Applied Mechanics and Materials Vols. 602-605

Abstract: Most parking guidance system is not perfect, in an unknown and complex parking lot, the most urgent problem to the driver is how to find a parking space and find his car from the parking space quickly. In order to solve this problem, in virtue of the improved layered A* algorithm, system fast calculates the optimal path information which is from the entrance to each parking space and from each parking space to the export. Compared with using A* algorithm directly, the calculation time is shorten, the number of traversal nodes is reduced. At the same time, it adopts the integration design idea in the design of hardware and software, and uses international popular CAN to complete the design of network nodes in the parking guidance system, in which the monitoring interface is designed, the parking space information and gateway vehicle information are collected, the optimal path information are displayed. As integration design method was adopted, the design contents are simplified, the development hours are shortened, and the CAN intelligent nodes have a good extendibility and portability. This is the foundation for the expansion of parking lot In the future.

Abstract: . MEMS device based on MEMS technology has the advantages of small volume, light weight, low cost, shock resistance, high reliability, it is widely used in the dynamic level measuring device. But due to the interference of external environment, the measurement accuracy of MEMS devices has been difficult to achieve practical application level. This paper analyzes the factors influencing the measurement accuracy of MEMS devices in the dynamic level measurement, is proposed based on the improved MEMS gyro random error compensation algorithm for ARMA model. Processed by the random error of a certain type of gyro, the test, the measuring accuracy of MEMS gyroscope has been significantly improved in the before and after filtering. After Kalman the improved filter and Kalman filter adaptive fading factor is introduced, in the static condition, the standard error of the difference of the original error are reduced to 3.75% and 4.8%, the filtering precision and dynamic environment is also effectively improved. Prove that the method is feasible and effective and is of great practical significance.

Abstract: Intellectual life has become a part of modern life. Watching television is now a major part of peoples’ leisure time. Previous literatures stated that television viewing would cause personal happiness and good feelings. How humans select their preferred TV channels and enjoy their leisure time is important for them in order to relax themselves. Previous literatures focused on their TV viewing records; however, it is not always pertinent for observing people's habits. A wrinkled brow is able to let the TV know the meaning behind changing channels. It should be based on face recognition and sensors. This research tries to improve the functions of the TV controller, making for an easier life and pursuit of more intelligent viewing. A new innovation finding was to propose, and also model it as mathematics formulas for future studies. Although it is still in mathematic form, perhaps, it would enter mass production someday. Future research also suggests studying multi person feelings, intelligent sensor and control.

Abstract: Ladle operation for steel plant directly affects the production operation to the site, through artificial means of a track record of special steel ladle operation process analysis, on this basis, considering the "product structure" on the operation of the ladle on the rational calculation of the number of ladle has been improved. Match for different machine in case of furnace ladle operation, classification discussed the number of its ladle operation control strategy.

Abstract: The serial-parallel robot can be resolved into the serial combination of two parallel robots. Each branch chain of the parallel robot is all a serial branch chain. By utilizing the kinematics equivalency and considering the influences on posture errors of the final moving platform affected by end errors of each branch, the synthetic analytical method based on dynamic and static factors was put forward. The main affection factor was presented and effectiveness verification has been carried out on the conclusion of study by the form of a living example.

Abstract: Design the redundant driving structure based on a new type of universal Cartesian serial-parallel manipulator, structural parameters are optimized through objective function, relative workspace and accuracy of motion included as the main index, four BP neural networks are constructed with reiterative exercise carried out, transferred function and input parameters through the constructed and exercised neural networks, analysis and approach computation completed with pretty optimal data suggested.

Abstract: A control platform was constructed with the features of a car carrier and two step motors, which could be controlled by changing the motors’ speed and direction based on DSP. Two motors were directly connected with the front wheels (they are both the driving wheels and steering wheels) to realize a straight line or curve driving. The hardware circuit of the experimental platform control part was designed to solve the relative connection problems, including among the development board, step motor controller, step motor; among the computer, the emulator, the development board. The control strategy of the step motor was studied based on DSP. To verify the trajectory tracking control function of the experimental platform, a circular trajectory was verified with the tracking control strategy.

Abstract: To address the problem of planning complete coverage paths for mowing robots that have the greatest coverage rates and the lowest repetitive rates, we proposed an improved back propagation neural network algorithm based on priority traversal thoughts for local path planning. The algorithm based on plowing global path planning. We adopted grid method to model the environment and used Matlab2010a to simulate for the algorithm. Simulation results show that the proposed algorithm can make the mowing robot walk out of dead zone, the dead zone was composed of obstacle grid or the grid that had been cut around this area, and achieve the complete coverage path planning.

Abstract: A time-delay discrete-time fuzzy singularly perturbed modeling and fuzzy state feedback control approach are presented for a class of complex flexible nonlinear systems with time-delay. The considered flexible nonlinear system is firstly described by a time-delay standard discrete-time fuzzy singular perturbation model. A fuzzy state feedback control law is secondly design. By using a matrix spectral norm and linear matrix inequalities approach, the sufficient conditions of the controller existence are divided. The provided controller not only can stabilize the resulting closed-loop system but also overcome the effects caused by both time-delay and external disturbances. A simulation example is given to illustrate the effectiveness of the developed result.

Abstract: The bilateral PD control method for teleoperation robot has some defects, such as poor tracking performance and force feedback performance. This paper, based on traditional bilateral PD control method, adds an impedance controller to the master and the slave, and deduces the stability condition according to the absolute stability criterion. The simulation shows that this method can assure the system stability and improve tracking performance and force feedback performance.