JPH0338489A - Method and device for testing hydrofoil craft - Google Patents

Abstract

PURPOSE:To make it possible to check dynamic characteristics such as those in run by blades by measuring the gain of a control signal generation means or phase difference of a control signal based on the control signal from the control signal generating means using an AC signal for an input signal. CONSTITUTION:A sine wave of a frequency set by a setting circuit 44 in an AC signal generating circuit 42 is guided to a line 45 and given to an input terminal Pi. A control circuit Ci included in a control signal generating means 41 gives a control signal to an output terminal Qi corresponding to an input signal given to this input terminal. Out-puts from lines 45, 46 are given to a gain gauge 47, a DC voltage V3 expressing the gain of the control circuit Ci is taken from a line 48, and a sine wave through the line 45 and an output of the control circuit Ci through the line 46 are given to a phase difference gauge 63, so a DC voltage V5 expressing the phase difference is given to a line 64. By thus checking the dynamic characteristics of the control circuit Ci, or its frequency characteristics, a hydrocraft can be tested.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method and a device for testing hydrofoils with wings at the stern and at the bow.

BACKGROUND ART Conventionally, in order to test whether the control signal generating means for driving the wings etc. installed on such hydrofoil vessels operates normally, a DC voltage has been applied as a simulated signal. Instead of inputting information, the output of the control circuit that controls the wings, etc. is measured, and in this way underwater gtQ tests are conducted.

Problems to be Solved by the Invention In such prior art, a DC voltage is input to the control signal generating means to perform a simulated operation.

Therefore, since it was only possible to check the static DC gain of the side signal generating means, it was not possible to perform tests similar to those during actual wing flight, and the possible range of tests was limited. .

SUMMARY OF THE INVENTION An object of the present invention is to provide a method and apparatus for testing a hydrofoil, which makes it possible to check the dynamic characteristics of a hydrofoil, such as during wing running.

SUMMARY OF THE INVENTION The present invention provides a system for providing wings on the bow and stern of a ship and for generating a force control signal for driving said wings in response to an input signal.
A testing method for a hydrofoil boat having a tw signal generating means and a means for driving a wing in response to a control signal from the control signal generating means, using an alternating current signal as an input signal, This is a test method for a hydrofoil boat, characterized in that the gain of the control signal generating means or the phase difference of the fli control signal is measured based on the control signal of the fli control signal.

The present invention also provides wings provided at the bow and stern, a control signal generating means for generating a control signal for driving the wings in response to an input signal, and a '$1 output from the control signal generating means.
In an underwater ship testing device having means for driving a wing in response to an fJ4 signal, an AC signal generation circuit that generates an AC signal and provides it as the input signal, and a III signal from the control signal generation means. A gain meter that measures the gain of the control signal generation means in response to a call signal, a comparison signal generation circuit that derives a signal representing a predetermined gain, and a difference between the respective outputs of the gain meter and the comparison signal generation circuit. It has a subtraction circuit, a pointer that makes an angular displacement, and a display board that indicates the range of the angular displacement of the pointer, and in response to the output of the subtraction circuit, the pointer moves to the angular position by the corresponding angular displacement amount and displays the pointer. The test device for a hydrofoil boat is characterized in that the board includes an indicator in which a range of angular displacement of a pointer is displayed in correspondence with a range of allowable gain.

Furthermore, the present invention provides wings provided at the bow and stern, control signal generating means for generating a control signal for driving the wings in response to an input signal, and a control 911 signal from the 11J control signal generating means. and means for driving the wings in response.

an AC signal generation circuit that generates an AC signal and supplies it as the input signal; a phase difference meter that measures the phase difference of the control signal 12 from the control signal generation means in response to the damping signal from the AC signal generation means; A comparison signal generation circuit that derives a signal representing a predetermined phase difference, a subtraction circuit that calculates the difference between each output of the phase difference meter and the comparison signal generation circuit, a pointer that angularly displaces, and a range that the pointer angularly displaces. The pointer is angularly displaced by the corresponding angular displacement amount in response to the output of the subtraction circuit, and the pointer is angularly displaced by the corresponding angular displacement amount on the display board. This is a test device for an underwater χ ship characterized by including an indicator displaying a range of angular displacement.

