JP2533941B2 - Hydrofoil test equipment - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to an apparatus for testing hydrofoil vessels having stern and bow wings.

2. Description of the Related Art Conventionally, in order to test whether or not the control signal generating means for driving the wings or the like provided in such a hydrofoil ship operates normally, a DC voltage is applied as a simulation signal. The output of the control circuit that controls the wings, etc. is measured, and the hydrofoil ship is tested in this manner.

Problems to be Solved by the Invention In such a prior art, a DC voltage is input to the control signal generating means to perform a simulated operation. Therefore, since only the static DC gain of the control signal generating means can be checked, it is not possible to carry out the same test as in actual wing flight, which means that the testable range is limited. It was

It is an object of the present invention to provide a hydrofoil tester capable of checking dynamic characteristics such as when the hydrofoil is in flight.

Means for Solving the Problems The present invention provides a wing provided on a bow and a stern, a control signal generating means for generating a control signal for driving the wing in response to an input signal, and a control signal generating means. In a test apparatus for a hydrofoil having a means for driving a wing in response to the control signal of, an AC signal generating circuit for generating an AC signal and giving it as the input signal, and a control signal from the control signal generating means. In response, a gain meter that measures the gain of the control signal generating means, a comparison signal generation circuit that derives a signal that represents a predetermined gain, and a subtraction circuit that calculates the difference between the outputs of the gain meter and the comparison signal generation circuit. And a pointer for angular displacement and a display plate showing the range of angular displacement of the pointer. In response to the output of the subtraction circuit, the pointer is angularly displaced by the corresponding angular displacement amount, and The range of allowable gains A test device of hydrofoils which comprises a indicator that range angular displacement of the pointer corresponds is displayed.

Further, the present invention provides a wing provided on the bow and stern, a control signal generating means for generating a control signal for driving the wing in response to an input signal, and a control signal for responding to the control signal from the control signal generating means. In a test apparatus for a hydrofoil having a means for driving a wing, an AC signal generating circuit for generating an AC signal and giving it as the input signal, and a control signal in response to a control signal from the AC signal generating means. A phase difference meter for measuring the phase difference of the control signal from the generating means, a comparison signal generation circuit for deriving a signal representing a predetermined phase difference, and a difference between the outputs of the phase difference meter and the comparison signal generation circuit. It has a subtraction circuit, a pointer for angular displacement, and a signal plate indicating the range in which the pointer is angularly displaced. In response to the output of the subtraction circuit, the pointer is angularly displaced by the corresponding angular displacement amount, and the display board Of the allowable phase difference A hydrofoil tester, comprising: an indicator displaying a range of angular displacement of a pointer corresponding to the range.

Operation According to the present invention, the control signal generating means for generating the control signal for driving the blade in response to the input signal and giving it to the driving means uses the AC signal as the input signal. Then, the gain of the control signal generating means or the phase difference between the control signals during the actual wing running can be measured, and the dynamic characteristics can be checked in this manner.

Further, 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, and the difference is obtained by a subtraction circuit, When this difference is within the allowable gain range of the display plate indicated by the pointer of the indicator, it can be determined that the control signal generating means operates normally. By checking the phase difference of the control signals from the control signal generating means, the hydrofoil vessel can be tested in the same manner.

The frequency of the AC signal can be changed by sweeping manually or also automatically, or the AC signal can be changed by using an FFT (Fast Fourier Transform) to change the extracted frequency. .

Embodiment FIG. 1 is an overall block diagram of an embodiment of the present invention. The control signal generating means 41 of the present hydrofoil has an input terminal Pi and an output terminal Qi, and in response to the input signal given to the input terminal Pi, the control circuit Ci included in the control signal generating means 41 is The control signal is led 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 thereof, and the sine wave of the frequency set by the setting circuit 44 is a line. It is led to 45 and given to the input terminal Pi. The waveform of the sine wave, which is the AC signal derived on the line 45, is as shown in FIG. 2, the amplitude is vi, and the phase is deviated from the predetermined value by θi. V1 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 generating circuit 41, the output waveform V2 shown in FIG. 3 is derived at the output terminal Qi.

V2 = v0.sin ([omega] t- [theta] o) (2) where v0 is the amplitude of the control signal derived from the output terminal Qi to the line 46, and [theta] o is the phase difference from the reference value.

The outputs from the lines 45 and 46 are supplied to a gain meter 47, respectively, and a DC voltage representing the gain of the control circuit Ci is derived from the line 48. The voltage V3 on the line 48 is as shown in the third equation.

