JP2605696B2 - Guidance flying object steering system - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a steering device for a guided flying object such as a missile.

[Prior Art] Conventionally, motors (servo motors and the like) and electromagnetic solenoids have been used as steering devices for guided flying objects. That is, for example, as shown in FIG.
The steering wing 12 is mechanically driven around the axis m by these drive sources to steer the flying object.

[Problems to be Solved by the Invention] By the way, it is desirable that the guided flying object itself is compact and lightweight. Nevertheless, mounting these steering devices causes problems such as requiring extra space, having a complicated arrangement structure, and increasing the weight.

The present invention has been made in view of such a problem, and an object of the present invention is to realize a steering device for a guided flying object which is simplified in structure and reduced in size and weight.

[Means for Solving the Problems] The present invention employs the following means to achieve the object. That is, a steering blade including an elastically deformable blade core and piezoelectric bodies attached to both sides of the blade core is provided, and different displacements are applied to the piezoelectric body on both sides of the steering blade. It is characterized in that the steering wing is curved.

[Operation] With such a means, by applying different displacements to the piezoelectric body on both sides of the steering wing, the entire wing including the wing core is elastically deformed by the stress, and this is used as the steering angle displacement. Can be.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 shows a cross section of a steering device for a guided flying object according to the present embodiment.
A plurality of piezoelectric members 3 are provided symmetrically on both sides of a thin plate of an elastically deformable material, and the whole forms a central portion of the blade 1. A front edge 5 and a rear edge 6 are fixed to the blade core 2 at both ends of the piezoelectric body 3 by sandwiching them. The wing 1 thus configured
A stretchable film 7 is stuck on the entire surface of the.

As shown in FIG. 2, the piezoelectric body 3 is formed by laminating a large number of thin plate-shaped piezoelectric elements 3a with an electrode 3b interposed therebetween. FIG. 2 is an enlarged view showing a part of the piezoelectric body 3 attached to the upper wing.

FIG. 3 is a partially enlarged view of the piezoelectric body 3. As shown in the figure, the piezoelectric element 3a has an effect of extending in the vertical direction with respect to the electrode 3b as shown in FIG. 4 (a) depending on the polarity of the voltage applied to the opposed electrode 3b (hereinafter referred to as a vertical effect). ) And an effect of shortening in the vertical direction as shown in FIG. Here, for convenience, when a positive voltage is applied to the front side F surface and a negative voltage is applied to the back side B surface of the piezoelectric element 3a as shown in FIG. 4, a vertical effect is produced. When a positive voltage is applied to the surface B, a lateral effect is generated.

That is, as shown in FIG. 3, the arrangement of the piezoelectric elements 3a described above is alternately reversed with the electrodes 3b interposed therebetween such that the F and F planes and the B and B planes face each other. The electrodes 3b abutting on the F surface are all connected to the same power terminal p and the B surface so that the same voltage is applied to the front side and the back side of each piezoelectric element 3a. The contacting electrodes 3b are all connected to the same power supply terminal q. Thus, when the power is turned on, the piezoelectric elements 3a simultaneously exert the same effect, and a vertical displacement and a horizontal displacement of the piezoelectric body 3 can be obtained as a whole.

On the other hand, FIG. 5 is an enlarged view of a part of the piezoelectric body 3 arranged on the lower wing portion, and as shown in FIG. Electrodes 3b abutting on the front side F surface and the back side B surface of the piezoelectric element 3a are connected to opposite terminals in both figures.

Thus, for example, when a positive voltage is applied to the terminal p and a negative voltage is applied to the terminal q, a vertical effect appears on the piezoelectric element 3a in FIG. 3, whereas a horizontal effect appears on that in FIG.

In this way, the upper wing portion and the lower wing portion impart a reversed displacement to the mutual piezoelectric body 3 with the wing core 2 interposed therebetween, and this can be used as a steering angle displacement as described below. is there.

Now, suppose that a vertical effect occurs in the piezoelectric element 3a in the upper wing, and a lateral effect occurs in the piezoelectric element 3a in the lower wing. Then, in the upper wing, the stress generated thereby acts on the front and rear edges 5, 6, and the upper wing-side end faces 5a, 6a of the edges are pressed in the direction of arrow I in FIG. On the other hand, the lower wing absorbs this pressing force by shrinking in the direction of arrow II in FIG. As a result, as a whole, the wing 1 and the wing core 2 are curved so that the upper wing side in FIG. That is, this sled can be used as a steering angle displacement, and can function as a steering means having an upper wing portion as a suction surface and a lower wing portion as a pressure surface.

Conversely, when the piezoelectric element of the upper wing portion exerts a lateral effect and that of the lower wing portion exerts a longitudinal effect, a stress is generated in the upper wing and the lower wing in a direction opposite to that described above, and the wing 1 becomes the sixth wing. The upper wing side in the figure is curved so as to form a concave shape, so that it is possible to function as a steering means having an upper wing portion as a pressure surface and a lower wing portion as a suction surface.

For these operations, if the magnitude and polarity of the applied voltage are appropriately controlled for each of the plurality of attached wings, the guided flying object which can arbitrarily select the steering direction and size as a whole flying object can be obtained. A steering device can be realized. In addition, the steering apparatus according to the present embodiment can be configured to be lightweight and compact, and furthermore, since the electrodes are arranged opposite to each piezoelectric element, the steering apparatus can operate sufficiently even at a low voltage of about 100 V or less and obtain a large displacement. It has the advantage that can be. Furthermore, the feature of the piezoelectric element is that the amount of current may be small, so that the power consumption is small and the mounted power supply is small.

Accompanying this, it goes without saying that the number of failures is small and the reliability is improved.

It should be noted that, in addition to the above configuration, the present invention is configured by laminating a thin plate-like piezoelectric element 8 in parallel with the plane of the blade core 9 as shown in FIG. Front and rear edge 10
May be pressed. In addition, various modifications can be made to the configuration of the piezoelectric body without departing from the spirit of the present invention.

[Effects of the Invention] The present invention can provide a steering device for a guided flying object that has a simple structure and is reduced in size and weight by the above configuration.

[Brief description of the drawings]

1 to 6 show an embodiment of the present invention. FIG. 1 is a perspective view showing the inside with a part cut away, and FIG. 2 is an enlarged view of a piezoelectric body attached to one surface of the wing. FIG. 3, FIG. 3 is a partially enlarged view of the piezoelectric body, FIG. 4 is an explanatory view of the operation of the piezoelectric element, FIG. 5 is a partially enlarged view of a piezoelectric body attached to the other surface of the wing, and FIG. It is an operation explanatory view of a steering wing. FIG. 7 is a sectional view showing another embodiment. FIG. 8 is a perspective view showing a conventional example. DESCRIPTION OF SYMBOLS 1 ... Steering wing, 2 ... Wing core 3 ... Piezoelectric body, 3a ... Piezoelectric element 3b ... Electrode 5, ... Leading edge 5a ... End face, 5b ... End face 6 ... Trailing edge, 6a …… End face 6b …… End face, 7 …… Film

Claims (1)

(57) [Claims] 1. A steering blade comprising an elastically deformable blade core and piezoelectric members attached to both sides of the blade core, and different displacements are applied to the piezoelectric member on both sides of the steering blade. A steering apparatus for a guided flying object, characterized in that the steering wing is curved by the above.