Papers by Keyword: Angular Displacement

Abstract: In order to get rid of noise from the angular displacement of the crank rocker mechanism, the wavelet transform method is introduced. After the noise corresponds to the high frequency band of wavelet domain of the signal and the signal corresponds to the low frequency band of wavelet domain of the signal, the signal is decomposed into four layers, and the high frequency brand is set zero. The test results show that this method was most ideal for the de-noising effect on displacement signals, which is able to not only retain valid signals but to effectively remove the noise.

Abstract: A simple method for measuring and calculating the finger joint angular displacement was proposed to serve as the basis for designing dexterous hand and rehabilitation robot hand. The direct kinematics model and the inverse kinematics equation of the finger were established at the beginning of this paper. Then, the trajectory of the fingertip, from which the coordinates of the fingertip were extracted by using AutoCAD, was captured by camera. Finally, the trajectory coordinates of the fingertip were substituted into the inverse kinematics equations to solve the angular displacements of the proximal interphalangeal (PIP), distal interphalangeal (DIP) and metacarpophalangeal (MCP) joints. The calculating precision testing of the finger joint angular displacement needs to substitute the angular displacements calculated before into the direct kinematics equations of the finger to calculate the trajectory of the fingertip. Then, the average Euclidean distance between the calculated trajectory and the real trajectory was computed to test the calculating precision of the finger joint angular displacement. The average Euclidean distance of each fingers is less than 0.05mm, which proves the high calculating precision of the finger joint angular displacement and the efficiency of the method presented in this paper.

Abstract: Linear and angular displacement is an important criteria for incompressible materials. Natural rubber is a one of the incompressible material because it has a potential to make uniform displacement when apply the quantum of force. This paper represents the linear and angular displacement of natural rubber engine isolator, respectively. The identity formulation is developed and trivial solution is faced. To doing so, the identity formulation is derived and finally the equation of relationship between linear and angular displacement is derived. Finally, the result has shown the transformation of these two displacements with quantum of frequency.

Abstract: The design of the angular displacement sensor based on magnetoresistive technology uses DSPIC30F3010 digital signal processor for computing. Having been amplified, magnetoresistive element output signal enters into the single-chip microprocessor A/D converter unit to operate together with the Hall components output signal operation processing, and ultimately generates the actual angular displacement values.

Abstract: Modulation transfer function resulting from random vibration was analyzed. To conclude that the effect of angular displacement was the major factor. Allowable MTF degradation was represented, and convert allowable MTF degradation into stable system design parameters, which can guide perfect design for stabilization system. Based on the spatial mechanism and translational principle of parallelogram, an irrotational displacement isolator was developed. It can meet the requirements of irrotational displacement and damp. An instance was given; and 34dB reduction was achieved at frequency of 100HZ. With the help of MSC.ADAMS simulation software, simulated curve proves correct for isolator, and the irrotational displacement mechanism was tested by optical method, coupled angle is less than 8″, it can satisfy the demand of aerial imaging.

Abstract: To solve the critical problem of large gear deviation on-machine: angle displacement measurement that is how to get signal acquisition and accuracy analysis of angle displacement. A new measuring method is proposed, which applies the dividing mechanism (it is composed of friction disc and circular grating) to ensure index and pick up signal of gear corner correctly and strictly according to the principle of angular displacement measurement. Furthermore, the main error which affects measurement accuracy is analyzed, and accuracy is analyzed with geometrical theory such as Fourier series and error synthesis principle etc. The experimental results indicate that angel dividing and signal samplings are easier and more efficient by the dividing mechanism, furthermore, the accuracy is in the range of total error that is permitted by verification, and the mechanism can also meet the requirement of high accuracy, so the method is significance that assessing transmission accuracy of involutes gear.

Abstract: This paper introduces a kind of measurement method of the height of liquid level by the tracking the use of angular displacement, aiming at the difficulties and problems of non-contact measurement for the height of liquid level in ultrasonic. Under the principle of the simultaneous tracking and laser light reflection, it realize the corresponding relationship between the liquid displacement and the light imaging based on the triangulation method. Thus to obtain the actual data of the height of liquid level. That to offer another new option for non-contact measurement.