The comparison signal generation means 50 includes a first comparison signal generation circuit 51,
And a second comparison signal generation circuit 52. The subtraction circuit 53 has
A predetermined DC voltage is applied from the first comparison signal generating circuit 51 via the line 54. The output voltage V4 of the subtraction circuit 53 is
This is as shown in the fourth formula.

Here, the DC voltage value derived from the first comparison signal generation circuit 51 via the line 54 is VRG.

The output voltage V4 of the subtraction circuit 53 is amplified by the amplification circuit 55 and displayed by the indicator 56, which is a DC voltmeter. The indicator 56 has a pointer 58 that is angularly displaced about an axis 57, and a display plate 59 provided behind the pointer 58. The pointer 58 is angularly displaced by an amount of angular displacement proportional to the output voltage of the amplifier circuit 55. On the display board 59, the range of allowable gain is displayed as indicated by reference numeral 60, and the range in which the pointer 58 is located when the control circuit Ci should be judged to be defective is indicated by reference numerals 61, 62. Displayed as shown. Therefore, it can be judged that the control circuit Ci operates normally when the pointer 53 is in the allowable gain range 60, and when the pointer 53 is in the other ranges 61 and 62, the control circuit Ci is out of order due to a failure or the like. It can be judged that there is. Further, by looking at the angular displacement position of the pointer 58, the degree of abnormality of the control circuit Ci can be known.

Sine wave on line 45 and control circuit on line 46
The output of Ci is given to the phase difference meter 63, and the DC voltage V5 representing the phase difference (θo−θi) is derived to the line 64.

V5 = k1 · (θo−θi) (5) where k1 is a constant. Phase difference meter 63 via line 64
Is output to the subtraction circuit 65. The subtraction circuit 65 has
A predetermined direct-current voltage VRP is applied from the second comparison signal generating circuit 52 of the comparison signal generating means 50 via a line 66. Subtractor circuit 65 derives voltage V6 on line 67.

V6 = V5−VRP = k1 · (θo−θi) −VRP (6) The signal from the subtraction circuit 65 via the line 67 is an amplification circuit 68.
To the indicator 69 which is a DC voltmeter. The indicator 69 has a structure similar to that of the indicator 56 described above, and includes a pointer 71 that is angularly displaced around the axis 70, and the pointer 71.
And a display plate 72 provided behind. On the display plate 72, the range of allowable phase difference is displayed as indicated by the reference numeral 73, and the range indicating an abnormality such as a failure
74,75 are displayed.

In this way, by checking the dynamic characteristics of the control circuit Ci, that is, the frequency characteristics, the test of the hydrofoil can be conducted.

Referring to FIG. 4, generally, when the 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. The output waveform 76 or 77 which is the control signal shown in FIG. 4B is derived from the output terminal Qi. In the prior art, since a direct current signal is applied to the input signal Pi, only the output voltage after the output waveform shown by reference numeral 79 in FIG. 4 (2) is stable, that is, the direct current gain is checked. It is not possible to know whether the step response waveform is reference numeral 76 or 77.

In hydrofoil vessels, flaps 13, 14; 18 to 21 (see Fig. 10 to be described later) that are wings provided on the bow and stern are driven by a control signal derived from output terminal Qi. . At this time, the hull 1 is driven when the flap is driven in response to the waveform 76 and when it is driven in response to the waveform 77.
Behaves completely differently. When expecting the movement of the flap as the waveform 77, the output of the control circuit Ci should not be the waveform 76. That is, it is necessary to test whether the output waveform of the control circuit Ci is 76 or 77 in FIG. 4 (2).
Whether the output waveform of the control circuit Ci is the waveform 76 or the waveform 77 of FIG. 4B, that is, the waveform of the step response is the frequency characteristic of the control circuit Ci, the gain when the frequency is changed, and It is generally known that it is determined by the change in phase delay. In the present invention, an AC signal such as a sine wave is input to the input terminal Pi, the frequency is changed, and the dynamic characteristic which is such a frequency characteristic is measured to obtain the dynamic characteristic as shown in FIG. It is possible to test the dynamic characteristics of the control circuit Ci having

FIG. 6 is a block diagram showing the electrical configuration of the hydrofoil. At the input terminals P1 to P13 of the control signal generating means 41, an accelerometer 81 provided on the bow for detecting acceleration in the vertical direction, that is, vertical direction, and pitch outputs 83 and 2 detected by a vertical gyro 82 are provided. Rolling output 84, output of accelerometer 85 for detecting vertical acceleration on stern port and accelerometer for detecting vertical acceleration provided on stern starboard.
The output of 86, the output of a gyro 87 that detects the yaw rate and the output of an altitude sensing device 88 that detects the altitude that is the height of the sea surface, and the accelerometer 89 that is installed on the bow to detect lateral acceleration. Of the steering wheel 90, the output of the depth command signal generating circuit 91 of the hull corresponding to each output of the steering wheel 90, and the output of the course holding circuit 92.

