High‐Accuracy, High‐Reliability MEMS Accelerometer

2007 ◽  
pp. 225-237
Author(s):  
Noriyuki Yasuike
Keyword(s):  
High Reliability ◽  
High Accuracy ◽  
Mems Accelerometer

scholarly journals Code Calibration of the Eurocodes

2021 ◽  
Vol 11 (12) ◽  
pp. 5474
Author(s):  
Tuomo Poutanen
Keyword(s):  
High Reliability ◽  
High Accuracy ◽  
Variable Load ◽  
Reliability Model ◽  
Safety Factors ◽  
Rounding Errors ◽  
Code Calibration ◽  
Load Factors ◽  
Characteristic Values

This article addresses the process to optimally select safety factors and characteristic values for the Eurocodes. Five amendments to the present codes are proposed: (1) The load factors are fixed, γG = γQ, by making the characteristic load of the variable load changeable, it simplifies the codes and lessens the calculation work. (2) Currently, the characteristic load of the variable load is the same for all variable loads. It creates excess safety and material waste for the variable loads with low variation. This deficiency can be avoided by applying the same amendment as above. (3) Various materials fit with different accuracy in the reliability model. This article explains two options to reduce this difficulty. (4) A method to avoid rounding errors in the safety factors is explained. (5) The current safety factors are usually set by minimizing the reliability indexes regarding the target when the obtained codes include considerable safe and unsafe design cases with the variability ratio (high reliability/low) of about 1.4. The proposed three code models match the target β50 = 3.2 with high accuracy, no unsafe design cases and insignificant safe design cases with the variability ratio 1.07, 1.03 and 1.04.

The Remote Monitoring System of Highway Slope Safety

2014 ◽  
Vol 687-691 ◽  
pp. 747-750
Author(s):  
Cheng Hao Han ◽  
Jun Ping Zhu ◽  
Hao Li ◽  
Xing Tong Wang
Keyword(s):  
Real Time ◽  
Monitoring System ◽  
Remote Monitoring ◽  
High Reliability ◽  
Field Work ◽  
High Accuracy ◽  
Real Time Monitoring ◽  
Remote Monitoring System ◽  
Anchor System ◽  
Slope Condition

As it is impossible to conduct real-time monitoring on slope condition of highways, a remote monitoring system has been specially designed. Making use of GPRS technology, Labview and solar power, the system has realized nobody monitor on slope anchor system, automatic collection of slope pressure and displacement data. It enjoys advantages such as high-accuracy, real-time monitoring and high-reliability. Among existing effective monitoring ways, massive man-power is needed for on-field work, but real-time monitoring is still left to be achieved.

Comparative Research on Attitude Algorithm of the Multi-Rotor UAV Based on the Gyroscope

2014 ◽  
Vol 651-653 ◽  
pp. 668-671
Author(s):  
Xin Zhang ◽  
Lan Yu
Keyword(s):  
Comparative Research ◽  
High Reliability ◽  
Euler Angle ◽  
High Accuracy ◽  
Mems Gyroscope ◽  
Autonomous Flight ◽  
Attitude Angle ◽  
The Stability ◽  
Mean Square Errors ◽  
Angle Calculation

Obtaining the flight attitude of high accuracy, high reliability is a prerequisite for achieving the autonomous flight of the multi-rotor UAV. MEMS gyroscope can solve attitude angle individually. The paper adopts Euler angle and quaternion algorithms respectively to calculate attitude angle of the multi-rotor UAV. The flight experiment shows that the quaternion algorithm can guarantee the accuracy and the stability of the attitude angle calculation. The root-mean-square errors of the pinch roll and heading angles which are calculated by the quaternion algorithm are 2.947o, 3.606o and 9.769o, which can meet the demand for the autonomous flight of the multi-rotor UAV.

scholarly journals Multieffect Coupled Nanogenerators

Research ◽  
2020 ◽  
Vol 2020 ◽  
pp. 1-24
Author(s):  
Yun Ji ◽  
Yuan Liu ◽  
Ya Yang
Keyword(s):  
Electronic Device ◽  
High Reliability ◽  
High Accuracy ◽  
Charge Carriers ◽  
Energy Harvesters ◽  
Available Energy ◽  
Potential Applications ◽  
Self Powered ◽  
Output Characteristics ◽  
Device Interaction

