KR19990039249A - Test box of radar servo drive - Google Patents

Abstract

The present invention discloses a test box for testing a radar servo drive. The test box of the servo drive system in the radar system according to the present invention includes a cable which receives the servo power voltage from the servo power supply of the radar system and is connected to each test point of the servo drive device; A test voltage generation unit configured to select and input the positive and negative voltages of the power introduced through the cable to generate respective test voltages, and to select and output corresponding test voltages; A relay power terminal unit for supplying power from the servo driver to provide a relay driving power; A loop control switch unit connected to a loop relay at a test point in the servo drive device and for interrupting or shorting the relay drive power to selectively turn on or off the corresponding loop; And a test voltage input terminal unit for outputting to a corresponding test point of the servo drive device through a jumper wire connected to the output terminal of the test voltage generation unit.

As described above, according to the present invention, there is no need for a separate power supply, thereby reducing the cost of the measuring instrument and reducing the test time. In addition, by applying a voltage to the variable voltage knob to prevent damage to the equipment due to the step applied voltage rising or falling.

Description

Test box of radar servo drive

The present invention relates to a test box of a servo drive device in a radar system, and more particularly, to a test box that can be tested more quickly without a separate power supply from the outside.

The servo drive is essential for the tracking radar to track the target in the radar system, and the current position of the tracking radar turret and the position of the target is When the position information is compared and the difference value is input to the servo drive, the input voltage drives the servo drive consisting of a current loop, tacho loop, and position loop to direct the radar turret toward the target direction. .

In order to test such a servo drive, an extension box for connecting a power supply of an external power supply to a radar servo drive and applying a signal power through a relay has been used.

First, a schematic block diagram showing each test loop in the servo drive of the general radar system shown in FIG. 1 will be described. The motor 19, the tacho generator 11, the reduction gear 25, and the synchronization The synchro transmitter 24 is connected and connected, and the synchronous transmitter 24 injects 115 volts of 400 Hz, which is a synchronous voltage, and outputs information according to a radar turret position not shown. The synchronous digital conversion unit 23 converts the current position information into a digital signal and outputs it to the radar control computer 22. The radar control computer 22 outputs the difference between the current position information signal and the input target instruction signal to the position loop control unit 12 as an analog signal through the D / A converter 21. You can also use the joystick to manually adjust the radar turret. The position loop control unit 12 controls the position loop by changing the relay contact by the relay driving voltage. The position control signal through the position loop control unit 12 is output to the first adder 14 through the speed limiter 13. On the other hand, the negative speed signal of the radar turret output from the taco generator 11 by the rotation of the radar turret is output to the first adder 14 through the taco loop control unit 10. The first adder 14 adds the introduced signal to output the speed control signal, and the motor through the second adder 17 and the motor driver 18 through the speed adjusting unit 15 and the acceleration limiter 16. Drive 19. At this time, the negative signal fed back from the motor 19 is output to the second adder 17 through the current loop control unit 20.

Figure 2 is a connection diagram for explaining the expansion box of the conventional servo drive.

In general, it is the most important item to check the current loop, taco loop, position loop and measure the maximum speed and acceleration among the items of servo test that must be performed first after assembling radar system. In order to test these items, an expansion box 26 and a graphic recorder 29 connected to the input / output points for testing the external power supply 27 and the servo drive 28 must be prepared. (28) Find the signals of each pin of connector and connect them.

First, in order to check the current loop, + 28V is applied to the current loop control unit 20 of FIG. 1 to open the current loop. That is, + 28V is applied to the relay connected to the current loop feedback to open the contact to cut off the current feedback. Input a small voltage (+ 0.3V) to the current loop input and verify that the radar turret moves upward to check the elevation servo drive and also clockwise to check the azimuth servo drive. Input a small voltage (-0.3V) to the input terminal of the current loop control unit 20 and check whether the radar turret moves in the downward or counterclockwise direction. In addition, while increasing the input voltage to + 0.2V step, it is confirmed whether the radar turret moves normally and noise occurs in the feedback signal recorded by the graphic recorder.

To check the taco loop, + 28V is applied to the relay of the taco loop control unit 10, the input voltage is connected to the input terminal of the taco loop control unit 10, and the taco feedback signal is connected to the graphic recorder 29. It is tested in the same way as the current loop.

The position loop check applies + 28V to the position loop control unit 12 and the input voltage is applied to the position loop input terminal. Here, the graphic recorder 29 does not connect and observes only the movement of the radar turret.

The maximum speed and acceleration measurement of the radar turret are the same as the taco loop check and connection.The input voltage is applied as ± 5.1V and the taco feedback signal is recorded by the graphic recorder 29, and from the taco feedback signal recorded by the graphic recorder. Maximum velocity and acceleration are measured.

