Advanced Materials Research Vols. 889-890

Abstract: It is very important to simulate driver's manipulation for people - car - road closed loop simulation system. In this paper, the driver model is divided into two parts, linear vehicle model is used to simulate the driver's driving experience, and closed-loop feedback is used to characterize the driver's emergency feedback. The lateral acceleration of vehicle is used as feedback in closed loop control. Simulation results show that the smaller lateral acceleration requires the less closed-loop feedback control. The driver model can accurately track the target path, which can be used to simulate the manipulation of the driver. The driver model can be used for people - car - road closed loop simulation to evaluate vehicle handling stability.

Abstract: An ECU hardware-in-loop simulation system for electronic-controlled engine in better real-time and augmentability is built. We establish a dynamic average model of the electronic-controlled engine and put emphasis on analysing its fuel and oil slick modelmass flow model of intake manifold air and the sub-model of inlet manifold pressure. The engine model has fewer parameters and lower orders in order to adjust and set parameters; We propose a building program based on virtual instrument technology and adopts the chip TMS320F2812-DSP to design a signal interface system used to achieve the simulation for sensor signal and the collection of ECU output signal. Through the verification of simulating experimental data, it's proved that the established model of electronic-controlled engine has suitable steps and good real-time performance, building a good foundation for further experimental design and research in the future.

Abstract: In order to improve the mathematical models accuracy of the electro-hydraulic servo loading system from the high-speed motorized spindle reliability test bench. This paper establishes the mathematical model based on the dynamic characteristics of the test bench, then establishes discrete mathematical model of the system based on the Z-transform, and finally uses particle swarm optimization (PSO) algorithm to identify the parameters of the discrete model. Additionally, the least square method is applied to identify the parameters of the model for measuring the PSO algorithm parameter identification capability in our paper. The experimental results show that the mathematical model, identified by the PSO algorithm, can simulate the loading process very well under the strong interference signals, and the result is better than that gotten by the least square method, which proves that the PSO algorithm has high identification accuracy and better capability in parameters identification .

Abstract: In this paper, two new nonlinear difference inequalities are considered, where the inequalities consist of multiple iterated sums and composite function of nonlinear function and unknown function may be involved in each layer. Under several practical assumptions, the inequalities are solved through rigorous analysis, and explicit bounds for the unknown functions are given clearly. Further, the derived results are applied to the stability problem of a class of linear control systems with nonlinear perturbations.

Abstract: An intelligent control system for LED headlamp was developed. This system features include two features : LED lamp system of self-adaptive control and use of LED lighting realize visible optical communication. The realization of the control system of intelligent lights include: LED headlights Lord adaptive dimmer, high power LED lamp overheating protection, light and automatic operation, front fog lamps and intelligent control of the lights. Use LED lamp as light lighting equipment, a traditional light it is difficult to have the power to control and adaptive control mode. Based on the optical communication technology LED lighting is using PWM signal of high power LED lamp drivers, control PWM LED lights of empty loading to send the information and than realize the visible optical communication. Optical communication has strong; secrecy is small, transport energy loss of harmless, transmission range, etc.

Abstract: The following description illustrates the implementation of an EEG-based Brain Computer Interface (BCI) for control of robotic arm utilizing electroencephalography (EEG) rhythms. The signals are collected with a headset witch denoises and classifies sampling signals adopting Fast Fourier Transform (FFT) and Kalman filter. These signals are deciphered to signals that can be eventually understood by certain machine, and then transmitted to a single-chip system by employing Bluetooth Module. Signals received by end-user machine will be compiled into control commands by MCU system and these commands are used to control actions of a robotic arm. Keywords: electroencephalogram;EEG;brain computer interface;BCI;MCU;robotic arm

Abstract: This paper introduces a noval analog control experimental teaching project using PLC. Different from traditional thought, in this project, the analog signals are input into PLC to operate and control. The ultimate aim is to introduce analog control method to PLC experimental training. The designed experiment integrates analog and logic control, which can make the training course abundant. Such experimental training is close to engineering application and can improve the understanding capability for industry control knowledge. Training practice indicates that such comprehensive experimental project can improve the students practice capability effectively.

Abstract: 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.

Abstract: The motorized spindle is a primate part of the machine tool and its thermal characteristics have great influence on the accuracy of the machine tools. The thermal errors of the spindle of a certain type of precision horizontal machining center were measured with PLC acquisition system. By multivariate linear regression method, the axial thermal error model was built. Online real-time error compensation was implemented by applying the FANUC 18i CNC system external machine coordinate system shift function. A verification method was proposed which include three steps: model validation, compensation validation and experimental machining verification. The accuracy of the model was 84.1%, 64.9% and 49.4% respectively. The quantitative analysis results showed the precision was effectively improved and the compensation method was reliable.

Abstract: With STEP-NC (ISO 14649) being gradually accepted as new standard for programming computerized numerical control (CNC) machine tools, new technologies and computer systems in the design and manufacturing process chain are emerging, and conventional systems are reshaping, to support interoperable and intelligent manufacturing. This paper addresses issues and solutions for the adaptation. In the first place, a strategy for adapting legacy CNC turning machine tools to the emerging standard is presented. In the second place, the new data model is analyzed and a practical way to retrieve and extract manufacturing information from the STEP-NC part program for turning process is presented. In the third place a workable approach to calculating the cutting force and chip load in turning operations is presented based on the mechanistic modeling method. Finally the proposed approach is implemented in a prototype system and tested with an example STEP-NC program for turning, which shows not only the feasibility of the proposed approach for information extraction and process evaluation, but also the possibility of using simple transitional systems to bridge the gap between the sophisticated STEP-NC part program and conventional CNC machines.