JPH05118796A - Decelerating method for missile - Google Patents

Abstract

PURPOSE:To smoothly decelerate an entire missile so controlled to steer tail steering wings in a special direction by an auto-pilot unit as to increase only the resistance of the tail steering wings of the missile having the auto-pilot unit and the four or more tail steering wings. CONSTITUTION:A front body 1 is separably coupled to a rear body 2 by a coupling band 4 in a missile. When the body 1 is separated from the body 2, a steerable tail wing, i.e., steering wing 8 provided at the body 2 is steered by an auto-pilot unit 9 in a direction for inhibiting any of rolling, pitching and yawing motions at the missile. Then, the band 4 is cut and blown out by gunpowder mounted at the band 4 while holding the state. Since the wing 8 is in a steering state, its resistance is increased to decelerate the body 2, and the body 1 is effectively separated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of decelerating a flying object.

[0002]

[Prior Art]

First example of prior art: In a flying vehicle, it may be required to separate the front fuselage and the rear fuselage in the sky. FIG. 8 is a side view of a flying body having a conventional separating mechanism. In the figure, 1 is a front body of a flying vehicle, 2 is a rear body of the same, 3 is a tail, 4 is a connecting band for connecting the front body and the rear body, 5 is a front body and is equipped with a rear body at the time of separation. It is a push rod that pushes the body.

FIG. 9 is a side view of the flying body in a separated state. When the separation is performed, first, the band is cut and blown by the action of the gunpowder attached to the band. After that, the push rod is operated to push the rear body from the front body and separate them from each other.

Second example of the prior art: In a flying vehicle, when flying at supersonic speed in the sky, the front body and the rear body are separated from each other, and the front body is gently lowered by a parachute. Observation with a measuring instrument housed inside the body is continued for a long time, recording devices etc. mounted on the body are collected, and the body is composed of underwater vehicle. In some cases, it may be required to safely land it on the surface of the sea.

FIG. 10 is a side view of a flying body provided with a parachute as a conventional front body slowing-down device, and FIG. 11 is a side view of a front body of the flying body in a state in which a supersonic parachute is opened. FIG. 12 is a side view of the front body of the flying body in a state where the low speed parachute is opened. In the figure, 1 is a front fuselage, 2 is a rear fuselage, 3 is a tail, 6 is a small supersonic parachute equipped at the rear end of the front fuselage, 7
Is a large low-speed parachute equipped in a similar position.

When the front body is slowly lowered from the supersonic flight state in this flying body, the front body and the rear body are separated at the time of supersonic flight, and first shown in FIG. As described above, the parachute 6 for supersonic speed is opened, the speed is reduced to the transonic speed, and then the parachute 7 for low speed is opened as shown in FIG. 12, and the front body is gently lowered.

[0007]

In the first conventional example, it is necessary to equip a forced separation mechanism such as a push rod, which causes a problem that the performance of the flying vehicle is deteriorated due to an increase in weight and the like. was there.

In the second conventional example, a large impact force is applied when opening the supersonic parachute, which is not preferable. In addition, there is a problem that the umbrella does not open due to the Breathing phenomenon (a phenomenon in which the parachute repeatedly contracts and expands by sucking and removing air, which causes the parachute to repeatedly contract and expand), which is peculiar to opening a supersonic parachute in a supersonic state. Sometimes ended in.

The present invention solves the problems in each of the above-mentioned examples, and means to decelerate the rear fuselage to separate it from the front fuselage without increasing weight, or to fly safely without impacting the fuselage. It seeks to provide a means of slowing the body down from supersonic to transonic speeds.

[0010]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and in a flying vehicle equipped with an autopilot device and four or more tail steering blades, the steering blades are
The flying object is characterized by decelerating the flying object by steering in a specific direction defined by the autopilot device so that the rolling object does not undergo any roll, pitch, or yaw motion and only resistance increases. It relates to the method of decelerating the body.

[0011]

According to this method, the lift forces of the respective steering blades cancel each other out, and only the drag force is generated in the same direction. In addition, since the steering wings are equipped in the tail, the drag force is generated behind the center of gravity, and the flying body remains stable. Therefore, the flying body steadily decelerates.

[0012]

1 is a side view of a first embodiment of the present invention, and FIG. 2 is a side view of the same embodiment in a separated state. This embodiment is an improvement of the first example of the prior art. In the figure, 1 is a front fuselage, 2 is a rear fuselage, 4 is a connecting band that connects the front fuselage and the rear fuselage, 8 is a steerable tail blade provided on the rear fuselage, that is, a steering wing, and 9 is a rear portion. It is an autopilot device provided on the body. The autopilot device is for moving the steerable tail.

In this embodiment, when the front body and the rear body are to be separated from each other, first, by the autopilot device, which will be described in detail later, the steering blade 8 is moved in any of roll, pitch and yaw motions. Also, steer in a direction that does not cause the flying body, and while keeping that state, as shown in FIG. 2, the binding band is cut and blown off by the gunpowder attached to it. Since the steering wing is in the steering state, the resistance increases and the rear fuselage slows down and moves away from the front fuselage.

Although the present embodiment shows the case where the auto-pilot device is provided in the rear body, the auto-pilot device may be provided in the front body. In that case, after the steering state as described above, a lock device for holding the state is provided on the rear body side. This is because the deceleration of the rear body after separation is continued, collision is prevented, and separation is performed safely.

FIG. 3 is a side view of the second embodiment of the present invention, and FIG.
Is a side view of the same embodiment in a decelerating state, and FIG. 5 is a side view of the same embodiment in a slow descent state. This embodiment is an improvement of the second example of the prior art. In the figure, 1 is a front body, 2
Is a rear fuselage, 8 is a steerable tail fin provided on the rear fuselage, that is, a steering wing, 9 is an autopilot device provided on the front fuselage, and 7 is provided on a rear end of the front fuselage It is a large, low-speed parachute.