The control signal generation means 41 is provided with control circuits C1 to C6. A control circuit C1 provided in the control signal generating means 41 in response to each signal given from the input terminals P1 to P13.
Control signals are generated by C6 to C6, and control signals for driving the driving means 93 for driving the off-word flaps 13 and 14 are derived from the output terminals Q1 to Q6. This drive means 93
A servo valve 94 to which a control signal from the output terminal Q1 is given,
A flap actuator 95 that generates power for the servo valve 94.
And a link device 96 for transmitting the power of the flap actuator 95 to the forward flaps 13, 14. Drive means 93
The output of the flap actuator 95 at
Control signal generating means from the output terminal Q7
Given to 41, the negative feedback system is formed. In this way, a drive system indicated by reference numeral 98 including the drive means 93 and the main position converter 97 is constructed. Drive systems 99-103 having a similar structure are provided, and these are the port-side outer aft flap 21, the port-side inner aft flap 20, the starboard outer-side aft flap 18, and the starboard inner-side aft flap.
19 and a forward strut used as a rudder, respectively, and output terminals Q8 to Q12 are provided respectively corresponding to the output terminal Q7. In the above-described embodiment shown in FIG. 1, these input terminals P1 to P13 are indicated generally by the reference numeral Pi, and the output terminals Q1 to Q12 are generally indicated by the reference numeral Qi.

An AC signal such as a sine wave is selectively input to the input terminals P1 to P13 from the line 45, and the control signal obtained by this is derived from the output terminals Q1 to Q12 to obtain the gain and phase difference as described above. To measure.

Furthermore, in the control signal generating means 41, the gain and the phase difference are measured by the signals of the input terminals P14 to P19 and the output terminals Q13 to Q18 of the control circuits C1 to C6, so that the test is performed. May be.

Regarding the hydrofoil having the configuration shown in FIG.
The overall configuration will be described with reference to FIGS.

FIG. 7 is a simplified perspective view of an 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, a forward strut 3 is provided on a bow 2 of a hull 1 of a hydrofoil. The forward strut 3 is angularly displaceable about a vertical axis 4 and can be steered by it, sometimes referred to as a strut or rudder. Wings 5 of the bow 2 are provided below the forward strut 3.

A stern 6 of the hull 1 is provided with a pair of aft struts 7,8, and a stern wing 9 is provided between the aft struts 7,8. A gas turbine water injection propulsion device 10 is provided at a central position between the aft strut 7 and 8, whereby the hull 1 is forwardly driven to the right in the forward direction (Figs. 7 to 9). Change the direction of the water jet,
It is also possible to go backwards. Forward flap 1
Using mainly 3,14 and outflaps 18-21,
The hull 1 is controlled about a pitch axis Y and a roll axis X, and is also used in combination with a forward strut 3 to move the hull 1 into its roll axis X during turning.
It is also possible to tilt it around. Hull 1
May move about the yaw axis Z.

FIG. 10 is an enlarged perspective view showing the vicinity of the wings 5 and 9.
At the lower part of the forward strap 3, forward oils 11 and 12 protrude to the left and right, and forward wraps 13 and 14 are supported behind the forward oils 11 and 12. These forward flaps 13, 14 are interconnected and operate synchronously, so that it can be said that the bow 2 has a single flap.

As described above, the aft strates 7 and 8 are provided on the stern 6 so as to project downward. The wings 9 comprise left and right aft oils 16, 17 extending between these aft struts 7, 8
And two pairs of aft flaps 18, 19; 20, 21 supported behind them. Aftoff oil on starboard 1
The pair of aft flaps 18, 19 arranged behind the 6 can be operated synchronously, but can also be operated individually. The pair of aft flaps 20, 21 arranged behind the port side aft oil 17 can also be operated synchronously or individually.

Between the aft struts 7 and 8, the gas turbine blast water propulsion device 10 mounted on the hull 1 includes propulsion pumps 22 and 23 that blast the blast water toward the starboard side and the port side toward the rear.
A nozzle 25 having a suction port 24 through which water such as seawater is commonly sucked and supplied to these pumps 22 and 23;
Turbine including gas turbines 26,27 driving 22,23
Power is transmitted from the output shafts 28, 29 of the 26, 27 to the pumps 22, 23 via the speed reducers 30, 31, and the pumps 22, 23 are driven.

