JP2002346016A - Simulator for golf swing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a simulator for golf swing useful for training (subjective recognition) with an accurate image to golf swing while visually realizing (objectively recognizing) the characteristic of golf swing by abstracting and modeling the essential part of the golf swing in view of the various and complicated nature of the golf swing influenced by physical and metal characteristics and a habit based on experience in addition to a chaotic dynamic characteristic inherent in itself. SOLUTION: This simulator is based on a double pendulum with two pendulums connected above and below. The upper pendulum is a left arm, the lower pendulum is a club, and a connection part is a grip. Conditions such as the horizontal shift of an upper rotation axis of the upper pendulum (the rotation of the shoulder), the vertical motion of an upper rotation axis of the upper pendulum (head up), and the braked rotation of a connection part between the first pendulum and second pendulum (stiff motion of the grip and a cock) are added to the movement of the double pendulum for the simulation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus (simulator) for grasping the basic characteristics of a golf swing and improving the image of the golf swing.

[0002]

2. Description of the Related Art As a conventional device for training an image of golf, a golf game using a computer is the most imaginable device, and a golf ball is actually swung indoors to hit a ball, and the direction of the ball and There is also an apparatus that determines a flight distance and the like and simulates the progress of play based on virtual golf course conditions set in advance. Alternatively, a strobe photograph analysis of a golf swing or a swing check using a digital camera has recently been performed to improve the image or change the image. Although there are devices and means for performing such image training, there is no device or method for improving the image by moving a small model while objectively observing the essential characteristics of the golf swing.

[0003]

A core basic element of golf is that a club head accelerated by a swing in which a club and a body are integrated collides with a stationary ball,
To fly the ball. Anyone hitting a stationary ball and before starting golf would have imagined it as easy. However, when I started,
Even when the club hits the ball a little, it turns right and left, and when it goes straight away, high risks are noticeable and high returns are not easily achieved. After trial and error through practice and play, you will be complacent with your own unwilling but unwilling swing while trying to consolidate your score. Also, even if you read and fish a lot of textbooks by professional golfers and others, the trajectory of the ball clearly shows that the body and the club are not moving according to the textbook. Some textbooks may seem to be based on the expressive power of the author and the reading comprehension of the reader, but the content of the commentary is not clear between common and different parts, There are many very sensory expressions that are likely to have different understandings. “Grips hold golf”
And while it is explained concretely emphasizing its importance,
The end result is equivalent to saying, "Grips are individual." In addition, it seems that such a tendency is not limited to only the grip but extends to the entire swing.

[0004] Now, why does seeming at first glance seem so complicated? It is natural to think that there is some grounds for this. In the science of complex systems, which has recently attracted attention in various fields, it is said that complex phenomena do not always occur due to complex causes, but can also occur from simple causes (rules). As an example, even in the dissipative single pendulum where the friction of the rotating part and the air resistance act, if it starts from the initial state where the angle of displacement (deviation from the state of standing directly below) is small, it becomes monotonous damped vibration, When a periodic weak force is applied in some way, the vibration becomes the same as that of the same period (vibrations such as a pendulum of a watch are similar). When a strong periodic force is applied, the swing of the pendulum increases. Due to the nonlinear effect that the restoring force due to gravity is not proportional to the deflection angle, the period is 2
.., 4 ×, 8 ×... Immediately after the cycle becomes infinite, chaos changes irregularly. There seems to be no precise definition of chaos yet. Here are some expressions about chaos, excerpted from mathematics and physics. (1) Chaos is an irregular movement that is difficult to predict, such as irregular movement of the atmosphere, falling leaves, turbulent flow of a river, or movement of a ball of roulette or a slingshot. (2) Chaos is a bounded, aperiodic, unstable motion produced by simple deterministic nonlinear laws. (3) A phenomenon in which the nonlinear effect makes the behavior of the system unpredictable is called chaos. (4) In an irreversible system, as time passes, it is sucked into several motion states. Such a relaxed state is called an attractor. In chaos, it forms a strange attractor unique to the system. (The above four motion states of the simple pendulum show an example of an attractor.) (5) Chaos has a "sensitive dependence on the initial state" in which the first minute difference makes a huge difference later. I have. (6) To generate chaos, three or more variables are required in a system with continuous time. (7) Despite being governed by the deterministic laws of motion, chaos shows contingency over a long period of time and is an infinitely complex aperiodic motion, but it is subtlely self-organized. In a dissipative system, a neat form attractor consisting of a self-similar nested structure (fractal) is formed. This can be said to be a typical figure of a flowing nature. From these expressions, it can be felt that the golf swing is not easy and is in the category of chaos.

