trudy NAMI, no. 2 (July 4, 2022): 51–59. http://dx.doi.org/10.51187/0135-3152-2022-2-51-59.
Повний текст джерелаАнотація:
Introduction (statement of the problem and relevance). In accordance to the current standards the requirements were assessed: for the braking process efficiency of M1vehicles category using an antilock braking system (ABS) and the combined possibility control of two actuators - electric machines installed in the vehicle driving wheels as well as the electro-hydraulic modulation pressure unit in the hydraulic circuit of the working brake cylinders.The purpose of the study was to evaluate the effectiveness of the newly developed ABS algorithm in accordance with current standards and additional requirements.Methodology and research methods. The braking process computer simulation of a M1 vehicle category equipped with four electric motors and an electro-hydraulic braking system was carried out. As a result of calculations, the obtained braking parameters were to be compared and evaluate according to the requirements of UN Regulation No. 13H, as well as evaluate the braking efficiency parameters.Scientific novelty and results. The effectiveness of the developed control algorithm for the ABS actuators (electro-hydraulic unit and electric machines in the drive wheels) has been proven in terms of meeting the requirements of UN Regulation No. 13H. Studies showed an efficiency improvement of the ABS operating due to the proposed algorithm, when compared to foreign-produced analogues.The practical significance of the work is the proof of the developed algorithm efficiency for M1 electric vehicles category.
3
Paramonov, Aleksey, Safarbek Oshurbekov, Vadim Kazakbaev, Vladimir Prakht, and Vladimir Dmitrievskii. "Study of the Effect of Throttling on the Success of Starting a Line-Start Permanent Magnet Motor Driving a Centrifugal Fan." Mathematics 10, no. 22 (November 18, 2022): 4324. http://dx.doi.org/10.3390/math10224324.
Повний текст джерелаАнотація:
Direct-on-line synchronous motors are a good alternative to induction motors in fluid machinery drives due to their greater energy efficiency but have the significant disadvantage of limiting the maximum moment of inertia of the loading mechanism to ensure their successful and reliable start-up. This disadvantage is critical in centrifugal fans with a massive steel impeller. In this article, using a mathematical model, the dynamics of starting and synchronizing a permanent magnet synchronous motor fed directly from the mains as part of a fan drive are studied. The simulation results show the possibility of increasing the maximum moment of inertia of the load at the successful start-up of a direct-on-line synchronous motor by adjusting the hydraulic part of the fan pipeline by means of throttling. The conclusions of this paper can be used when selecting an electric motor to drive industrial fans and can contribute to wider use of energy-efficient synchronous motors with direct start-up from the mains.
4
Niraula, Abinab, Shuzhong Zhang, Tatiana Minav, and Matti Pietola. "Effect of Zonal Hydraulics on Energy Consumption and Boom Structure of a Micro-Excavator." Energies 11, no. 8 (August 10, 2018): 2088. http://dx.doi.org/10.3390/en11082088.
Повний текст джерелаАнотація:
This paper investigates the effect of extra weight caused by the Direct Driven Hydraulics (DDH) in a micro-excavator. These projects are investigating the implementation of zonal or decentralized hydraulics for non-road mobile machinery (NRMM) and stationary industrial applications. The benefit of DDH is the combination of electric and hydraulic technologies in a compact package compared to conventional hydraulics, which enables a reduction of potential leakage points, flexible tubing, and boosting of the system efficiency due to switching to direct pump control instead of a loss-generating conventional valve-based control. In order to demonstrate these benefits for the excavator case, this paper proposes a system model approach to assess and predict energy consumption of the zonal hydraulics approach implemented with DDH in various working cycles, complemented by a structural analysis. The finite element analysis utilized for this demonstrated that the extra weight and selected location of DDH units do not negatively affect the structure of the excavator. Simulation results demonstrated that the energy consumption is approximately 15% higher with extra weight added by the three DDH units. Although approximately 20% more regeneration energy is produced, taking into account the regeneration energy, the increases in energy consumption are about 12%.