With the advent of diverse electronics, the available energy may be light, thermal, and mechanical energies. Multieffect coupled nanogenerators (NGs) exhibit strong ability to harvest ambient energy by integrating various effects comprising piezoelectricity, pyroelectricity, thermoelectricity, optoelectricity, and triboelectricity into a standalone device. Interaction of multitype effects can promote energy harvesting and conversion by modulating charge carriers’ behaviour. Multieffect coupled NGs stand for a vital group of energy harvesters, supporting the advances of an electronic device and promoting the resolution of energy crisis. The matchless versatility and high reliability of multieffect coupled NGs make them main candidates for integration in complicated arrays of the electronic device. Multieffect coupled NGs can also be employed as a variety of self-powered sensors due to their rapid response, high accuracy, and high responsivity. This article reviews the latest achievements of multieffect coupled NGs. Fundamentals mainly including basic theory and materials of interest are covered. Advanced device design and output characteristics are introduced. Potential applications are described, and future development is discussed.

scholarly journals DEVELOPMENT OF A TECHNICAL SOLUTION OF THE KNOTTING ROOT SCRIPALS OF A SWITCHING TRANSMISSION

2019 ◽  
pp. 87-96
Author(s):  
V. S. SYDORENKO ◽  
YE. M. FEDORENKO ◽  
O. V. HUBAR ◽  
M. A. ARBUZOV ◽  
V. S. ANDRIEIEV
Keyword(s):  
High Reliability ◽  
High Accuracy ◽  
Climatic Conditions ◽  
Operating Conditions ◽  
Technical Solution ◽  
Lateral Direction ◽  
Straight Line ◽  
Current Content ◽  
Improved Design ◽  
Technical Solutions

Purpose. The article proposes a technical solution to the design of the root-fastening assembly of turnouts, which corresponds to the operating conditions of the railways. Methodology. To achieve the stated goal, the authors analyzed the existing designs of root binding of turnouts and formulated proposals that should be used when developing new technical solutions for root binding. The designs of root bonds should provide simplicity of construction, have a few number of parts, be repairable; allow to use of special devices for the mechanization of installation and dismantling works, have a few cost, provide high reliability. It must also to provide high accuracy along the width of the path. Structures should be able to control the width of the path to the standard indicators in the lateral direction, and if necessary (in a straight line). The designs of root bonds should be adapted for all climatic conditions of Ukraine. Findings. Proposals have been used in the development and improvement of technical solutions for root bonding. A root binding was developed which was called the root binding of the insert-nodule type P and an improved root binding was developed, the improved design was called the root binding of the insert-nodular type SD. The developed technical solutions for the design of root bonds meet the requirements, and with the current content of the switch, they solve the problem of the need to adjust the width of the path in the knit root node. Originality. It has been established that the technical solution of root fastening of the insert-overlay type of CD has advantages over the technical solution of root fastening of the insert-overlay type P since it has the ability to move the root of the wit by changing the position of the regulating element to the field side, thereby facilitating the current maintenance of the path. Practical value. Proposals were developed for regulating the width of the path using the regulating element of the root fastening of the liner-overlay type of CD, the proposals took into account the requirements for different operating conditions, namely for the main, receiving and other routes taking into account the corresponding tolerances for them, the corresponding schemes of the control plates are given.

Multifunction Synchro-to-Digital Conversion on Software Design

2011 ◽  
Vol 225-226 ◽  
pp. 589-592
Author(s):  
Yan Liu ◽  
Ze Gang Ye
Keyword(s):  
Software Design ◽  
High Speed ◽  
Measurement Accuracy ◽  
High Reliability ◽  
Low Cost ◽  
High Accuracy ◽  
Industrial Applications ◽  
Digital Conversion ◽  
The Cost ◽  
The Military

The current Synchro-to-Digital conversion (S/DC)with high reliability, high accuracy and widely used in the military field, but it has high cost and low tracking speed, not suitable for high speed and low-cost industrial applications. In this work, the principle of synchro and the harmonics of the synchro output signals are investigated. Multifunction S/DC software design using FFT algorithm and IIR digital filter technology is proposed. It Integrated many functions, such as angle position, harmonics analysis and filter, it also improved measurement accuracy and speed, reduced the cost. The simulation results by Matlab show that the method is feasible.