In this flying vehicle, when it is desired to slowly lower the front fuselage from the supersonic flying state, first, the autopilot device is used to set the steering blades 8, and the details will be described later. As shown, steer in a direction that does not cause roll, pitch, or yaw motions of the vehicle, and maintain that condition. Since the tail fin is in the steering state, the resistance increases and the flying body decelerates from supersonic speed. When the vehicle becomes transonic, it separates the front and rear fuselage. At the time of this separation, although not shown in the figure, in accordance with the order shown in the first embodiment, the bonding band is cut and blown off, and the rear body is decelerated
Move away from the front torso. After the rear body is sufficiently far away, the front body is slowly lowered by opening the low speed parachute as shown in FIG.

Since it is necessary for the rear fuselage to continue decelerating even after the rear fuselage is separated, when the autopilot device is provided on the front fuselage side as in this embodiment, the rear fuselage is A lock mechanism for holding the rudder angle is provided on the side. If the autopilot device is provided on the rear fuselage side, the lock mechanism is not necessary.

FIG. 6 is a system diagram of an autopilot device common to both the above embodiments, and FIG. 7 is a steering angle definition diagram of a steering wing driven by this device. In FIG. 6, in the guide section, during the guide flight, the roll φ, the pitch θ, the attitude angle of the yaw ψ and the angular velocity are fed back, and steering is performed so as to match the commanded attitude angles φ _c , θ _c , ψ _c. Command, δφ
_c , δθ _c , and δψ _c are output (posture angle control). The steering commands are combined, and the steering angle commands δ ₁ , δ ₂ , δ are sent to each steering blade.
₃ and δ ₄ are output.

When the deceleration described in each of the above-described embodiments is performed by this autopilot device, the acceleration A _{x in} the machine axis direction is fed back in addition to the attitude angle control so that the command acceleration (deceleration) A _xc coincides. Steering command δα _c
Is output. This steering command δα _c is combined with the above-mentioned steering commands δφ _c , δθ _c , δψ _c , and the steering angle commands δ ₁ , δ ₂ , δ ₃ , δ ₄ are output to each steering blade. When four steering blades are provided in the shape of a cross in the rear of the center of gravity by this device, the four steering blades are steered so that the adjacent steering blades face in opposite directions to each other. , Yaw can be decelerated without causing any movement. Therefore, in this case, it is possible to decelerate at a certain deceleration while maintaining the posture angle. The control unit receives the command steering angle and steers the steering blade. In this device, since the resistance can be changed by changing the steering angle and the deceleration can be adjusted, the flying object can be decelerated without giving an impact to the flying object.

As described in detail above, in a vehicle equipped with a steerable tail, that is, a steering wing, by using the autopilot device for deceleration, the front fuselage as shown in the first embodiment is used. When separating the vehicle from the rear fuselage, the drag can be increased only on the rear fuselage, which facilitates the separation, and can increase the relative speed difference at the time of separation, reducing the possibility of tail collision. Become. Therefore, the forced separation mechanism such as the push rod used in the first example of the prior art becomes unnecessary, the weight of the flying object is reduced and the extra volume is reduced, and the performance of the flying object is improved. You can

In the same manner as described above, in the flying body provided with the steering wings, when the front body as shown in the second embodiment is slowly lowered from the supersonic state, the flying body should be given a shock. Instead, since the flying body can be decelerated from supersonic speed to transonic speed in advance, the speed reducer such as the supersonic parachute shown in the second example of the prior art is unnecessary, and the volume and weight of the speed reducer storage portion are reduced. Can be reduced,
The performance of the flying object can be improved. Further, since the breathing phenomenon of the supersonic parachute which has conventionally occurred is eliminated, the unsuccessful slow descent of the front fuselage due to the non-opening of the supersonic parachute is eliminated.

[0022]

In the method of decelerating a flying object of the present invention, the autopilot device determines that the steering wings do not cause any motion of roll, pitch, or yaw on the flying object, and increase only the resistance. Since the same vehicle will be decelerated by steering in a specific direction, there will be no increase in weight or volume of the vehicle, and no impact on the vehicle. It can slow down the entire body.

[Brief description of drawings]

FIG. 1 is a side view of a first embodiment of the present invention.

FIG. 2 is a side view of the same embodiment in a separated state.

FIG. 3 is a side view of the second embodiment of the present invention.

FIG. 4 is a side view of the same embodiment in a decelerated state.

FIG. 5 is a side view of the same embodiment in a slowly descending state.

FIG. 6 is a system diagram of an autopilot device common to both embodiments.

FIG. 7 is a steering angle definition diagram of a steering wing driven by the same autopilot device.

FIG. 8 is a side view of the flying body of the first example of the related art.

FIG. 9 is a side view of the flying object in a separated state.

FIG. 10 is a side view of a flying body of a second example of the related art.

FIG. 11 is a side view showing a state in which a parachute for a supersonic speed is opened on a front body of the flying body.

FIG. 12 is a side view of the front body of the flying body in a state where a low speed parachute is opened.

[Explanation of symbols]

 1 Front fuselage 2 Rear fuselage 3 Tail wing 4 Coupling band 5 Push rod 6 Supersonic parachute 7 Low speed parachute 8 Steering wing 9 Autopilot device

Claims (1)

[Claims] 1. A flying vehicle comprising an autopilot device and four or more tail steering blades, the steering blades causing no roll, pitch, or yaw motions on the flying body, and only resistance increases. As described above, the method of decelerating the flying object is characterized by decelerating the flying object by steering in a specific direction defined by the autopilot device.