5
Strilets, O., V. Malashchenko, and V. Strilets. "DYNAMIC MODEL OF SPEED CHANGE CONTROL DEVICE WITH DIFFERENTIAL GEAR AND CLOSED-LOOP HYDROSYSTEM VIA CARRIER." Scientific Bulletin Kherson State Maritime Academy 1, no. 22 (2020): 131–41. http://dx.doi.org/10.33815/2313-4763.2020.1.22.131-141.
Повний текст джерелаАнотація:
The purpose of the study is to build a dynamic model of the speed change device including a differential gear and a closed-loop hydraulic system, where the driving link is a sun gear driven by an electric motor, while a closed-loop hydraulic system is connected to the carrier and can change its speed due to changes in system’s throughput, the ability of the fluid to move across the hydraulic system, so that the necessary law of motion on the driven link - the ring gear can be obtained. The analysis of recent publications has revealed that the research of new speed control devices with a differential gear and a closed-loop hydraulic system through the carrier pays much attention to their structure, principle of operation, and the change in speed, that has been confirmed by analytical and graphical dependences. In addition, energy efficiency and self-braking of such devices has been studied by determining the coefficient of performance efficiency. The dynamics of such devices is waiting to be resolved. It will allow us to develop methods to reduce the impact of dynamic loads on the mechanical drives of machines when changing speed. The article proposes a mathematical model of the movement of a mechanical system for new devices for changing the speed using a differential gear with a closed-loop hydraulic system through the carrier. For this purpose, the equation of dynamics by the Lagrange method of the second kind has been used and the equation of kinetic energy of the system has been formed. Since there is a relationship between the speeds of all links in the differential gear, the expression for the kinetic energy of the system has been described by the speed of the driving and driven links, i.e., by the speed of the sun gear and the ring gear. The result of solving the Lagrange equation in partial derivatives is a system of two differential equations with unknown derivatives of the velocities of the sun gear and the ring gear. The obtained results are the basis for further computer simulation and quantitative analysis to assess the performance of such devices and select the necessary closed-loop hydraulic system to control speed changes. Based on the dynamic model, it is possible to compose and solve the equations of dynamics for typical cases of changes in the torque resistance: long-term shock, short-term shock and significant overload, up to the stop of the machine.
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Chen, Linlin. "Hydraulic Lifting and Rotating System Lifting Machinery Transmission Control Design." Mobile Information Systems 2022 (June 7, 2022): 1–6. http://dx.doi.org/10.1155/2022/4617971.
Повний текст джерелаАнотація:
With the continuous improvement of the level of intelligence in the construction machinery industry, as one of the core technologies in the hydraulic lifting and rotating system, the lifting transmission control system has become a key factor in determining the performance of the elevator. As a hydraulic lifting machine with high protection level and powerful functions, the mechanical transmission controller has been recognized by the market. This study is based on the design of lifting machinery transmission control of hydraulic lifting and rotating system and studies the lifting mechanism transmission system in the hydraulic lifting and rotating system required for engineering operation. According to the functional characteristics of the transmission controller of the lifting mechanism, the control system scheme is designed. On this basis, the system design of the lift machinery transmission control and, according to this design, the functions of driving speed control and transmission mode switching are studied. Starting from the movement mechanism of hydraulic continuous lifting technology, this research carried out the principle design of mechanical transmission control, related calculations, selection of hydraulic components, corresponding simulations, structural design of mechanical transmission, and tests of hydraulic power systems. Finally, the control system was verified through simulation experiments, and technical difficulties such as the liquid supply mode of the large-flow system, the selection of standby working conditions, and the reliability and safety design were solved. It can be seen from the simulation results that, as the displacement ratio increases, the system efficiency increases, reaching more than 70%. When the valve opening reaches 20° when the valve port is closed, the efficiency of the power control valve reaches 95%. It can be seen that the control system established in this study has more advantages in power and economy. The transmission control system of hoisting machinery designed in this study can give greater play to its transmission efficiency and significantly reduce the working time and intensity of the operator.