According to the present invention, the $IN signal generating means for generating a control signal for driving the blade in response to an input signal and applying it to the driving means, using an AC signal as the input signal, thereby By measuring the gain of the MM signal generating means or the phase difference of the control signal during actual wing flight, the dynamic characteristics can be checked in this way.

Furthermore, the gain of the control signal from such control signal generating means is measured by a gain meter, the output of the gain meter is compared with a signal representing a predetermined gain, the difference is determined by a subtraction circuit, and this difference is determined as the instruction. It can be determined that the control signal generating means is operating normally when the pointer of the meter is within the allowable gain range of the display board. This can also be similarly tested by checking the phase difference of the control signals from the control signal generating means.

The frequency of the alternating current signal can be varied manually or automatically by sweeping, or alternatively the alternating current signal may be varied in frequency to be extracted using an FFT (Fast Fourier Transformer). .

Embodiment FIG. 1 is an overall block diagram of an embodiment of the present invention.1 The control signal generating means 41 of the hydrofoil boat has an input terminal Pl.
and an output terminal Qi, and in response to an input signal applied to the input terminal Pl, the control circuit C1 included in the II ff signal generation means 41 derives a control signal to the output terminal Qi. The AC signal generation circuit 42 has a sine wave generation circuit 43 which is an AC signal, and a frequency setting circuit 44 for changing and setting the frequency of the sine wave. 45,
It is applied to input terminal PL. The waveform of the sine wave which is the alternating current signal derived to this line 45 is as shown in FIG. Vl is as shown in the first equation.

V1=vi・sin (ωt−θi)
...(1> Here, vi represents the amplitude, ω represents the angular frequency, and t represents the passage of time.

In the control signal generation circuit 41, an output waveform 2 shown in FIG. 3 is derived at the output terminal Qi.

V2 = vO-5in (ωt-θ0)
(2) Here, vQ is the amplitude of the IIIrM signal derived from the output terminal Qi to the line 46, and θ0 is the phase difference with the reference value.

Outputs from lines 45 and 46 are respectively applied to gain meters 47, and a DC voltage representing the gain of control circuit Ci is derived from line 48. The voltage V3 on this line 48 is the third
As shown in Eq.

The comparison signal generation means 50 generates a first comparison signal generation time 2851.
and a second comparison signal generation circuit 52.

A predetermined DC voltage is applied to the subtraction circuit 53 from the first comparison signal generation circuit 51 via a line 54 . The output voltage (4) of the M calculation circuit 53 is expressed by the fourth equation (%).Here, the DC voltage value derived from the first comparison signal generation circuit R51 via the line 54 is assumed to be VRG.

The output voltage 4 of the subtraction circuit 53 is amplified in an amplifier circuit 55 and displayed on an indicator 56 which is a DC voltmeter.

This indicator 56 has a pointer 5 which is angularly displaced around an axis 57.
8 and a display board 59 provided behind the pointer 58. The pointer 58 is angularly displaced by an angular displacement amount proportional to the output voltage of the amplifier circuit 55. On the display board 59, the allowable gain range is displayed as indicated by reference numeral 60, and the range in which the pointer 58 is positioned when it should be determined that the control circuit C1 is malfunctioning is indicated by reference numerals 61 and 62. Displayed as shown. Therefore, when the pointer 58 is within the allowable gain range 60, it can be determined that the control circuit C1 is operating normally, and when the pointer 58 is within the other ranges 61 and 62, it can be determined that the control circuit Cf has malfunctioned and is abnormal. It can be determined that

Also, by looking at the angular displacement position of this pointer 58, the degree of abnormality in the control circuit C1 can be known.

The sine wave via the line 45 and the output of the control circuit Ct via the line 46 are fed to a phase difference meter 63, and a DC voltage V5 representing the phase difference (θ0-θi) between them is outputted from the line 46.
4.