[0005] As described above, in addition to the chaotic mechanical characteristics inherent in the golf swing, the golf swing is conscious or unconscious everywhere due to the physical and psychological characteristics of each golfer and habits based on experience. , So it is very diverse, complex and subtle. Even if it is a professional golfer, it would be very difficult to accurately describe this in a golf textbook so that it can be used by anyone. Also, even if it can be expressed, it seems that it is even more difficult for amateur golfers to read the core from the textbook. At present, there is no textbook that analyzes the chaotic mechanical properties of golf swings and explains the essence of golf swings.In addition to knowing the limitations of golf textbooks, golfers inevitably say that golf swings are chaotic. Awake and aware of the "natural reason" and "essence of the swing" that there is, "the golf swing is for each person," and must acquire a better swing with each sense, sensitivity and effort. Although this is very difficult, I focused on the fact that a model that can be recognized and realized by experimenting with it is effective as a means to improve the image. According to the present invention, a golf swing can be realized while visually realizing (objectively recognizing) the essential characteristics of the golf swing by abstracting → modeling → modeling the essential part of the golf swing. The purpose is to provide a device (simulator) that is useful for training (subjectively recognizing) with an accurate image.

[0006]

SUMMARY OF THE INVENTION In order to make a model capable of simulating a golf swing, modeling of a golf swing was attempted. Short putting can be modeled as a single pendulum, but other golf swings are based on a double pendulum, even if simply modeled. The motion state of the simple pendulum is determined by two variables, the angle of displacement and the angular velocity.
In the above-described simple pendulum chaos, there are three variables because a strong periodic force is added as a variable. This satisfies the condition shown in (6) of the expression of chaos. In the double pendulum, there are four variables by adding the angle and angular velocity of each displacement of the upper and lower pendulums. Therefore, it is possible to create chaos. In the structure of the double pendulum, the upper rotating shaft of the upper pendulum serves as a support shaft, and the two pendulums are connected vertically by a rotating shaft. The movement includes, in addition to the movement of the double pendulum, a movement of shifting the upper rotation axis of the upper pendulum horizontally at right angles to the axis and a movement of moving the upper rotation axis of the first pendulum up and down at right angles to the axis. did. The upper pendulum is the left arm, the lower pendulum is the club, and the connection is the grip. The horizontal shift of the upper rotation axis of the upper pendulum is the rotation of the left shoulder, and the vertical movement of the upper rotation axis of the upper pendulum is the head-up.

[0007] A golf swing simulator based on such modeling is based on a double pendulum in which two pendulums are connected up and down, and fixed or fixed to the upper rotation axis of the first pendulum (upper pendulum). The behavior of a double pendulum that allows a horizontal shift perpendicular to the axis or a vertical movement perpendicular to this axis and is deployed starting from any point within the range in which the lower end of the second pendulum (lower pendulum) can move It is a device that can observe. In addition, the rotation of the connection point between the first pendulum and the second pendulum can be braked by a friction type brake or the like, or an iron piece is attached to the lower part of the first pendulum, and the side of the iron piece position when the pendulum naturally stops (iron piece An electromagnet or the like is attached at a position independent of the double pendulum in close proximity to the side of the vibration trajectory of the first pendulum so that the movement of the first pendulum can be braked as needed when the iron piece passes near the electromagnet. Furthermore,
It has a function that allows the ball to be hit at the lower end of the first pendulum so that a ball that has been teeed up or the like can be set on the lowermost track of the first pendulum at any time. The present invention uses such a simulator to improve the image of a golf swing.