Although the oscillation frequency of the sine wave generation circuit 43 may be manually set by the setting circuit 44, the frequency may be continuously changed and swept by the setting circuit 44, or alternatively A signal having a random frequency may be used and extracted by the FFT to change the frequency. An AC signal other than a sine wave may be used.

As described above, according to the present invention, the control signal generating means for generating the control signal to be applied to the means for driving the blade is provided with an AC signal as an input signal, and based on the control signal,
Since the gain of the control signal generating means is measured or the phase of the control signal is also measured, the dynamic characteristic of the control signal generating means, that is, the frequency characteristic is checked, thereby improving the reliability of the hydrofoil. It can be dramatically 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, respectively, and compared with a predetermined gain or phase difference. The test can be advantageously carried out by subtracting to find the difference and seeing if this difference lies in the range of the allowable gain or phase difference of the indicator board. In addition, it is possible to know the degree of abnormality of the control signal generating means.

[Brief description of drawings]

FIG. 1 is a block diagram showing an electrical configuration of an embodiment of the present invention, FIG. 2 is a waveform diagram of a signal derived from the sine wave generating circuit 43 to a line 45, and FIG. 3 is derived to a line 46. FIG. 4 is a waveform diagram of the signal, FIG. 4 is a graph for explaining the step response of the control signal generating means 41, and FIG. 5 is the control signal generating means.
FIG. 6 is a block diagram showing the electrical configuration of a hydrofoil ship which can be implemented in connection with an embodiment of the present invention. FIG. 7 is a graph showing the frequency characteristic of 41, that is, the dynamic characteristic. FIG. 8 is a side view of the hydrofoil, and FIG. 9 is a bottom view of the hydrofoil.
FIG. 10 is an enlarged perspective view showing a configuration related to the wings 5 and 9. 1 Hull 2 Bow 3 Strut forward strut 5, 9 Wings 6 Stern 7 8 Aft strut 10 Gas turbine jet water propulsion device 11 12 ……
Forward oil, 13,14 …… Forward flap, 1
6,17 …… Aftov oil, 18,19; 20,21 …… Aft flap, 22,23 …… Propulsion pump, 26,27 …… Gas turbine, 41 …… Control signal generating means, 42 …… AC signal generating circuit , 43 …… Sine wave generator, 44 …… Frequency setting circuit, 47
...... Gain meter, 50 …… Comparison signal generation means, 51 …… First comparison signal generation circuit, 52 …… Second comparison signal generation circuit, 53,65 ...
… Subtraction circuit, 63 …… Phase difference meter, 56, 69 …… Indicator, 58, 71
...... Pointer, 59,72 …… Display board, 60,73 …… Allowable range, 61,6
2,74,75 ... Abnormal range

Claims (2)

(57) [Claims] 1. A wing provided on the bow and stern, control signal generating means for generating a control signal for driving the wing in response to an input signal, and responsive to a control signal from the control signal generating means. In a test apparatus for a hydrofoil having a means for driving the wing, an AC signal generating circuit for generating an AC signal and giving it as the input signal, and a control signal in response to the control signal from the control signal generating means. A gain meter for measuring the gain of the generating means, a comparison signal generation circuit for deriving a signal representing a predetermined gain, a subtraction circuit for calculating the difference between the outputs of the gain meter and the comparison signal generation circuit, and a guide for angular displacement. And a display plate showing the range in which the pointer is angularly displaced. In response to the output of the subtraction circuit, the pointer is angularly displaced by the corresponding angular displacement amount, and the display plate shows the allowable gain. Depending on the range, change the angular displacement of the pointer. A test device for a hydrofoil, including an indicator displaying a range to be displayed. 2. A wing provided at the bow and stern, control signal generating means for generating a control signal for driving the wing in response to an input signal, and responsive to a control signal from the control signal generating means. In a test apparatus for a hydrofoil having a means for driving a wing, an AC signal generating circuit for generating an AC signal and giving it as the input signal, and a control signal in response to a control signal from the AC signal generating means. A phase difference meter for measuring the phase difference of the control signal from the generating means, a comparison signal generation circuit for deriving a signal representing a predetermined phase difference, and a difference between the outputs of the phase difference meter and the comparison signal generation circuit. It has a subtraction circuit, a pointer for angular displacement, and a signal plate indicating the range in which the pointer is angularly displaced. In response to the output of the subtraction circuit, the pointer is angularly displaced by the corresponding angular displacement amount, and the display board Is the allowable phase difference range And an indicator displaying the range of angular displacement of the pointer corresponding to the above, and a hydrofoil tester.