V5=kl-(θ0-θi)
-(5) where 1 is a constant. The output of phase difference meter 63 via line 64 is applied to subtraction circuit 65 .

A predetermined DC voltage VRP is applied to the subtraction circuit 65 from the second comparison signal generation circuit 52 of the comparison signal generation means 50 via a fin 66 . NJ! 4'*Circuit 65 derives on line 67 a voltage v6.

V6 = V5-VRP = kl・(θo-θi) −Vr(P
-(6) The signal from the subtraction circuit 65 via the line 67 is applied to the amplifier circuit 68, amplified, and applied to the indicator 69, which is a DC voltmeter. The indicator 69 has a configuration similar to that of the indicator 56 described above, and has a pointer 71 that is angularly displaced around the axis 70 and a display provided behind the pointer 71.
72, the allowable phase difference range is displayed as indicated by reference numeral 73, and a range 74.75 indicating an abnormality such as a failure is also displayed.

By checking the dynamic characteristics, that is, the frequency characteristics, of the control circuit Ci in this manner, the hydrofoil boat of the present invention can be tested.

Referring to FIG. 4, generally, when a step signal shown in FIG. 4 (1) is input to the input terminal Pi of the control signal generating means 41, the control circuit Ci responds to the step signal. An output waveform 76 or 77, which is a control signal shown in FIG. 4(2), is derived to the output terminal Qi. In the prior art, since a DC signal is given to the input signal Pi, only the output voltage, that is, the DC gain, is checked after the output waveform shown by reference numeral 7 in FIG. 4(2) has stabilized.
Therefore, it is not possible to know which of the reference numbers 7677 the step response waveform is.

In the underwater 21E boat, flaps 13, 14, and 18 to 21 (see later-described FIG. 10, etc.), which are wings provided at the bow and stern, are driven by a control signal derived from the output terminal Qi. At this time, when the flap was activated in response to waveform 76 and in response to waveform 77! [The behavior of the hull 1 is completely different when it is activated.] waveform 77
When the flap movement is expected, the output of the control circuit Ci should not be the waveform 76. That is, the output waveform of the control circuit C1 is 76 or 77 in FIG. 4(2).
It is necessary to test whether this is the case. Whether the output waveform of the control circuit C1 is waveform 76 or waveform 77 in FIG. 4(2), that is, the step response waveform, depends on the frequency characteristics of the control circuit Ci, the gain when changing the frequency, and In the present invention, an alternating current signal such as a sine wave is input to the input terminal Pi, and the frequency is changed to obtain a dynamic signal with such frequency characteristics. By measuring the characteristics, it is possible to test the dynamic characteristics of the control circuit C1 having the dynamic characteristics as shown in FIG.

FIG. 6 is a block diagram showing the electrical configuration of the hydrofoil. The input terminals P1 to P13 of the control signal generating means 41 are connected to an accelerometer 81 provided at the bow of the ship that detects acceleration in the vertical direction, that is, in the vertical direction, and lateral vibration outputs 83 and 2111 detected by the vertical gyro 82. Shaking output 8
4, the output of an accelerometer 85 that detects acceleration in the vertical direction on the port side of the stern, the output of an accelerometer 86 installed on the starboard side of the stern that detects acceleration in the vertical direction, and the output of a gyro 87 that detects the yaw speed. The output of the altitude sensing device 88 that detects the height between the sea surface and the sea surface; the output of the accelerometer 89 installed at the bow of the ship that detects lateral acceleration;
fQ depth command signal generation ports corresponding to each output and altitude F! The output of @91 and the output of the course holding circuit 92 are given.

In the control signal generation means 41, l11 (#11 circuit CI,
, C6 are provided. In response to each signal applied from the input terminals P1 to P13, control signals are generated by the control circuits C1 to C6 provided in the control signal generating means 41, and the forward flaps 1 are generated from the output terminals Ql to Q6.
A control signal is derived for driving the driving means 93 which drives the 3.14.