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Yang, Jian, Tiezhu Zhang, Hongxin Zhang, Jichao Hong, and Zewen Meng. "Research on the Starting Acceleration Characteristics of a New Mechanical–Electric–Hydraulic Power Coupling Electric Vehicle." Energies 13, no. 23 (November 28, 2020): 6279. http://dx.doi.org/10.3390/en13236279.
Повний текст джерелаАнотація:
To simplify the layout of a purely electric vehicle transmission system and improve the acceleration performance of the vehicle, this paper utilizes the characteristics of the large torque of a hydraulic transmission system and proposes a new mechanical–electric–hydraulic dynamic coupling drive system (MEH-DCDS). It integrates the traditional motor and the swashplate hydraulic pump/motor into one, which can realize the mutual conversion between the mechanical energy, electrical energy, and hydraulic energy. This article explains its working principle and structural characteristics. At the same time, the mathematical model for the key components is established and the operation mode is divided into various types. Based on AMESim software, the article studies the dynamic characteristics of the MEH-DCDS, and finally proposes a method that combines real-time feedback of the accumulator output torque with PID control to complete the system simulation. The results show that the MEH-DCDS vehicle has a starting time of 4.52 s at ignition, and the starting performance is improved by 40.37% compared to that of a pure motor drive system vehicle; after a PID adjustment, the MEH-DCDS vehicle’s starting time is shortened by 1.04 s, and the acceleration performance is improved by 23.01%. The results indicated the feasibility of the system and the power performance was substantially improved. Finally, the system is integrated into the vehicle and the dynamic performance of the MEH-DCDS under cycle conditions is verified by joint simulation. The results show that the vehicle is able to follow the control speed well when the MEH-DCDS is loaded on the vehicle. The state-of-charge (SOC) consumption rate is reduced by 20.33% compared to an electric vehicle, while the MEH-DCDS has an increased range of 45.7 m compared to the EV. This improves the energy efficiency and increases the driving range.
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Sun, Yue, Hongxin Zhang, and Jian Yang. "The Structure Principle and Dynamic Characteristics of Mechanical-Electric-Hydraulic Dynamic Coupling Drive System and Its Application in Electric Vehicle." Electronics 11, no. 10 (May 18, 2022): 1601. http://dx.doi.org/10.3390/electronics11101601.
Повний текст джерелаАнотація:
To solve the problem of the low recovery rate of braking energy and the short driving range of electric vehicles, a novel mechanical-electric-hydraulic dynamic coupling drive system (MEH-DCDS) is proposed in this article. MEH-DCDS is a new power integration device that allows electric, mechanical, and hydraulic energy to be converted mutually. It comprises a swash plate plunger pump/motor and a permanent magnet synchronous motor. This article explains the structure and working principles of MEH-DCDS. We describe the dynamic characteristics of MEH-DCDS and analyze the pump and hydraulic motor in the MEH-DCDS hydraulic module. The simulation results show that the flow variation of the MEH-DCDS hydraulic module accords with the design concept of MEH-DCDS, and the pressure variation of high and low pressure accumulators also accords with the theoretical situation. The energy flow of Mechanical-Electric-Hydraulic Power Coupling Electric Vehicle (MEHPC-EV) under different working modes is expounded, and the mathematical model of its key components is established. Based on AMESim and Simulink, the article establishes a vehicle simulation dynamic model. The dynamic performance of MEHPC-EV in UDDS is analyzed by co-simulation. The simulation results show that the application of MEH-DCDS in electric vehicles is feasible. MEHPC-EV reduced battery energy consumption by 26.18% compared to EV. The research in this paper verifies the accuracy and superiority of the system, which has a significant reference value for the development and study of electric vehicles in the future.
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Yang, Yang, Zhen Zhong, Fei Wang, Chunyun Fu, and Junzhang Liao. "Real-time Energy Management Strategy for Oil-Electric-Liquid Hybrid System based on Lowest Instantaneous Energy Consumption Cost." Energies 13, no. 4 (February 11, 2020): 784. http://dx.doi.org/10.3390/en13040784.
