-
Case Analysis and Balance Principle of Virtual Axis Rotation
Issue:
Volume 1, Issue 1, March 2019
Pages:
1-5
Received:
12 November 2018
Accepted:
28 December 2018
Published:
1 February 2019
Abstract: In this paper, the concept of rigid-axis fixed-axis rotation is proposed, and the equilibrium law that the rigid body follows during the rotation of the virtual axis is given from the perspective of moment balance, that is, the principle of rigid-axis fixed-axis rotation balance. Further, this balance principle is used to analyze two typical examples: the stability of the vehicle the bicycle. The constraint relationship of stable rotation in these two examples is shown respectively. The minimum angular velocity expression and maximum angular velocity expression for maintaining stable rotation of the flying wall and the stability of the bicycle are derived.
Abstract: In this paper, the concept of rigid-axis fixed-axis rotation is proposed, and the equilibrium law that the rigid body follows during the rotation of the virtual axis is given from the perspective of moment balance, that is, the principle of rigid-axis fixed-axis rotation balance. Further, this balance principle is used to analyze two typical exampl...
Show More
-
Using the Principle of Sound Grid to Reveal the Phenomenon of Multi-Level Ladder
Issue:
Volume 1, Issue 1, March 2019
Pages:
6-12
Received:
31 December 2018
Accepted:
29 January 2019
Published:
28 March 2019
Abstract: Abstract: The light intensity distribution formed by light waves through gratings is actually the result of single slit (groove) diffraction and multi-slot (groove) interference of grating. It has been observed that after a step with enough stages reflects the incident noise of a certain intensity, the tone of a certain frequency band will be obtained in the reflected sound field. In this paper, the glare grating is regarded as a plane reflection acoustic grating, that is, the blazed sound grid, which gives the distribution of the sound intensity of the blazed sound grid, and also gives the constraint relationship that the corresponding path difference of the reflected sound waves between adjacent grooves is satisfied. At the same time, according to the field survey data and the corresponding spectral curve combined with the principle of plane reflection acoustic grating, the music phenomenon formed in the multi-stage step reflection sound field is analyzed, and the firecrackers under the monument of the Susan Anti-Japanese War Memorial in Maoshan, Jiangsu, China The two phenomena of the "Put the firecrackers in the air under the monument" and "Recruiting crane" in Heshan, Qingdao, Shandong, China are explained as examples.
Abstract: Abstract: The light intensity distribution formed by light waves through gratings is actually the result of single slit (groove) diffraction and multi-slot (groove) interference of grating. It has been observed that after a step with enough stages reflects the incident noise of a certain intensity, the tone of a certain frequency band will be obtai...
Show More
-
Short-Term Lagrangian Points and Research Using Elementary Methods
Huang Shaoshu,
Wu Shouchong,
Huang Xu
Issue:
Volume 1, Issue 1, March 2019
Pages:
13-17
Received:
21 February 2019
Accepted:
2 April 2019
Published:
13 April 2019
Abstract: Since Euler and Lagrange have calculated and proved that the three-body problem in the celestial movement has the so-called Lagrangian point, the human study of the Lagrange point has not stopped. Lagrange points have a pivotal strategic position in aerospace engineering, so the calculation of Lagrange points also has important scientific significance. In this paper, we establish a simplified model of the circular motion of the binary system, and use the elementary method to roughly calculate the position of the five Lagrangian points of the Earth-Month system, and through computational studies, we believe that there are only four Lagers in the binary system with equal or similar mass. Lange point.
Abstract: Since Euler and Lagrange have calculated and proved that the three-body problem in the celestial movement has the so-called Lagrangian point, the human study of the Lagrange point has not stopped. Lagrange points have a pivotal strategic position in aerospace engineering, so the calculation of Lagrange points also has important scientific significa...
Show More
-
Detailed Explanation of the Basic Problems of Three-Phase AC Circuits
Issue:
Volume 1, Issue 1, March 2019
Pages:
18-24
Received:
18 April 2019
Accepted:
14 May 2019
Published:
27 May 2019
Abstract: Three-phase alternating current is the most important and important energy in all fields of life, production and technology. However, due to the inevitable limitations of textbook writing, some basic problems of three-phase AC circuits have always brought teaching work. A certain degree of trouble. According to the principle of three-phase alternator, based on the laboratory experiment, combined with the connection and matching mode of the armature winding and the load and the corresponding phasor diagram, the line voltage, phase voltage, line current, phase current, etc. The basic physical quantities of the three-phase AC circuit and the relationship between them are explained.
Abstract: Three-phase alternating current is the most important and important energy in all fields of life, production and technology. However, due to the inevitable limitations of textbook writing, some basic problems of three-phase AC circuits have always brought teaching work. A certain degree of trouble. According to the principle of three-phase alternat...
Show More
