Reserch On Simulation Of Hazardous Chemicals Transportation And Key Technologies Of The Simulator

In order to technically find the fundamental solution to the security issues of hazardous chemicals in production, transportation, storage and the using of the full life cycle, China has carried out technological researches for a variety of hazardous chemicals in the areas of security monitoring and tracking system. And testing the performance of the sensor and its integrated system is the basis of protecting the research, industry and application of the sensors and systems monitoring. Nowadays people use real tank truck or freight transported by land or by sea to test the performance of the sensor system and verify the true accuracy and reliability of the sensors under different conditions. This kind of testing has the defects of a long test cycle, high test costs, high risk and limited test conditions. And it's difficult to repeat the experiment and analyze as performance problems appear.For the shortcomings of the real test in land or sea, the paper develops loop simulation and experimental systems for the transportation of hazardous chemicals. The motion simulator in the system using Hexaglide parallel mechanism with 6DOF simulates the actual operation state of the travel to experiment and verify the reliability and safety of hazardous chemicals monitoring and micro-system trackingThe system model of tank truck and trailers was established by using ADAMS software to form a functional virtual prototyping. The virtual prototype was conducted for rotary vehicle dynamic simulation experiments, the steering wheel angle step input simulation, Steering wheel angle pulse input simulation experiments and steering light simulation experiments. Simulation data correctly followed the rules and requirements of the stability of vehicle operation and evidenced that the virtual prototype model is reasonable. Take the Interception of both island and lane conditions to make simulation and real car experiment. It turns out that simulation experiment result showed High goodness of fit corresponding to the parametric curves of the real vehicle road test .The numerical error was less than 6%. It validates the virtual prototype model of the vehicle and the reference prototype, the consistency of the dynamic response. Based on double lane, up and down the ramp, rough road, uneven pavement, under special conditions typical simulation shows the effectiveness of virtual prototyping simulation lay a good foundation for simulation platform design.On the basis of spectral analysis method, directional spectrum is used instead of the wave spectrum to achieve the calculation of oscillating movement of the ship and establish a simulation system of a marine-based oscillations. To simulate different boat speed, wind speed, ship heading by using a ship vibration simulation system and compare the simulation results and those of the Seakeeper simulation software under the same conditions to verify the correctness of the simulation system of ship oscillations.At this point the virtual prototype technology, combined with the simulation model under a variety of land and sea transportation conditions generated virtual laboratory conditions for hazardous chemicals'transportation and obtain the input of motion simulator in the corresponding state.According to the need of simulating travel, motion simulator formed by a 6 DOF Hexaglide institutions and the control module use AC servo motor drive, ball screw and guide rails transformed the motor rotation into linear motion of the slider. It provides pure movement of one direction in the structure, and the amount of movement in this direction is only limited by the length of the rail, the moving space can be easily expanded, if the moving direction and the direction of the travel are the same, then it's possible to get a longer deceleration time, and better simulate the real movement of travel. After having determined the configuration of motion simulator the kinematics analysis, as well as the research institutions pose inverse algorithm, was conducted, and the mapping of speed and acceleration was established. Based on the kinematic analysis, further analysis of the workspace and dexterity was made to make the results more practical engineering. The definition of the core work space used most frequently in engineering was given, and its distribution on the dexterity was simulated. For the completion of the synthesis of the simulation platform, in-depth effect analysis of body parameters was also made on the location of the work space, core work space and the institution dexterity. On this basis, the proposed optimization process completed the institutions optimization and verified the excellent results of the optimization. Finally, the proposed prototype is fabirated, on which the software and hardware of the control system are designed. The correctness and feasibility of programming is validated based on the simulation experiments in the TwinCAT environment. Motor control experiments verified the capability of motor position tracking input reference signals. The motion regeneration experiments of the actual input signal and virtual input signal verify that the actual output displacement curve of various input signals and the virtual input signal under actual conditions matched the given input displacement curve very well.The proposed system features a high performance of position tracking, which can be used for simulating various vehicles working conditions.