[0008]

The simulator according to the present invention is characterized in that a golf swing is modeled and linked to chaos in the science of complex systems to infer the essence of the golf swing and to grasp the characteristics of the golf swing to improve the image. I have.

A simulation is performed using the simulator of the present invention. First, when the upper rotation axis of the first pendulum was fixed and the double pendulum was shaken from the initial state of small displacement, energy such as friction of the rotating part and air resistance was dissipated in a state close to linear. It gradually attenuates and comes to rest while reciprocating. This process is deterministic, close to predictable regular periodic motion. Next, fix the upper rotation axis of the first pendulum, raise the first pendulum to the same height as the upper rotation axis of the first pendulum, and raise the second pendulum 45 degrees above the extension of the first pendulum. When vibration is performed with a state of a large displacement increased as an initial state, irregular and remarkable movements that are difficult to predict in a nonlinear state: so-called chaos occur. The boundary between the two motion states according to the magnitude of the displacement in the initial state is delicate. Furthermore, in a state where the first pendulum is raised above the height of the upper rotation axis of the first pendulum, the second pendulum is also raised above the extension of the first pendulum and naturally stops momentarily (the top state of the back swing), When the rotation axis of the first pendulum is horizontally shifted, the rotation of the first pendulum is accelerated while being pulled, and the angle (cock angle) between the second pendulum and the first pendulum becomes smaller (the cock becomes deeper). This will help keep the club head running at impact and motivate chaos.
Further, when the upper rotation axis of the first pendulum is moved up and down at right angles to the axis immediately before the impact, subtle changes in the trajectory and speed of the lower end of the second pendulum are observed.

When comparing the diversified, complex and slow-moving chaotic movements of such a double pendulum with the movements of the actual golf swing that are less dynamic, what is the difference? A simple question arises as to whether this is caused. On the other hand, golfers are interested in how to effectively control the genetically incorporated chaos in the golf swing and make the club head the fastest state at impact. Springs up. The former question is analogized to the fact that the low-friction rotation of the simulator is related to grips and cocks that are overpowered in the actual swing. Also, the latter's interest is that despite chaos being genetically incorporated at the top of the backswing, the dynamic body chaos and the instability of the rotation axis have eliminated the dynamic chaos. Therefore, it is guessed that it would be good if some timing could be used to find the timing of utilizing chaos. By practicing and playing with such analogy in mind, and using the simulator of the present invention, by devising various conditions by trial and error, a sophisticated self-organized golf swing image that controls chaos The effect of finding out is produced.

[0011]

