Simulation Model Of Hydraulic System Research Articles

小型多功能农用底盘液压驱动系统的设计与试验

In view of the problems of the output power and operation, when the multi-function machine in hilly and mountainous areas driving in the field, the hydraulic control drive system of small multi-function agricultural hydraulic chassis is designed. The key components of the hydraulic drive system were selected and matched. The hydraulic system simulation model was established in AMESim simulation analysis software, and the dynamic analysis of the hydraulic system operation under different conditions is carried out. The simulation analysis results show that the hydraulic system has a large impact and vibration when it is started instantaneously, and the hydraulic system has smaller impact and vibration when it is started stably. It is consistent with the actual working state of the hydraulic chassis. Under the two starting controls, the maximum flow of the hydraulic pump is 50L/min, the motor torque is about 440N • m, and the motor stable pressure is 6Mpa, the motor speed is 96 r/min, which is within the bearing range of the hydraulic components. The simulation output parameters are basically consistent with the theoretical calculation results, and meeting the design requirements. The chassis performance test results show that the maximum crossing height of the chassis is 200mm, the crossing width is 300mm, the maximum deviation of high-speed straight driving is 2.57m, it can stably pass 20° slope, and the operation is stable and the steering is flexible. All performance parameters can better meet the requirements of chassis operation in hilly and mountainous areas.

Simulation of Hydraulic Suspension System of Electric Tractor Based on Matlab-AMESim

For electric tractor engine power output characteristic, a load sensitive hydraulic suspension system in front of the valve is designed. In order to meet the operation requirements of different soil conditions when the electric tractor is plowing, and to improve the dynamic response characteristics of the system and the uniformity of tillage depth, a fuzzy PID based resistance-position combined adjustment tillage depth control strategy is designed. The hydraulic system simulation model is established based on AMESim, and the fuzzy PID controller model is established using Matlab. Through the joint simulation of AMESim and Matlab, the control performance of hydraulic suspension system of electric tractor with different resistance-position comprehensive proportional coefficients is analyzed. The simulation results show that the control strategy of tillage depth based on fuzzy PID is more responsive and anti-interference strong ability, the resistance-position combined adjustment has higher adaptability to different soil changes and operation methods than a single resistance adjustment or position adjustment.

AMESim simulation and energy control of hydraulic control system for direct drive electro-hydraulic servo die forging hammer

The application of direct drive electro-hydraulic servo system in die forging hammer is studied, and a new type of direct drive electro-hydraulic servo control die forging hammer is proposed. The impact energy of forging hammer is modelled by analytic method, and the relationship between impact energy E and motor speed n is simulated and analysed by Simulink software. The AC permanent magnet synchronous servo motor model and the hydraulic system simulation model are established on AMESim, and the system performance curve, the pump output flow curve and the servo motor speed curve are obtained. A wavelet neural network PID control algorithm is proposed to realise closed-loop control of pressure and speed of direct drive electro-hydraulic servo die forging hammer. A combined simulation model of AMESim and Simulink is built. The hardware-in-the-loop simulation experiment of the control system is designed. The simulation and experimental results verify the correctness of the scheme.

Performance Assessment based on Health Baseline and MML for Hydraulic System

In recent years, with the wide application of hydraulic system, the performance assessment for hydraulic system has gained significant attention. However, a few studies focus on health assessment and traditional methods such as distance metric functions have limitation because different metric functions are only suitable for specific requirements. A scheme of performance degradation assessment based on health baseline and metric learning is proposed in this study. First, General regression neural network (GRNN) based observer is employed as health baseline to generate the estimated output of hydraulic system. The residual is obtained by calculating difference between the actual and estimated output. Then, time domain features are extracted from residual error. After that, apply the Mahalanobis metric learning (MML) to find a suitable metric adaptively for the training data set regarding distance. Finally, the distance between current status and normal status is normalized into confidence value (CV) to quantize the performance. A simulation model of hydraulic system is established based on HyPneu and Simulink, then gradual fault are injected to validate the proposed method. The results of experimental analysis demonstrate the effectiveness and adaptability of the performance degradation assessment method.

