Applied Mechanics and Materials Vols. 130-134

Abstract: This paper introduced a general calibration principle based on Freescale MMA7455L acceleration sensor, and generated specific implementation method.

Abstract: In this paper, the intelligent vehicle control system’s design based on HCS12X MCU.The Multi-sensor combination technology be used in this control system. This system can control vehicle's position and Navigate the vehicle with GPS, vision sensor and laser radar sensor. This control system have an optimal decision in safety, reliability and handleability. The experiment showed that the smart vehicle can driving in the designed road by itself.

Abstract: This paper presents a built-in SEU sensor (BISS) to detect soft errors in CMOS digital systems. BISS detects SEU-induced soft errors by monitoring the meta-stability in the flip-flops. BISS includes positive pulse generator, footed dynamic inverter and keeper. SPICE simulations validate the approach. Experiments show minor overhead in terms of area. BISS can yield 80% error coverage at the cost of 22% area overhead. As its prominent advantage, insertion of BISS will incur minimal performance degradation.

Abstract: In this article, a new large range flexible jionts 6-UPUR six-axis force sensor is proposed, its structure model, measuring principle and structure parameters are given, and error factors are analyzed. The influences of system noise, calibration matrix errors, processing and installation errors, structural deformation on the platform, hydraulic loading system and data acquisition system errors are dicussed and related improvement measures are suggested.

Abstract: Micromachined modal gyroscope based on elastic body (MMGEB) is a novel kind of rotating rate sensor, which has large stiffness and robust resistance to shake and strike because there is no evident mass-spring component in its structure. In this paper, the model and working mechanism of MMGEB are proposed first. The modal analysis, the harmonic analysis and Coriolis analysis for the model by the finite element method (FEM) have been conducted. The research in the paper provides theoretical foundation for realizing this micromachined gyroscope.

Abstract: With the development of integrated automation systems and distribution automation technology, considering the safety of grid equipment, the voltage security of low-voltage power grid, personal safety and the characteristics of small current grounding system , this paper points out that still follow the old rules that run 0.5-2 hours allowed in dealing with ground fault of small current grounding system is unreasonable, elaborates the new philosophy that the protection function of small current grounding should be distributed to the feeder protection device and implemented tripping. Theoretical analysis shows that the scheme is accurate, reliable, and highly practical.

Abstract: A new sensor of the electromagnetic flowmeter in partially filled pipes (EMF-PF) is presented. With an array of parallel electrodes constituted by multi-electrodes in parallel connection as the measurement electrodes, the measurement electrodes alternate duties, sensing both the flow velocity and fill height signals. On the sensor pipe bottom, one pair of the electrodes is set as the signal injection electrodes that inject the AC signal used to determine liquid fill height. The theoretical analysis and experiment results indicate it feasible for the EMF-PF to employ this fill height measuring technique .

Abstract: This paper presents a parallelizable adaptive method to estimate and update close-loop digital predistorter for RF power amplifiers. The proposed scheme can be realized with multiple processors which can save computational time and be used in real-time implementation. By using a three-carrier wideband code-division multiple access (WCDMA) signal, the scheme is tested in the way of 3 branches in Nios II. Results show that the performance is approximate to that based on RLS algorithm and the time the scheme expensed is much less than that RLS needed.

Abstract: Inverted pendulum system is a complex, multivariable, nonlinear, strong-coupling, unstable system of high order. Compared with the straight-line inverted pendulum, rotary inverted pendulum is more complicated and unstable. In this paper, the mathematic model of a rotary inverted pendulum system is analyzed and deduced detailedly by applying the Lagrange method; the control properties and characteristics of generalized predictive control are researched with matlab simulation. Finally, the results of the experiment prove the system controlled by GPC has a better stability and quickness.

Abstract: Aimed at the influence of grid power quality suffered from the wind turbine, a new control strategy for grid-side inverter of direct drive wind power is proposed, that is voltage loop is controlled by ADRC and current loop is controlled by PI controller. The simulation results show that the system with new control strategy has stronger robustness, better steady state and dynamic characteristics, compared with the traditional control strategy that is voltage and current loops are both controlled by PI controller. Obviously, grid-connected power quality has been improved.