1 shows a golf swing simulator 1 according to the present invention.
Here is an example. (Example 1): When a small displacement is applied to the tip of the stationary second pendulum, the second pendulum gradually attenuates and stops while reciprocating. (Embodiment 2): The first pendulum is raised to the same height as the upper rotation axis of the first pendulum, and the second pendulum is also raised about 45 degrees above the extension of the first pendulum, so that the state where the displacement is large is reduced. When vibrated as an initial state, the irregular penetrating movement is remarkable, especially the second pendulum violently rotates clockwise and counterclockwise. After that, the kinetic energy and the potential energy are dissipated due to friction or the like, and a transition is made to the first embodiment. (Embodiment 3): The first pendulum is raised above the height of the upper rotation axis of the first pendulum, the second pendulum is also raised from the extension of the first pendulum, and naturally stopped for a moment (top of backswing) In the state (1), when the horizontal rotation of the upper rotation axis of the first pendulum is performed, the rotation of the first pendulum is accelerated while being pulled, and the angle (cock angle) between the second pendulum and the first pendulum becomes small ( The cock gets deeper). (Embodiment 4): When a friction type brake is applied to the two rotating parts of the double pendulum and braking is applied to the rotating parts, irregular movement does not occur even when starting in the state of the second embodiment. It is also possible to shift to one exercise. This is analogous to the fact that excessive force on the left shoulder, arms and hands results in a swing with poor punching power. (Embodiment 5): An iron piece is attached to the lower part of the first pendulum, and approaches the side of the iron piece position when the pendulum naturally rests (the side of the vibration trajectory of the iron piece). When the electromagnet is attached to the mounting frame of the heavy pendulum and the swing is lowered from the naturally stopped state (back swing top state) of the third embodiment, the first pendulum is braked when the iron piece passes near the electromagnet. Then, the second pendulum starts to rotate violently. This resembles the twist of the left arm at impact. (Embodiment 6): The ball is placed at the lower end position of the second pendulum that has stopped still naturally, and starts to vibrate from a state higher than the initial state of Embodiment 2 (a state that is close to a handstand with respect to the naturally stopped state). In particular, the second pendulum hits the ball after performing a very irregular operation such as turning clockwise or counterclockwise for a while, which is more irregular and slower than that of the second embodiment. Similarly, when the ball is placed and hit in the first embodiment, the ball is reliably hit with a single stroke. Similarly, in Example 2, the probability of hitting the ball in a single stroke is high. From these results, the simulator clearly states that if the backswing is exceeded, the impact will be very difficult.

[0012]

According to the golf swing simulator of the present invention, each golfer has a fresh interest in the dynamic chaos genetically incorporated in the golf swing while comparing his or her own swing and its image. On the other hand, observing the diversified, complex and slow movements of the double pendulum has the effect of promoting the improvement of the image to acquire a better swing unique to the individual. In addition, as an adult toy, it helps to understand the chaos phenomenon lurking in various phenomena such as not only the theory and practice of golf swing but also various activities such as economic activities that involve the natural world from the biological world to the universe and human psychology. This is an unexpected effect.

[Brief description of the drawings]

FIG. 1 is a diagram of an example of a golf swing simulator.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... 1st pendulum 2 ... 2nd pendulum 3 ... Upper rotating shaft of 1st pendulum 4 ... Mounting frame of double pendulum (made by a transparent plate, represented by the dotted line) 5 ... Horizontal shift stand 6 ... Horizontal shift Guide 7 ... Spring for horizontal shift 8 ... Support rod for the mounting frame of the double pendulum (When the rod is removed, the frame is shifted horizontally by the spring for horizontal shift) 9 ... Stopper for the support rod 10 ... Screw for fixing the upper rotating shaft 11: Spring for vertically moving the upper rotating shaft (can be moved up and down by loosening the upper rotating shaft fixing screw) 12: Iron plate attached to the lower part of the first pendulum 13 ... Electromagnet attached to the mounting frame of the double pendulum

Claims (4)

[Claims] An upper rotating axis of a first pendulum (upper pendulum) is fixed or horizontally shifted at right angles to the axis or based on a double pendulum in which two pendulums are connected vertically. A golf swing simulator that can move up and down at a right angle and observe the behavior of a double pendulum deployed starting from any point within the range in which the lower end of the second pendulum (lower pendulum) can move 2. The golf swing simulator according to claim 1, wherein the rotation of the connection point between the first pendulum and the second pendulum can be braked by a brake. 3. An iron piece is attached to a lower part of the first pendulum, and a magnet is placed at a position independent of the double pendulum by approaching a side face (a side face of a vibration track of the iron piece) of the iron piece position when the pendulum naturally stops. 2. The golf swing simulator according to claim 1, wherein the movement of the first pendulum can be damped when the iron piece passes near the magnet. 4. The golf swing simulator according to claim 1, wherein the ball is set on the lowermost track of the second pendulum and the ball can be hit with the lower end of the second pendulum.