Research on the Hydraulic System of the Space Launch Tower’s Cable Pendulum

A hydraulic system simulation model was established suitable for space launch tower’s cable pendulum. And the influences between hydraulic system parameters with working performances were analyzed base on the model. The results show that the interactivity of load, internal leakage of cylinder, characteristics of control valve and relief valve have great effects on the system. Single or combined action of several typical factors can cause abnormal motions of the system. According to the pressure, flow, load and velocity of the system or relative signals in the input and output ports of one valve, some existed problems can be identified compared with the theoretic normal value. This work mainly presents a conduct for the characteristic analysis of the hydraulic system. By selecting appropriate parameters, checking the load and the working performances of some key components, it is effective to master the operation condition.

Analysis of a priority flow control valve with hydraulic system simulation model

Mobile direction control valves are hydraulic system components which transfer the hydraulic oil to the accelerator to control the system. These components are mostly used in tractors, forklifts, and backhoe loaders. Forward or backward movement of the valve spools determines the motion direction and speed of the equipment. However, in some cases, using the flow control valves is an effective way to determine the speed of movement. For a tractor with multiple actuators, direction control valves with priority flow control should be used to supply low flow rate without load dependency to the actuator. In this paper, priority flow control valve is modeled using one-dimensional simulation technique and simulation results are validated with the experimental results.

Design and Simulation of the Hydraulic Synchronous Control System of the Upper Roller in Bending Machine

This paper sketches the overall structure of the hydraulic system of bending machine, and designs the hydraulic synchronous control system of the upper roller in bending machine. Then making use of AMEsim software to establish hydraulic system simulation model to analyze the pressure, velocity, displacement and other parameters of hydraulic cylinders in two cases when in open loop and closed loop system. After that, use PID algorithm to simulate the upper roller of bending machine in hydraulic closed loop synchronous system, which verifies that it can meet the motion requirements and get a higher synchronous precision.

Dynamic Characteristics Simulation of Radiator Fin Blanking Machine Hydraulic System

The hydraulic system of radiator fin blanking machine plays a leading role in the radiator fin production. Its performance directly affects the efficiency and quality of product line. The hydraulic system of blanking machine for radiator was composed of blanking circuit and support circuit. The hydraulic system realizes the cutting action using the reciprocating movement of the hydraulic cylinder. The hydraulic system simulation model was built by the simulation software of AMESim in this paper. Using the simulation model, the simulation analysis of the dynamic characteristics of hydraulic system were completed. The hydraulic system has been through the debugging and put into production, running in good condition.

Simulation and Experimental of Shifting Performance of Construction Machinery

The main objective to study shift buffer impact of shifting process of construction machinery.introduces the working principle of main valve and wet multi-clutch,and developing a mathematical model and AMESim simulation model. analyzes the characteristics of pressure changes during the shift, buffering characteristics and impact on the performance characteristics, and experimental verification. The results showed that: the shift hydraulic system simulation model accurately credible; good performance of the system can effectively reduce shift jerk.

Design and Analysis of Power Head Axial Servo Loading System

Power head is the main motive mechanism of rotary drilling rig. High axial pressure and high frequency is one of its typical working conditions. Axial loading test is a key point in power head performance tests. Overall design, system theoretical analysis and simulation of power head axial loading system were carried out. The bond graph model and state equations of power head axial servo loading system were built on the basis of bond graph theory. Hydraulic system simulation model was constructed and axial steady-state and dynamic loading simulation was made by use of hydraulic simulation software. The maximum axial steady-state load is up to 450kN and the dynamic frequency is 20Hz, both of which can meet the technical requirements. The simulation validates the feasibility of the scheme about power head axial loading system and it provides theory and practice guidance for perfecting the loading system. DOI: http://dx.doi.org/10.11591/telkomnika.v11i10.3390

