scholarly journals Design and simulation of frequency divider circuit based on multisim

2021 ◽  
Vol 268 ◽  
pp. 01058
Author(s):  
Ling Li ◽  
Lingguo Meng ◽  
Fuxun Wang
Keyword(s):  
Circuit Design ◽  
Frequency Divider ◽  
Frequency Signal ◽  
High Frequency Signal ◽  
Improve Design ◽  
Experimental Teaching ◽  
Reduce Development Time ◽  
Design Systems ◽  
Scale Integration ◽  
Circuit Function

Frequency divider circuit is the basic circuit in digital logic circuit. The circuit function is to divide or drop the frequency of the high frequency signal to get the lower frequency signal for a given frequency signal by division. On the Multisim software platform, using different design methods, as the foundation of middle scale integration chip 74LS161, design even frequency divider, odd frequency divider circuit and (N- 0.5) frequency divider circuit respectively. Each circuit design principle and method is illustrated and simulated. The results showed that the design is correct and conform to the proposed requirement. Experimental teaching applications based on Multisim software can improve design efficiency and reduce development time of design systems.

Impedance Matching Using the Smith Chart

2014 ◽  
Vol 701-702 ◽  
pp. 1158-1161
Author(s):  
Jie Yu ◽  
Wen Dong
Keyword(s):  
Circuit Design ◽  
High Frequency ◽  
Signal Transmission ◽  
Impedance Matching ◽  
Basic Requirement ◽  
Frequency Signal ◽  
High Frequency Signal ◽  
Fast Calculation ◽  
Matching Structure ◽  
Smith Chart

Impedance matching is a basic requirement for high frequency signal transmission, but also a relatively complicated aspect in circuit design. In this article, from the perspective of impedance matching, structure principle and characteristics of Smith chart are introduced. On the basis of Smith chart software, its process of impedance matching is described with a simple example to show the advantages of convenient and fast calculation of Smith chart for impedance matching.

Dither in a rolling airframe flight vehicle with a two-position actuator: An amplitude distribution approach

2016 ◽  
Vol 39 (8) ◽  
pp. 1205-1215 ◽  
Author(s):  
Bahram Mohammadi ◽  
Mohammad Reza Arvan ◽  
Yousof Koohmaskan
Keyword(s):  
High Frequency ◽  
Degrees Of Freedom ◽  
Coupling Effect ◽  
Cross Coupling ◽  
Amplitude Distribution ◽  
Feedback System ◽  
Flight Vehicle ◽  
Frequency Signal ◽  
High Frequency Signal ◽  
Minimal Error

Rolling airframe manoeuvring is a type of manoeuvre in which the missile provides continuous roll during flight. Cross-coupling between the angle of attack and sideslip in rolling airframe missiles (RAMs) yields a coning motion around the flight path. As the pitch and yaw cross-coupling effect decreases, the radius of this coning motion decreases and the accuracy of the control system increases. Two-position (on–off) actuators are used in most RAMs. The presence of a two-position actuator in a feedback system makes its characteristics non-linear. A high-frequency signal so-called dither is applied to compensate for the non-linearity effect of the actuator characteristic in the feedback system and to stabilize the coning motion. The amplitude distribution function (ADF) method in dither analysis shows that the smoothed non-linearity characteristic can be computed as the convolution of the original non-linearity and the ADF of the dither signal. According to the four-degrees-of-freedom (4-DOF) equations of RAMs in a non-rolling frame and regarding various dither signals through the ADF approach on a two-position actuator, an analytical condition for dither amplitude in coning motion stability of RAMs is derived. It was shown that the triangular signal with specified amplitude and high enough frequency led to a smoother response of two-position actuators. Finally, by applying beam-riding guidance to a RAM, the performance of dithers for decreasing the distance of the missile from the centre of the beam is validated through simulations. It is illustrated that applying the triangular dither resulted in minimal error.

Extraction Feature of Spindle Unbalance of Machine Tool Based on the Wavelet Transform

2011 ◽  
Vol 279 ◽  
pp. 313-317
Author(s):  
Dong Ju Chen ◽  
Jin Wei Fan ◽  
Fei Hu Zhang
Keyword(s):  
Wavelet Transform ◽  
Spectral Density ◽  
Machine Tool ◽  
Power Spectral Density ◽  
Frequency Signal ◽  
High Frequency Signal ◽  
Power Spectral ◽  
Density Analysis ◽  
Power Spectral Density Analysis ◽  
Flatness Error

A new method for extracting spectrum feature of spindle unbalance of machine tool is proposed. The flatness error of workpiece surface includes much errors information, and the information contains high frequency signal and low frequency signal. For these errors information, a new identification method of turning errors of workpiece based on the wavelet transform and power spectral density analysis is proposed. According to the focal variation character of wavelet and the energy value of power spectral density analysis, the feature of spindle unbalance from the measured flatness error of workpiece is extracted and identified.

scholarly journals An Investigation into Error Source Identification of Machine Tools Based on Time-Frequency Feature Extraction

2016 ◽  
Vol 2016 ◽  
pp. 1-10 ◽  
Author(s):  
Dongju Chen ◽  
Shuai Zhou ◽  
Lihua Dong ◽  
Jinwei Fan
Keyword(s):  
Machine Tool ◽  
Frequency Domain ◽  
Surface Topography ◽  
High Frequency ◽  
Low Frequency ◽  
Frequency Signal ◽  
High Frequency Signal ◽  
Time Frequency ◽  
Cross Correlation Analysis ◽  
Correlation Analysis Method

This paper presents a new identification method to identify the main errors of the machine tool in time-frequency domain. The low- and high-frequency signals of the workpiece surface are decomposed based on the Daubechies wavelet transform. With power spectral density analysis, the main features of the high-frequency signal corresponding to the imbalance of the spindle system are extracted from the surface topography of the workpiece in the frequency domain. With the cross-correlation analysis method, the relationship between the guideway error of the machine tool and the low-frequency signal of the surface topography is calculated in the time domain.

Magnet Temperature Estimation in Surface PM Machines Using High-Frequency Signal Injection

2010 ◽  
Vol 46 (4) ◽  
pp. 1468-1475 ◽  
Author(s):  
David Díaz Reigosa ◽  
Fernando Briz ◽  
Pablo García ◽  
Juan Manuel Guerrero ◽  
Michael W Degner
Keyword(s):  
High Frequency ◽  
Frequency Signal ◽  
High Frequency Signal ◽  
Temperature Estimation ◽  
Signal Injection
Sign in / Sign up

Export Citation Format

Share Document