This driving means 93 receives II? from the output terminal Ql. It includes a servo valve 94 to which a control signal is applied, a flag operating device 95 that generates power for the servo valve 94, and a link device 96 that transmits the power of the flap operating device 295 to the forward flaps 13 and 14. *The output of the flap actuating device 95 in the actuating means 93 is given to the main position dual changer 97, detected and sent from the output terminal Ql to the control signal generating means 4.
1, forming a negative feedback system.

In this way, a drive system designated by the reference numeral 98 including the drive means 93 and the main position dual changer 97 is constructed. Drive systems 99 to 103 having a similar configuration are provided and these drive the port outer aft flap 21 . Port inner aft flap 2
0, are provided for the starboard external power aft flap 18, the starboard inner aft flag 19, and the forward strut used as a rudder, and output terminals Q8 to Q12 are respectively provided corresponding to the output terminal Ql. . In the embodiment shown in FIG.
The output terminals Q1 to Q12 are generally designated by the reference mark Qi.

An alternating current signal such as a sine wave is selectively input to these input terminals P1 to P13 from the line 45, and the resulting visll signal is derived from the output terminals Q1 to Q12, and the gain and phase difference are measured as described above. do.

Yet another control signal generating means 4! Control circuits C1 to C
6 input terminals P14 to P19 and output terminals Q13 to Q
18 signals to measure gain and phase difference.
The test may be performed using this method.

The overall structure of the hydrofoil boat having the structure shown in FIG. 6 will be described with reference to FIGS. 7 to 10.

FIG. 7 is a simplified perspective view of one embodiment of the present invention;
FIG. 8 is a side view thereof, and FIG. 9 is a bottom view thereof. With reference to these drawings, the bow 2 of the hull 1 of the underwater G-ship
A forward strut 3 is provided. This forward strut 3 is angularly displaceable about a vertical axis 4 and can thereby be steered, and is sometimes referred to as a strut or rudder. A wing 5 of the bow 2 is provided at the bottom of the forward strut 3.

A pair of aft struts 7.8 are provided at the stern 6 of ship #1, and a stern wing 9 is provided extending between these aft struts 7.8. aft strut 7.8
A gas turbine water injection propulsion device 10 is located in the center between the two.
is provided, which allows the hull 1 to move forward (Figs. 7 to 9).
It is also possible to drive forward to the right as shown in the figure, and also to change the direction of the water jet and move backward. The forward flaps 13, 14 and out flaps 18-21 are primarily used to control the hull 1 around the pitch axis Y and the roll axis X, and in combination with the forward struts 3. It is also possible to tilt the hull 1 about its roll axis X during a turn. Furthermore, the hull 1 may also move about a yaw axis Z.

FIG. 10 is an enlarged perspective view showing the vicinity of X5 and X9. At the bottom of the forward strut 3, a forward foil 11.12 projects and extends from side to side, and behind this forward foil 11.12, a forward flag 13 is installed.
．． 14 is supported.

These forward flaps 13, 14 are interconnected and operate synchronously, so that it can be said that there is only one flap in the bow 2.

As mentioned above, the aft strut 7.8 is provided at the stern 6 and projects downward. True 9 has left and right aft foils 16 extending between these aft struts 7.8.
．． 17 and these? Two pairs of aft flaps 1819; 20, 21 are supported by the position. The pair of aft flags 18, 19 located aft of the starboard aft foil 16 can be operated synchronously, but also independently. The pair of aft flaps 20.21 arranged aft of the port aft foil 17 can also be operated synchronously or individually.

The gas turbine water propulsion system 10 installed in the hull 1 between the aft struts 7 and 8 has a propulsion gang 22 that sprays water rearward on the starboard and port sides.
, 23, a nozzle 25 having an inlet 24 through which water such as seawater is commonly drawn and supplied to these pumps 22, 23, and a gas turbine 2 that drives the pumps 22, 23.
6.27 and the output shaft 28 of the turbine 26+27.
From 29, pump 22.
Power is transmitted to 23 to drive pumps 22 and 23.

The oscillation frequency of the sine wave generation circuit 43 is manually set by the setting circuit 4.
1, the setting circuit 44 may be used to continuously change the frequency and sweep it, or alternatively, a signal having a random frequency may be used and extracted by FFT to change the frequency. You may also do so. An alternating current signal other than a sine wave may be used.