Modeling and Simulation of Large Erecting System Based on Virtual Prototyping

The virtual prototyping model of large erecting system is established by means of ADAMS and AMESim software. Based on the theory of multi-rigid body dynamic, the topology description of erecting system is given. Dynamics analysis model of large erecting system is built in ADAMS software, and mechanics character is given through the analysis of the erecting system. The simulation model of hydraulic system is built using AMESim software. Collaborative simulation based on the interfaces of ADAMS and AMESim is discussed, and the dynamic characteristic of the erecting system is simulated based on the interfaces of ADAMS and AMESim. Some simulation results are given to demonstrate the validity of the proposed model. This method provides a new approach for the modeling and simulation of electro-mechanical systems.

Design and Analysis of Hydraulic Control System for Pipe Storage and Handling System

This paper research the hydraulic control system of pipe storage and handling system. The pipe storage and handling system (PSHS) is the key parts on rig to handle the drilling pipe and it can improve the efficiency during the drilling works. The hydraulic system of pipe storage and handling system have designed according to automatic round-trip operation in drilling engineering. The mathematical modeling of hydraulic components in PSHS have established and analyzed. The simulation model of hydraulic system of PSHS is also built and simulated to analysis the characteristics of reversal valve operation, Hydraulic pressure adjusting operation, piston speed control and state of accumulator based on the AMESim. The results prove that the operations of pipe storage and handle such as pipe storage, pipe clamping, pipe lifting, pipe transfer and pipe joint can be accomplished drive by hydraulic system. Meanwhile, AMESim have great views to research the geosciences equipment.

Study on Rotary Characteristics about Light Type Hydraulic Excavator

In order to analyze rotary characteristics of light type hydraulic excavator, according to prototype’s real parameters, a 3-D model of excavator was built using Pro / E design software, and import into the software ADAMS to build the virtual excavator, while using the AMEsim software to build the main components of multi-way valve characteristics model, etc.. After the simulation model of hydraulic system was developed, rotary characteristics were simulated and researched through experiments with different moments of inertia which change in the heavy-load operating mode. On the basis of the analysis and comparison with the results of simulation and experiments, the law between hydraulic system pressure variation and energy consumption about light type hydraulic excavator was obtained with different moments of inertia when excavator rotating.

Hydraulic System Optimization and Dynamic Characteristic Simulation of Double Clutch Transmission

Abstract The article focused on a dual-clutch automatic transmission of its hydraulic system. We can calculate the structure size of each body through theory and practical algorithm. The dynamic simulation model of hydraulic system of dual- clutch automatic transmission was established. Then the dynamic characteristics of the system were simulated. And to analysis the simulation results and test results to see the simulation model can be used with the test results. Analysis of simulation results of DCT hydraulic system pressure and flow, as well as different structural parameters of the hydraulic system.

Dynamic Simulation of Hydraulic Truck Crane Hoisting System Based on AMESim

This paper is made from a certain type of truck crane hydraulic lifting mechanism system as an object, then the second lifting working condition is analyzed. With AMESim, according to the hydraulic system diagram building lifting mechanism hydraulic system simulation model, hereby corresponding simulation conditions is set and the effects of secondary slide response on input signal, hoisting load, discharge and speed of pump, fluid resistance of one-way throttle is studied. This research on truck crane hoisting mechanism hydraulic system provides the theory basis for the design improvement, the relevant research methods and means have reference on the research of other engineering machinery hydraulic system working characteristics.

Design and dynamic simulation of hydraulic system of a new automatic transmission

A new hydraulic system of a novel automatic transmission (AT) was designed. The dimension and structure of valves and cylinders were designed by theoretical calculation. The dynamic simulation model of hydraulic system of AT was established by ITI-SimulationX. Simulation results and theoretical design results were compared to confirm the simulation model. Based on the confirmed simulation model, the simulation results of pressure and flow of the hydraulic system were analyzed. The dynamic simulation method is very helpful for designing and analyzing the performance of hydraulic system and further optimization design. The theoretical design method and dynamic simulation model are feasible for the real industrial applications. The research results can be used in hydraulic system design and optimization.