【摘 要】
：
The dynamics of turning system which is a nonlinear system normally has great impact on the transportation speed of the vehicle having heavy load and large size
【机 构】
：
School of 4utomation Science and Electrical Engineering
【基金项目】
：
This project is supported by National Hi-tech Research and Development Program of China;教育部高等学校博士学科点专项科研基金
论文部分内容阅读
The dynamics of turning system which is a nonlinear system normally has great impact on the transportation speed of the vehicle having heavy load and large size.The dynamics of turning system depends on control algorithm and its implementation,but the existing control algorithms which having high dynamics in the application of heavy transportation vehicle are complex for realization and high hardware requirement.So,the nonlinear turning system is analyzed for improving its dynamics by researching new efficient control algorithm.The models of electromagnetic valve,hydraulic cylinder and turning mechanical part are built individually to get the open-loop model of the turning system following characteristics analyzed.According to the model,a new control algorithm for heavy transportation vehicle which combined PID with Bang-Bang control is presented.Then the close-loop model of turning system is obtained under Matlab/Simulink environment.By comparing the step response of different control algorithms in the same conditions,the new algorithms validity is verified.On the basis of the analysis results,the algorithm is adopted to implement the turning control system by using CAN field bus and PLC controllers.Furthermore,the turning control system has been applied in one type of heavy transportation vehicle.It reduces the response time of turning system from seconds level to 250 ms,and the speed of heavy transportation vehicle increases from 5 km/h to 30 km/h.The application result shows that the algorithm and turning control system have met all the turning requirements.This new type of turning control algorithm proposed is simple in implementation for fast response of nonlinear and large-scale turning system of heavy transportation vehicle.
其他文献
In view of the importance of gas-liquid two-phase spiral flow and the few research reports at home and abroad,the gas-liquid two-phase spiral flow pattems have
A heuristic algorithm of establishing a minimum coding nodes multicast tree on which a two-channel all-optical network coding scheme can be performed is present
The large-scale bucket foundation with 30 m in diameter and 6 m in height was used as the foundation of wind turbine.The wide-shallow foundation is different fr
The robust global exponential stability of a class of interval recurrent neural networks (RNNs) is studied,and a new robust stability criterion is obtained in t
Pistons used in automobile engines are made of aluminum alloy; and endurance of high pressure and high temperature is required. Recently, high strength pistons
A giant magnetostrictive material(GMM)model is developed based on the hysteretic nonlinear theory.The Gram-Schmidt regression method is introduced to determine
The 3 mol％ yttria stabilized tetragonal zirconia polycrystals (3Y-TZP) powder had three particle size distributions,while the fine one was lower than 100 nm.The
The common characteristics of peer-to-peer (P2P) overlay networks and wireless multi-hop network,such as self-organization,decentralization,hop-by-hop message t
In cooperative cache research domain,most of previous work engage in peer-to-peer systems and distributed systems,but do not involve applying cooperative semant
Taking into account that fuzzy ontology mapping has wide application and cannot be dealt with in many fields at present,a Chinese fuzzy ontology model and a met