Повний текст джерелаАнотація:
For the oil–electric–hydraulic hybrid power system, a logic threshold energy management strategy based on the optimal working curve is proposed, and the optimal working curve in each mode is determined. A genetic algorithm is used to determine the optimal parameters. For driving conditions, a real-time energy management strategy based on the lowest instantaneous energy cost is proposed. For braking conditions and subject to the European Commission for Europe (ECE) regulations, a braking force distribution strategy based on hydraulic pumps/motors and supplemented by motors is proposed. A global optimization energy management strategy is used to evaluate the strategy. Simulation results show that the strategy can achieve the expected control target and save about 32.14% compared with the fuel consumption cost of the original model 100 km 8 L. Under the New European Driving Cycle (NEDC) working conditions, the energy-saving effect of this strategy is close to that of the global optimization energy management strategy and has obvious cost advantages. The system design and control strategy are validated.
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Chen, Yihui, Tiezhu Zhang, Hongxin Zhang, Zhen Zhang, Qingxiao Jia, Hao Chen, Haigang Xu, and Yanjun Zhang. "Study on the Effect of Hydraulic Energy Storage on the Performance of Electro-Mechanical-Hydraulic Power-Coupled Electric Vehicles." Electronics 11, no. 20 (October 17, 2022): 3344. http://dx.doi.org/10.3390/electronics11203344.
Повний текст джерелаАнотація:
In order to address the problems of low energy storage capacity and short battery life in electric vehicles, in this paper, a new electromechanical-hydraulic power coupling drive system is proposed, and an electromechanical-hydraulic power coupling electric vehicle is proposed based on this system. The system realizes the mutual conversion between mechanical energy, hydraulic energy, and electric energy through the electromechanical–hydraulic coupler. This paper describes the structural characteristics and working principles of the system and analyzes the different working modes during the driving of the vehicle. We established a mathematical model of the hydraulic accumulator and the hydraulic pump and motor. Based on the vehicle dynamics model, an AME Sim vehicle model was built and the vehicle, and the relevant hydraulic parameters were set in combination with the actual situation. The braking energy recovery and release process was jointly simulated by AME Sim and Simulink. The simulation results show that the hydraulic accumulator size of the accumulator volume can influence the maximum working pressure of the accumulator and the SOC of the vehicle battery, and it is verified that 35 L is the best capacity. This study has an important reference value for matching electromechanical–hydraulic coupling parameters of electric vehicles.
Книги з теми "Hydraulic machinery Electric driving Computer simulation"
1
ZnO bao mo zhi bei ji qi guang, dian xing neng yan jiu. Shanghai Shi: Shanghai da xue chu ban she, 2010.
Знайти повний текст джерелаТези доповідей конференцій з теми "Hydraulic machinery Electric driving Computer simulation"
1
Baharudin, Ezral, Jarkko Nokka, Henri Montonen, Paula Immonen, Asko Rouvinen, Lasse Laurila, Tuomo Lindh, Aki Mikkola, Jussi Sopanen, and Juha Pyrhönen. "Simulation Environment for the Real-Time Dynamic Analysis of Hybrid Mobile Machines." In ASME 2015 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/detc2015-47024.
Повний текст джерелаАнотація:
The interest in using hybrid technology in Non-Road Mobile Machinery (NRMM) has increased significantly in the late 2000s due to tightening emission regulations (Tier 4). In general, utilization of hybrid technology can simplify the vehicle driveline compared to conventional mechanical and hydraulic power transmissions. On the other hand, hybrid technology and its different driving modes and multiple power sources creates new challenges in the design process. Many industries have used co-simulation and virtual prototyping approaches successfully as a development and diagnostic tool. However, it is still rarely used in the design of hybrid mobile machines. This is due to the fact, that the computer analysis of a mobile machine is a multidisciplinary task which requires a deep knowledge in several engineering areas. In this paper, a novel real-time co-simulation platform is presented that couples multi-body dynamics based physics modelling and Matlab/Simulink–based hybrid driveline modelling. The presented approach enables a fast and accurate virtual prototyping tool to calculate dimension hybrid driveline components and test various hybridization concepts.