共查询到20条相似文献,搜索用时 109 毫秒
1.
2.
3.
针对干簧管液位传感器的诸多缺点,构思了一种利用开关式霍尔片作为传感元件的液位测量传感器;霍尔式液位传感器的测量原理、测量电路进行了介绍;传感器的分辨率进行了讨论,最后通过实验数据分析对传感器进行了可行性验证。 相似文献
4.
5.
提出了通过在装有一个磁化钢球的轴承外圈及保持架侧面配置霍尔传感器,测量钢球三维运动的新方法,阐述了该测试方法的基本原理;设计开发了相关的检测试验装置,并介绍了其基本原理和结构。 相似文献
6.
7.
设计了一种基于磁阻效应(AMR)和霍尔效应的角度传感器。论述了传感器的工作原理、电路组成及功能。传感器由磁阻芯片、霍尔芯片、放大以及滤波电路构成。通过旋转圆柱永磁体改变磁阻芯片、霍尔芯片周围磁场,引起传感器输出电压变化,进而测量旋转角度。在传感器结构设计中,对圆柱永磁体进行了磁场有限元分析,对角度传感器进行了试验标定与数据分析。测试结果表明:在0°~360°范围内,重复性误差为0.58%,迟滞误差为0.33%,综合误差为1.82%,达到了实际角度测量的要求。 相似文献
8.
9.
10.
刘公俊 《机械工业标准化与质量》2023,(8):50-52
为满足测试需要,设计一种基于霍尔角度传感器的非接触式角位移测量系统。给出了测量系统的硬件和软件总体设计,系统以MLX90316霍尔角度传感器为核心,对直接与操纵杆连接的旋转轴角位移进行实时测量。结果表明该方法成本低,易改装,分辨率高,误差小。 相似文献
11.
在考虑攻角、桨距角、偏航运动、重力和惯性力等因素的情况下,基于静力学分析方法,建立了桨叶轴承系统载荷分析数学模型。通过数值计算,研究了桨叶轴承在风速和桨距角、偏航角速度和桨叶转速同时发生变化的工况下所承受的载荷。分析结果表明,风速的增大会使载荷不断增加,而桨距角的增大只能使载荷在局部有所增大;桨叶轴承系统的陀螺力矩幅值大小、桨叶在空间的旋转角度以及偏航速度有着直接的关系。 相似文献
12.
13.
在考虑攻角、桨距角、偏航运动、重力和惯性力等因素的情况下,基于静力学分析方法,建立了桨叶轴承系统载荷分析数学模型。通过数值计算,研究了桨叶轴承在攻角、桨距角、偏航角速度及不同风速工况下所承受的载荷。分析结果表明,攻角增加会使不同方向上的载荷有不同程度的增加;桨距角增大到一定程度,载荷会呈现不同的趋势;偏航速度的变化导致陀螺力矩的变化,从而引起轴承载荷的变化。 相似文献
14.
Compensation of rotor imbalance for precision rotation of a planar magnetic bearing rotor 总被引:2,自引:0,他引:2
Magnetic bearings provide an alternative for achieving precision rotation. But the rotational accuracy is sensitive to rotor imbalance. The system we study is a planar rotor supported by aerostatic suspension and positioned by a radial magnetic bearing of nanometer precision. We present compensation designs and experiment results for precision rotation about the geometric center and the mass center, respectively. In the former case, the base harmonic component at each sensor output is removed by explicit trigonometric compensation signals that are constructed in real time. In the latter case, a new double-loop compensation design is given. Each compensation loop is similar to that in the former case. The compensation, aided by a variable rotational speed that is changed up and down repeatedly, is shown to push the rotational center to approach the mass center. Once the mass center is reached, the rotor remains to rotate about the mass center at variable rotational speed without transient. Compared with the existing methods, which find the mass center or inertial axis at a fixed rotational speed and rely on exact values of plant parameters, our method may locate the mass center more accurately. Experiment data indicate that the mass center is located with an error of tens of nanometers. 相似文献
15.
In order to reduce the complexity of machine construction and improve the mechanical efficiency, high speed rotation machineries usually implement self-acting gas bearings to substitute the traditional oil-lubricated bearings. This paper presents test results of a gas thrust bearing with viscoelastic support which is designed for high speed turbo-machinery. The gas bearing, which belongs to compliant foil bearings, consists of a top thin metal foil and a bottom thin rubber foil. Static and stability experiments are conducted on a high speed gas turbine test rig. The static results indicate that the structural stiffness of test bearing generally increases with the increase in axial load and the decrease in thickness of bottom foil. In the rotation tests, rotor runs stably with small vibration amplitude, which is dominant in waterfall plot during whole speed up procedure. It shows that test bearing has preferable stability characteristics for high speed gas turbines. 相似文献
16.
17.
18.
19.
利用现代计算机技术和传感器技术将ЦКБ—72轴承寿命试验机进行改造,以满足一般的轴承寿命试验及轴承特殊性能试验。改造后的试验机可自动检测并记录试验轴承的温度、载荷、转速等参数,实现试验机的智能化控制。 相似文献
20.
建立了五自由度磁悬浮轴承柔性转子试验系统,利用Matlab工具箱对比分析了不完全微分PID和模糊自调整PID控制策略对系统动态性能的影响,设计制作了基于TMS320F28335 DSP的数字控制器硬件电路,在模糊自调整PID控制策略的基础上引入转速量,在不同转速区段采用不同的模糊自调整因子,以满足转子在各转速区段对支承特性的不同要求,编写了相应的软件,完成了系统的高速旋转试验。仿真和试验结果均表明,采用基于转速的模糊自调整控制策略,可以改善磁悬浮轴承柔性转子系统的动态性能。 相似文献