Optimization Of Shuttle Car Steering Mechanism Based On Genetic Algorithm

As an important auxiliary transportation equipment,the trackless shuttle car works between the Continuous Miner and the Crusher.The trackless shuttle car transports the coal that is collected by Continuous Shearer and unloads the coal into the hopper of the Crusher.It is necessary to steer during the trackless shuttle car is working under the mine.The steering mechanism plays a key role when the car is steering.It is very important for the shuttle car to have smaller steering radius and steering resistance.At present,most of the studies of steering mechanism are based on the optimization of the minimum error between the actual deflection angle and theoretical deflection angle.However,there is not much research on the optimal design of two objective functions that are the minimum steering radius and the minimum resistance torque.Because the genetic algorithm has many advantages compared with other optimization methods.This paper uses genetic algorithm to optimize the steering radius and the resistance torque by calculating optimum design parameters that are the kingpin center distance and the maximum angle of steering wheel.The researches of this paper on the steering mechanism of TY9 FB shuttle car are as follows:1.The mathematical model of the steering mechanism of shuttle car and the desired objective function of the design optimization are established.First,theworking principle of the shuttle car’s steering mechanism is analyzed when it is turning.Then mathematical models of steering resistance torque and turning radius are built according to their analysis charts.The influence factors were analyzed,such as the kingpin center distance and the ultimate turning angle.This paper uses the kingpin center distance and the maximum angle of steering wheel as the optimum design parameters and uses the minimum steering radius and the resistance torque as the optimal objective functions.2.Used the genetic algorithm to optimize the objective function.First of all,the working principle of genetic algorithm is understood deeply.And then,the MATLAB genetic algorithm is used to optimize the objective function.After the optimization,the optimal values and the corresponding optimal parameter values of the objective function are obtained.The structural parameters of steering mechanism before and after optimization are compared.3.The virtual prototype model of shuttle car is established.The model of shuttle car before optimization is created by UG NX7.0 software according to the mechanism sizes provided by the institution.The optimized shuttle car model is established based on genetic algorithm to optimize the parameters of the steering mechanism.The three-dimensional solid model is imported into the kinematics analysis software ADAMS,and the quality,tires,road surface,constraints and contacts are added to create the virtual prototype model before and after the optimization of shuttle car.4.The simulation analysis of the steering mechanism of shuttle car before and after optimization is carried out.The simulation curves of steering radius and steering resistance torques before and after optimization are obtained through the motion simulation.The data is collected through the curves,and the data before and after optimization is compared and analyzed.5.The finite element analysis of the tie rods that belong to the steering mechanism before and after optimization is carried out.Because of the importance of the tie rod in the four bar linkage mechanism,the finite elementanalysis is carried out for the tie rods before and after optimization,and the maximum stress and the maximum deformation before and after optimization are analyzed and compared.This research optimizes the steering resistance torque and turning radius of the TY9 FB shuttle car.It uses the efficient design method of genetic algorithm and the 3D modeling software and dynamic analysis software to make the shuttle car has smaller turning radius and the steering resistance torque.After the optimization,the mobility and maneuverability of the shuttle car are improved.Efficient optimization method and the modeling and simulation software are used to make up for the high cost and long cycle of the research of the traditional optimization design.It provides a new method and direction to optimize the turning radius and steering resistance torque of the steering mechanism.