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研究微机械陀螺仪的零位误差对提高惯性导航精度具有重要意义。论文采用Allan方差分析法对MEMS陀螺仪的零位误差做了综合评定，提出了一种动态的零值偏移误差补偿算法来滤除陀螺仪的零值偏移误差；论文还对启发式漂移消减法（HDR，heuristic drift reduction）做了改进，有效的提高了原算法的补偿精度。最后，再次采用Allan方差分析法对补偿后的零位误差进行评定，并以Voyager-I...
Structural Surface Crack Monitoring Method Based on Electrical Potential Technique and Modern Surface Technology
crack monitoring electrical potential technique surface technology
2011/8/4
Crack monitoring plays a great role in modern structural health monitoring, however, most of the conventional crack inspections have disadvantages in terms of the accuracy, expense, reliability, durab...
Control System Design for an Unmanned Helicopter to Track a Ground Target
unmanned helicopter trajectory plan target tracking
2011/8/4
Due to potential wide applications, the problem of utilizing an unmanned helicopter to track a ground target has become one of the most active research directions in related areas. However, in most ca...
Structural Damage Detection Method Based on Decomposition of the Operating Deflection Shapes
damage detection decomposition operating deflection shape (ODS)
2011/8/4
Full-field measurement techniques such as the scanning laser Doppler vibrometer (LDV) and the electronic speckle pattern interferometry systems can provide a dense and accurate vibration measurement o...
基于不确定能力参数的制造资源区间优化检索方法
制造资源 区间转化 信息模型 优化检索
2012/3/2
针对网络环境中制造资源和任务信息的不确定性,构建了资源和任务的信息模型,并对其能力参数进行了形式化描述。针对不确定性能力参数,探讨了制造资源参数区间的转化规则。利用区间距离的概念,提出一种在网络环境中进行制造资源优化检索的新方法,并通过实例验证了该方法的有效性。
Ultrasonic Nondestructive Signals Processing Based on Matching Pursuit with Gabor Dictionary
ultrasonic signal processing sparse representation matching pursuit
2011/8/4
The success of ultrasonic nondestructive testing technology depends not only on the generation and measurement of the desired waveform, but also on the signal processing of the measured waves.
Flow Field Characteristics for Parachute-projectile System
parachute projectile flow field computational fluid dynamics (CFD)
2011/8/4
In the current research for parachute flow field nowadays, the size of parachutes in previous research are so large compared with their carriers that the effects of the carriers wake flow to parachute...
针对机械式按摩椅缓解肌肉疲劳的绩效,提出了基于表面肌电（sEMG）信号的人机评价模型。实验要求两名被试者在执行静力性标准俯卧撑（SPU）动作之间,分别采用静坐与按摩两种方式恢复肌肉疲劳,并在SPU过程中采集竖脊肌的sEMG信号。根据模型的评价指标对实验数据进行了比较与分析,结果表明,SPU后采用拍打按摩恢复对竖脊肌疲劳缓解的效果好于静坐恢复的效果,从而验证了模型在按摩椅人机评价上的可行性。
带长管道的阀控马达无磁转台控制策略研究
无磁转台 长管道 控制策略 速率精度
2012/3/2
针对带长管道的阀控马达系统用常规PID策略控制效果不理想的缺点,提出了一种新的PIDD控制策略对系统进行控制。以考虑管道效应的系统数学模型为基础,引入对凸轮转子叶片马达所受扰动力矩的分析,并结合时滞系统的特点,导出了PIDD控制策略。实验和仿真结果基本一致,表明该控制策略能显著提高系统的速率精度并有效地减少抖动,达到很好的控制效果。
Receptance Coupling for Tool Point Dynamics Prediction on Machine Tools
receptance coupling dynamics endmill chatter
2011/8/4
Chatter has been a primary obstacle to the successful implementation of high speed machining. The frequency response function(FRF) of the tool point is crucial for identification of chatter free cutti...
Accelerated Degradation Reliability Modeling and Test Data Statistical Analysis of Aerospace Electrical Connector
electrical connector performance degradation reliability
2011/8/4
As few or no failures occur during accelerated life test, it is difficult to assess reliability for long-life products with traditional life tests. Reliability assessment using degradation data of pro...
-D Free-form Shape Measuring System Using Unconstrained Range Sensor
shape measurement multiple view registration
2011/8/4
Three-dimensional (3-D) free-form shape measurement, a challenging task pursued by computer vision, is mainly characterized with single view acquisition and multiple view registration. In conventional...
A Solution Domain Boundary Analysis Method and Its Application in Parameter Spaces of Nonlinear Gear System
control parameter space solution domain boundary analysis
2011/8/4
Mastering the influence laws of parameters on the solution structure of nonlinear systems is the basis of carrying out vibration isolation and control. Many researches on solution structure and bifurc...
Design and Dynamics Analysis of Anti-skid Braking System for Aircraft with Four-wheel Bogie Landing Gears
anti-skid braking system four-wheel bogie landing gear
2011/8/4
In asymmetric conditions, the movement and loads of left/right wheels or front/back wheels of the aircraft with multi-wheel or four-wheel bogie landing gears are inconsistent. There are few open liter...