Applied Mechanics and Materials Vols. 635-637

Abstract: It is designed a Fast Tool Servo (FTS) device which based on piezoelectric ceramic and jointed by flexible hinge. The flexible hinge has been analyzed and optimized both by the theoretical calculation and finite element analysis; and it has been physically manufactured and tested by means of pressure sensor and laser interferometer. The stiffness model was established. The driving voltage and displacement relationship has been revealed. The results indicate that this FTS system can reach a travel range for 60μm,the frequency response precedes 150Hz within 39μm travel range.

Abstract: Through the experimental design of heating temperature automatic control device, the device is mainly composed of two parts: one is the time - temperature intelligent control instrument, two is the control of water circulation and the disconnection of the electromagnetic valve. The device can be based on user needs, set heating time for opening and closing as well as to maintain the temperature range, automatically adjust the heating temperature in the room. Based on the design of automatic control device of heating temperature, can effectively control the production workshop and office space temperature, is conducive to the protection of the product quality; also can be used for the enterprise, family and other heating control, for the user save a lot of heating fund.

Abstract: The goal of the present contribution is to propose a new control strategy of drive train for the improvement of efficiency of regenerative braking system. In this new control strategy, the backward numerical solution is utilized to realize the cooperative operation of the electric machine and CVT. The analysis for the proposed control strategy is fulfilled based on the vehicle model. The results show that, compared to the existing one without considering the affect of CVT’s efficiency, the proposed control strategy could make more kinetic energies in the vehicle be recaptured.

Abstract: The H∞ control issue of a class of uncertain T-S fuzzy system is studied in this paper. The items of uncertainties and external interference are introduced into the T-S fuzzy system so that the fuzzy model can be close to the actual model more accurately. The output feedback switching controller is designed by the switching technique and the method of PDC , and design the switching law so that the sufficient conditions which make the closed-loop system asymptotically stable are obtained. The results of MATLAB/SIMULINK simulation have shown the good feasibility and effectiveness of the designing method.

Abstract: The kinematics equation of the handling robot with six free degrees has multiple sets inverse solution, and the robot system only can choose one optimized solutions to drive the robot to work. The kinematics model of the robot is established by D-H method, and the inverse solution is derived by an algebraic method. The best flexibility principle was introduced to determine a set of optimal solutions from 8 sets of feasible solutions. The correctness of robot inverse solution method is verified through a set of calculation examples.

Abstract: The system of Micro Flapping-wing Rotor to achieve the flapping and rotation motions is first introduced briefly. Then the system dynamic model which includes the flapping rotary flight aerodynamics at a low Reynolds number regime, the body dynamics, the electromagnetic actuator and the control surface is described. This model and system simulation in the preliminary design phase may provide the opportunity for designers to make fundamental design decisions early to improve the flight performance. Also, the simulator is used to study open loop flight dynamics and test a periodic proportional output feedback control law. Simulation testing shows that the control system has a good flight performance for this flapping wing rotor.

Abstract: Grinding process is a critical procedure of mineral process, and its running character is extremely important for the productivity and quality improvement. It is of comprehensive and complicated characteristics of nonlinearity, large time-delay, slow time-varying and so many key engineering parameters which can not be detected online. It is dramatically significant and difficult to study the control algorithms, the optimization algorithms and the soft censor techniques for grinding process. In order to decrease the cost and risk of practical debugging, how to establish a control simulation system of grinding process for engineering is an issue which has greatly practical value. The simulation experiment platform for grinding process control is designed and developed. The general structure of the platform including real control system and virtual production plant is proposed. Thus, a kind of engineering experiment environment is provided for control and optimization algorithms.

Abstract: In low frequencies, based on the linear model of giant magnetostrictive actuator, the PID controller is designed. According to the situation of fixed parameter controller with weak adaptive capacity, an intelligent algorithm - Invasive Weed Optimization (IWO) with competition mechanism is introduced to optimize the PID controller parameters. Invasive Weeds Optimization can elect adaptable seeds as optimal parameters through reproduction, spatial distribution and survival of the fittest. It has strong global and local search capability, which can effectively improve the control robustness and position tracking accuracy. Simulation results show that: for the step signal, compared with the traditional PID control, weed control PID control has the characteristics of high precision, good tracking performance and strong noise suppression capability.

Abstract: Select to herein as interference observation MPPT control method according to the principle of interference with observation of the Matlab simulation model, the simulation results by the MPPT algorithm is not added with the results were compared and found MPPT algorithm can improve the the output power of the photovoltaic cell. Through experimental platform to build, complete with MPPT way battery charging, and the experimental results and the data used to prove the correctness of the algorithm.

Abstract: This paper investigates the problems of tracking control for switched fuzzy systems. Based on the state-dependent switching method, sufficient conditions for the solvability of the tracking control problem are given. We use single Lyapunov function technique to design a tracking control law. The controller design problem can be solved efficiently. A numerical example is given to show the effectiveness of our method.