As a test apparatus of the conventional servo drive device, it is inconvenient to use an external power supply to measure the current loop and taco loop, the position loop check, and the maximum speed and the maximum acceleration. In addition, when applying + 28V power in the expansion box 26 and applying the input and feedback signals of each loop, the tester must always know the corresponding pin number, and the test must be done by finding the pin number and connecting them to each other. There was also a problem that takes a long time.

The present invention was created to solve the above-mentioned problems, and does not require a separate external power supply by using the power supplied to the servo drive in the radar system, and can further reduce the test time of the radar servo drive device. The purpose is to provide a test box.

1 is a schematic block diagram showing each test loop in a servo drive of a general radar system.

Figure 2 is a connection diagram for explaining the expansion box of the conventional radar servo drive.

3 is an external view showing a test box of the servo drive device according to the present invention.

4 is an internal configuration diagram of a test box of the servo drive shown in FIG. 3.

5 is a connection diagram for testing a servo drive using the test box shown in FIG.

* Explanation of symbols for main parts of the drawings

31: first cable connector, 32: second cable connector

33: test voltage generation unit, 34: relay power terminal

35: loop control switch part, 36: position loop input terminal

37: Taco loop input terminal, 38: Taco feedback terminal

39: current loop input terminal, 40: current feedback terminal

The test box for testing the current loop and taco loop, the position loop and the maximum speed and the maximum acceleration of the radar servo drive device according to the present invention for achieving the above object, the servo power supply voltage from the servo power supply of the radar system A cable connected to each test point of the servo drive device; A test voltage generation unit configured to select and input the positive and negative voltages of the power introduced through the cable to generate respective test voltages, and to select and output corresponding test voltages; A relay power terminal unit for supplying power from the servo driver to provide a relay driving power; A loop control switch unit connected to a loop relay at a test point in the servo drive device and for interrupting or shorting the relay drive power to selectively turn on or off the corresponding loop; And a test voltage input terminal unit for outputting to a corresponding test point of the servo drive device through a jumper wire connected to the output terminal of the test voltage generation unit.

The test voltage generator may include a capacitor configured to remove an AC component included in the servo power voltage introduced through the cable; A plurality of zener diodes connected in parallel with the capacitor and outputting corresponding test voltages with negative and positive voltages; A switch unit for selecting a negative voltage and a positive voltage of the servo power and an output voltage of the zener diode; And a variable resistor provided between the output voltage of the zener diode and ground to manually adjust the test voltage.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

Figure 3 is an external view showing a test box of the servo drive device according to the present invention, Figure 4 shows the internal configuration of Figure 3, wherein the terminal is indicated by the alphabet in the test box of Figure 3 the same front panel It is connected corresponding to the terminal of. In addition, Figure 5 is a connection diagram for testing the servo drive using the test box shown in FIG.

The test box 51 of the radar servo drive device is connected to the servo power supply 54 used for the servo drive device of the radar system without using a separate power supply, and is used with the elevation or azimuth servo drive device 52. The graphic recorder 53 can be simply used by being connected to a connector without connecting each corresponding pin.

The first cable connector P1 31 is interfaced with the elevation or azimuth servo drive device, and the second cable connector P2 32 is interfaced with the servo power supply 54, respectively. The test voltage generation unit 33 flows ± 30V from the servo voltage supply to generate a test voltage of ± 5.1V and ± 1.02V and a variable voltage. The + 28V terminal 34, which is a relay power supply terminal, receives + 28V from the servo drive. The loop control switch unit 35 cuts off or short-circuits the relay drive power supply (+ 28V) to selectively turn on or off the loop of the test point in the servo drive device at each loop check, and performs the loop test for the loop test. The loop is opened by breaking the feedback signal of the loop. The position loop, taco loop, and current loop input terminals 36, 37, and 39, which constitute the test voltage input unit, are connected to the output terminal 337 of the test voltage generator 33 by a jumper wire to supply test power to each corresponding loop. Supply. The taco feedback terminal 38 and the current feedback terminal 40 are connected to the graphic recorder 53 so that the tester can check the normal operation of the loop.

+ 30V and -30V are supplied through the cable connectors 31 and 32 from the servo power supply 54 of the radar system. The switches SW1 and SW2 correspond to the + 30V IN and -30V IN switches 331 and 332 of the test voltage generator 33 on the front panel of the servo drive test box, and the + 30V IN switch 332 is turned on. + 30V flows from the servo power supply 54. The capacitors 41 to 44 bypass the AC component flowing from the servo power supply 54. Zener diodes 45 and 46 are connected in parallel to capacitors 41 to 44 to clamp a ± 30V direct current voltage to ± 5.1V, and are also connected to a resistor to produce ± 1.02V. ± 5.1V and ± 1.02V output are selected and applied to the switch (SW5) according to the switch (SW3, SW4) corresponding to the positive and negative 1.02V and 5.1V switching switches (334, 335) on the front panel of the test box. do.

