Advanced Materials Research Vols. 889-890

Abstract: Elaborated on the method of One Cycle Control (OCC) PWM used on DC speed regulation. The control circuits are designed based on analyses and calculations. Verified by actual debugging, when mathematical model of DC motor is uncertain, the circuits have features such as no speed static error, rapid dynamic response, no need to adjust current loop parameters.

Abstract: This paper studied a giant magnetostrictive fuel injector, which used a giant magnetostrictive actuator as the driving device. The magnetic structure of the giant magnetostrictive fuel injector was designed. The magnetic field of the giant magnetostrictive fuel injector was analyzed by using the finite element method. The total output displacements were computed at various current density levels in driving coil. The results show that the relationship between the input current and the output displacement is approximately linearity. By adjusting the current in driving coil, the output displacement can be linearly controlled, the injector opening size is changed, and then the precise control of stepless fuel flow is realized.

Abstract: As to the ripple problem of the direct torque control system of permanent magnet synchronous motor, this paper present a new method based on the fuzzy logic control. The new method replaces the traditional hysteresis torque controller by a fuzzy logic controller to realize the low ripple effect of the torque and the flux linkage. Also this paper modeling and simulate the new control system using the FIS toolbox provided by the Matlab/Simulink software, and the simulation results shows that the fuzzy control method is far more better than the traditional direct torque control system.

Abstract: In order to improve vehicle acceleration performance on low adhesion roads, an acceleration slip regulation (ASR) is designed with combination control of engine throttle and braking interference based on vehicle platform and fuzzy control algorithm. The principle of ASR system and control logic are described in detail, and the vehicle tests have been carried out. The results show that the controller can effectively prevent excessive spinning of driving wheels on low adhesion roads, and greatly improve the vehicle acceleration performance. It provides a test platform to further study of vehicle active safety control.

Abstract: This article presents a SSDG---based intelligent fault diagnosis method. This method uses five signed threshold value modes to define nodes for carrying quantified information. This method establishes the SDGs of the system and its components, uses the based on rules method to diagnosis, then expands the diagnosing rule bank with logical operators to construct the diagnosing rule bank of the system. Applying in satellite battery system, this method can diagnosis the multiple fault, and batter explain, reworked and faster diagnosis.

Abstract: Having studied Adaptive differential technology of In-wheel motor driving midibus, analyzed the differences in terms of self-adaptive differential between traditional cars and in-wheel motor drive cars by comparison, introduced the method to realize the adaptive differential technology. By building the hardware in loop simulation of model electric bus, simulation including step steering, sine steering and steady turning conditions, we verify the in-wheel motor driving midibus under various driving conditions has good self-adaptive differential performance.

Abstract: Ionic Polymer Composite Material (IPMC) is a flexible material and has revealed many advantages to encourage the scientists and researchers to investigate its characteristics for practical applications in various fields. The ongoing research can be divided into two branches. One deals with the improvement of the material properties to make it more useful and reliable while the other involves the exploration of new application areas. In this paper, Firstly, a new application of IPMC is suggested to actuate a rigid link that can mimic a bionic knee joint for a grass hopper manipulator. Secondly, forward kinematic model is proposed for the manipulator by employing geometric coordinate system method. Lastly, wolfram mathematica software is employed for the simulation of the model. The simulation results based on the model are found very encouraging to lure the article team to carry on the research idea for manufacturing and testing for the comparison of both types of results.

Abstract: This paper discussed the brake performance and reviewed the research progress of the eddy current-hydraulic hybrid brake system. The paper mainly described the design principle of HIL testing bench, and presented a structure drawing of HIL testing bench. Based on the basic principle and structure of HIL testing bench, a real testing bench including hardware, software, interface, and virtual controller on PCs etc., is manufactured. Through two kinds of experiments on wet and dry road, the results indicates that the hybrid brake system has a perfect performance, the HIL testing bench of hybrid brake system is very convenient to study and simulate the braking system. Because the simulation on PCs cannot solve lots of actual problems, with the HIL testing bench, more actual research project can be done in the future.

Abstract: This paper introduces the composition of double closed loop DC speed control system of DC motor speed and current, it is described the working principle of DC PWM converter and the calculating method of the pulse width modulation technology. Using the Matlab software to the induction motor system of modeling and simulation based on the technology of SPWM . Observed in the steady state and dynamic system using SPWM control mode and the influence of control parameters. Finally, experimental results show that the SPWM technology for effective control of double closed loop DC speed control system

Abstract: This paper presents a new method to solve the problem of speed and pressure constant value adjustment in the high-power hydraulic pumps and hydraulic motors performance test system which is based on energy recycling technology. The constant value control method is designed based on characteristic parameters of the process, including control resolution, overshoot and adjustment time. Experiments were implemented to verify the effectiveness of the proposed method. Experimental result shows that the proposed method reduced the test time by about 52.4% than before. The convergence rate of the constant value adjusting process and the test efficiency are significantly improved by the proposed method.