Effects of the Invention As described above, according to the present invention, an alternating current signal is given as an input signal to the control signal generating means that generates the control signal applied to the means for driving the blades, and based on the control signal,
By measuring the gain of the control signal generation means or the phase of the control signal, we can check the dynamic characteristics, that is, the frequency characteristics, of the control signal generation means, and thereby dramatically improve the reliability of the underwater R-ship. can be improved.

Furthermore, according to the present invention, the gain of the control signal generating means or the phase of the control signal obtained from the control signal generating means is measured by a gain meter or a phase difference meter, and compared with a predetermined gain or phase difference and subtracted. The test can be advantageously carried out and the control can be carried out by determining the difference between the two and observing whether the pointer of the indicator is located corresponding to the allowable gain or phase difference range of the display board. It is possible to know the degree of abnormality in the signal generating means.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the electrical configuration of an embodiment of the present invention, FIG. 2 is a waveform diagram of the signal led out from the sine wave generating circuit 43 to line 45, and FIG. 3 is a waveform diagram of the signal led out to line 46. FIG. 4 is a graph for explaining the step response of the control signal generating means 41, FIG. 5 is a graph showing the frequency characteristics, that is, dynamic characteristics, of the control signal generating means 41, and FIG. 6 is a graph showing the dynamic characteristics of the control signal generating means 41. a block diagram illustrating an electrical tlI command of a hydrofoil in conjunction with which an embodiment of the invention may be implemented;
FIG. 7 is a simplified perspective view of a hydrofoil boat according to an embodiment of the present invention, FIG. 8 is a side view of the hydrofoil boat, FIG. 9 is a bottom view of the hydrofoil boat, and FIG. 10 is a g5 , 9 is an enlarged perspective view showing a configuration related to the components.

Claims (3)

[Claims] (1) wings provided at the bow and stern; control signal generating means for generating a control signal for driving the wings in response to an input signal; and in response to a control signal from the control signal generating means, In a test method for a hydrofoil boat having means for driving wings, an alternating current signal is used as an input signal, and the gain of the control signal generating means or the phase difference of the control signal is measured based on the control signal from the control signal generating means. A test method for a hydrofoil boat, which is characterized by: (2) wings provided at the bow and stern; control signal generating means for generating a control signal for driving the wings in response to an input signal; and in response to a control signal from the control signal generating means, A hydrofoil testing device comprising means for driving a wing, comprising: an AC signal generation circuit that generates an AC signal and provides it as the input signal; and a control signal generation means in response to a control signal from the control signal generation means. a gain meter that measures the gain of the gain meter, a comparison signal generation circuit that derives a signal representing a predetermined gain, a subtraction circuit that calculates the difference between the outputs of the gain meter and the comparison signal generation circuit, and a pointer that makes an angular displacement. In response to the output of the subtraction circuit, the pointer is angularly displaced by the corresponding angular displacement amount, and the display board has a display board indicating the range of angular displacement of the pointer. A testing device for a hydrofoil boat, comprising: an indicator in which a corresponding range of angular displacement of a pointer is displayed. (3) wings provided at the bow and stern; control signal generating means for generating a control signal for driving the wings in response to an input signal; and in response to a control signal from the control signal generating means, A testing device for a hydrofoil boat, comprising: an AC signal generation circuit that generates an AC signal and provides it as the input signal; and a control signal generation circuit that responds to a control signal from the AC signal generation means. A phase difference meter that measures the phase difference of control signals from the phase difference meter, a comparison signal generation circuit that derives a signal representing a predetermined phase difference, and a subtraction circuit that calculates the difference between each output of the phase difference meter and the comparison signal generation circuit. and a pointer that is angularly displaced, and a display board that indicates the range in which the pointer is angularly displaced, and in response to the output of the subtraction circuit, the pointer is angularly displaced by the corresponding angular displacement amount, and the display board shows and an indicator in which a range of angular displacement of the pointer is displayed in correspondence with a range of allowable phase difference.