The switch SW5 is a POSIT and NEGAT switch 335 which selects outputs of positive and negative voltages, and the variable output voltage is adjusted according to the adjustment of the voltage variable knob 336 connected to the 10KΩ variable resistor 47 connected to the ground. It is output to the output terminal 337 of this test box.

In the current loop inspection using the test box of the servo drive device according to the present invention, the current loop control switch 353 is simply applied to the current loop by a tester directly applying a + 28V power supply line, which is a relay drive voltage, in a conventional expansion box. When is turned on, + 28V is applied to the servo drive to open the current loop. Connect the terminal of the current loop input part 39 of the test box and the current feedback terminal 40 to the graphic recorder 53, and switch + 30V to + 30V IN, + 1.02V, and POSIT from the test box (331, 333, 335). ), Adjust the voltage variable knob 336 so that + 0.3V is output from the output terminal 337, and connect the output terminal 337 and the current loop input terminal 39 by using jumper wires. Supply 0.3V. To supply -0.3V, turn on the -30V IN switch 331 in the test box, switch each switch 334 and 335 to -1.02V, NEGAT, and turn the voltage variable knob 336 to -0.3V. Adjust to output.

Checking the taco loop is performed in the same manner as the current loop check after turning on the taco loop control switch 352 described above, and merely outputs the output terminal 337 to the taco loop input terminal 37 and the taco feedback terminal 38. Check the wiring. The position loop check is also carried out in the same manner as the current loop check, except that the output terminal 337 is connected to the position loop input terminal 36, and the graphic recorder 53 is not used at this time.

The maximum speed and maximum acceleration tests are made in the same way as the taco loop check described above, and the + 5.1V supplied to the conventional power supply is converted and supplied from the test box at + 30V. At each loop check, turn the voltage-variable knob 336 to the minimum voltage position, switch the switches 331, 333 to + 30V IN and + 5.1V, POSIT, and use the jumper wires to output terminal 337 and taco loop input. At the same time as the terminal 37 is connected, the voltage variable knob 336 is turned to the maximum voltage (+ 5.1V) position and the voltage variable knob 336 is turned to the minimum voltage position for testing. As a result, a stepped voltage is inputted by adjusting the voltage variable knob 336 without applying a step voltage rising and falling as in the related art, thereby eliminating the possibility of damaging the servo drive by the input voltage. The -5.1V power supply switches the switches 332, 334 and 335 of the loop input voltage generator 33 of the test box to -30V IN, -5.1V, NEGAT, and connects the jumper wires as described above. The variable knob 336 can be adjusted to measure the maximum velocity and maximum acceleration relative to the reverse direction of the radar turret.

As described above, the test box of the radar servo drive device according to the present invention generates the respective test voltages by introducing the power supply of the radar system, thereby eliminating the need for a separate power supply, thereby reducing the cost of the instrument and connecting to various signals. Terminals are formed on the front panel of the servo drive test box to reduce the test time. In addition, by applying a voltage to the variable knob during the measurement of the maximum speed and the maximum acceleration to prevent damage to the equipment due to the step applied voltage rising or falling.

Claims (2)

In the test box for testing the current loop, taco loop, position loop, and maximum speed and maximum acceleration of the radar servo drive, A cable which receives the servo power voltage from the servo power supply of the radar system and is connected to each test point of the servo drive device; A test voltage generation unit configured to select and input the positive and negative voltages of the power introduced through the cable to generate respective test voltages, and to select and output corresponding test voltages; A relay power terminal unit for supplying power from the servo driver to provide a relay driving power; A loop control switch unit connected to a loop relay at a test point in the servo drive device and for interrupting or shorting the relay drive power to selectively turn on or off the corresponding loop; And And a test voltage input terminal section for outputting to a corresponding test point of the servo drive system through a jumper wire connected to the output terminal of the test voltage generation section. The method of claim 1, The test voltage generation unit is a capacitor for removing the AC component included in the servo power voltage introduced through the cable; A plurality of zener diodes connected in parallel with the capacitor and outputting corresponding test voltages with negative and positive voltages; A switch unit for selecting a negative voltage and a positive voltage of the servo power and an output voltage of the zener diode; And And a variable resistor provided between the output voltage of the zener diode and ground to manually adjust the test voltage.