The Design of Infusion Monitoring System Based on STM32 Microcontroller

2013 ◽  
Vol 756-759 ◽  
pp. 395-398
Author(s):  
Zhi Hui Xu ◽  
Wei Zhong Li ◽  
Yong Jun Xiao
Keyword(s):  
Monitoring System ◽  
High Reliability ◽  
High Accuracy ◽  
Manual Adjustment ◽  
Infusion Speed

conventional manual adjustment to control the drop speed in clinical infusion has more unadvantageous and cannot realize automatic controlling and monitoring of the infusion speed. According to this condition, the infusion monitoring system is designed based on the STM32 microcontroller and one pair of infrared emitting and receiving diode, and the experimental is done. The result shows that this designed monitoring system can reach high accuracy, high reliability and low adjust time.

Research on Speed Changing Curve of Servo Turret Motor

2012 ◽  
Vol 198-199 ◽  
pp. 137-140
Author(s):  
Yu Sheng Wang ◽  
Ming Ming Wang ◽  
Xiang Jun Zhu
Keyword(s):  
Mechanical System ◽  
High Reliability ◽  
High Accuracy ◽  
Servo Motor ◽  
Motor Speed ◽  
Mechanical Structure ◽  
Fast Speed ◽  
Acceleration And Deceleration ◽  
Critical Problems ◽  
The Impact

Because of such merits of servo turret like fast speed of tool changing, high accuracy of first location, simple mechanical structure, high reliability and so on, servo turrets are widely used in turning processing and turning and milling complex processing center.Control mode of servo motor speed is one of the critical problems in the designing of servo turret.S curve acceleration and deceleration control is to make the derivative of acceleration as constant in this procession, and maximize to reduce the impact of mechanical system by controlling acceleration derivative. Otherwise, by setting parameter or programming acceleration and its derivative, flexible acceleration and deceleration will be controlled to fit for different kinds of situation of machines.

scholarly journals Automatic support control of an upper body exoskeleton — Method and validation using the Stuttgart Exo-Jacket

2020 ◽  
Vol 1 ◽  
Author(s):  
Raphael Singer ◽  
Christophe Maufroy ◽  
Urs Schneider
Keyword(s):  
Upper Limb ◽  
Cost Efficiency ◽  
Muscle Activation ◽  
High Reliability ◽  
Initial Step ◽  
High Accuracy ◽  
Industrial Applications ◽  
Upper Body ◽  
Upper Limbs ◽  
Control Approach

Abstract Although passive occupational exoskeletons alleviate worker physical stresses in demanding postures (e.g., overhead work), they are unsuitable in many other applications because of their lack of flexibility. Active exoskeletons that are able to dynamically adjust the delivered support are required. However, the automatic control of support provided by the exoskeleton is still a largely unsolved challenge in many applications, especially for upper limb occupational exoskeletons, where no practical and reliable approach exists. For this type of exoskeletons, a novel support control approach for lifting and carrying activities is presented here. As an initial step towards a full-fledged automatic support control (ASC), the present article focusses on the functionality of estimating the onset of user’s demand for support. In this way, intuitive behavior should be made possible. The combination of movement and muscle activation signals of the upper limbs is expected to enable high reliability, cost efficiency, and compatibility for use in industrial applications. The functionality consists of two parts: a preprocessing—the motion interpretation—and the support detection itself. Both parts were trained with different subjects, who had to move objects. The functionality was validated both in the cases of (A) an unknown subject performing known tasks and (B) a known subject performing unknown tasks. The functionality showed sound results as it achieved a high accuracy ( $$ 95\% $$ ) in training. In addition, the first validation results showed that this functionality is useful for integration in an appropriately adapted ASC and can then enable comfortable working.

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