JPH0245771Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a servo device for correcting a gyroscope using a common microsyn as a direction detector. An example of a well-known common microcin is the one shown in FIG. The stator 1 , which is formed by stacking magnetic materials in FIG. 1a, has four poles, poles 2, 3, 4, and 5. are wound in series in sequence. Its primary winding 7
The polarity is such that when the alternating voltage applied to the primary winding 7 is positive, the lines of magnetic force are wound from pole 3 to pole 5 and from pole 4 to pole 1. Further, the polarity of the secondary winding 8 is determined such that the sum of the currents generated in the secondary winding 8 of each pole by these lines of magnetic force becomes zero. FIG. 1b shows this state, where A indicates the primary input alternating voltage and B indicates the current generated at each pole of the secondary winding 8. When an alternating voltage is applied to the stator 1 through the primary winding 7, a magnetic field as described above is generated. When a rectangular rotor 6 made of soft iron as shown in FIG. 1A is rotated in this alternating magnetic field, magnetic imbalance occurs because of its non-uniform shape. Therefore, the magnetic resistance is the rotor 6
An output voltage is generated in the secondary winding 8. A curve P in FIG. 1c shows the change in output voltage that occurs when the rotor 6 is rotated 360 degrees clockwise. Rotor 6 is 45 degrees with 0 degrees as the starting position.
It shows zero voltage at angular positions of 135°, 225° and 315°. Therefore, an output voltage proportional to the rotation angle can be obtained before and after the position showing this zero voltage. In this way, the ordinary microsynth is used as an azimuth detector that can obtain an output voltage proportional to the rotation angle within a certain angular range. As a correction servo device for conventional gyroscope compasses, the second
As shown in Figure b, the direction detector 11 and the correction circuit 1
2. The servo amplifier 13, the servo motor 14, and the transmitter 15 are connected as shown in FIG. 2b to form a tracking control system, and the stator 16 of the direction detector 11 is connected as shown in FIG. is fixed to the direction tracking ring 17 of the gyro compass, and the rotor 18 of the direction detector 11 is directly connected to the compass card 19 at the center shaft 20.
Rotate. Gear 21 engages transmitter 15 .
Since the azimuth index indicated by the azimuth tracking stem 17 of the gyro alone includes a speed error, a speed error signal is set via the correction circuit 12, and the voltage indicated by this speed error signal is set to zero. The compass card 19 is made to follow the azimuth tracking ring 17 to obtain the true direction, and at the same time, remote instructions are given to each repeater via the transmitter 15. However, in the case of such a conventional correction servo device for a gyroscope compass, the microsynth as an azimuth detector is rotated at 45 degrees as shown in the example above when the rotor 6 is rotated at a 360 degree rotation position in a normal microsyn. At the and 225 degree positions, the output voltage both increases and reaches zero voltage. Therefore, since there are two tuning points for the servo operation in a 360 degree angular range, a situation may occur where the gyro compass is tuned at angular positions that differ by 180 degrees when it is started. In other words, there is a problem that the true orientation corrected by the correction servo device cannot be determined uniquely, and in the conventional device, the rotor 6
By using various compensation windings in which the shape of the primary winding 7 and the secondary winding 8 is devised and the polarity of the windings is devised, the output voltage can be reduced to 360° as shown by the curve Q in Figure 1c.
We had no choice but to create a special microsynth that can uniquely determine angles within a degree range. However, in the case of this special microsyn, a large amount of man-hours are required to manufacture the special shape of the rotor, and the stator becomes thicker in the axial direction due to the insertion of compensation windings, which hinders the small and thin feature. At the same time, it required a lot of man-hours and had the disadvantage that it was extremely expensive compared to ordinary Microsyn. The present invention was developed by focusing on these conventional drawbacks, and utilizes an ordinary microsynth that can be manufactured at low cost as a direction detector for a correction servo device of a gyro compass. A microswitch and a cam are provided in the directly connected rotating part, and a constant voltage is input to the servo amplifier during the operation period of the microswitch, thereby limiting the angle detection range of the microsyn and controlling the servo The purpose of this invention is to solve the above problems by setting the synchronization point of the operation to one point. According to the present invention, in a follow-up control system for correcting the speed error of a gyro compass consisting of an azimuth detector, a correction circuit, a servo amplifier, and a transmitter, a fixed device that is fixed to the azimuth follow-up ring of the gyro to hold a micro switch is used. A micro-synthesis device consisting of a rotor and a rotor that shares a central axis with the compass card and has a ring-shaped cam disposed in its rotating part that stops the operation of the micro-switch only in a partially cut-out angular range. type azimuth detector, and means for inputting a constant voltage to the servo amplifier during its operation period under the control of the microswitch, and the detection function of the microsyn type azimuth detector is controlled by the microswitch. It is possible to provide a correction servo device for a gyro compass, which is characterized in that the angle range is limited to the partially cut out angle range. Now, when the gyro compass is started, in the modified servo device of the present invention, the stator of the azimuth detector first rotates in a predetermined direction together with the azimuth tracking ring of the gyro, and the rotor of the azimuth detector moves to the tuning point. The compass card is rotated while detecting the direction so as to be held, and the compass card is rotated in a predetermined direction. At this time, a speed error signal is set in the correction circuit and input to the servo amplifier, so this deviation angle is further followed by the tuning action of the servo, the compass card further rotates toward the true direction, and the transmitter sends the signal to the true direction. The bearing is transmitted remotely to a repeater. During this process, if the initial position of the rotor of the orientation detector is significantly deviated from the tuning point of the servo operation, a micro switch on the stator is activated by a ring-shaped cam with a cut-out angle range of the rotor. When the micro switch reaches the notched angle range, the servo motor will drive and rotate the compass card, and the servo motor will drive the compass card. The drive of the compass card is stopped, the compass card stands still, and thereafter, the detection action of the azimuth detector, that is, the tuning action of the servo operation, is performed only within this angular range. When choosing the position of another tuning point of the direction detector at the position of this ring-shaped cam, it is possible to uniquely determine the tuning point within a 360 degree angle range. In this way, an ordinary microsyn, microswitch, and cam can be manufactured at low cost, and a relay controlled by the microswitch is used to supply a constant input to the correction circuit and input a constant voltage to the servo amplifier. By this means, it is possible to replace the expensive conventional special microsin. Hereinafter, the present invention will be explained based on the drawings. Third
The figure shows an embodiment of the present invention. FIG. 3a is an explanatory diagram of the direction detector of the present invention. Components that are the same as those in FIGS. 1 and 2 are given the same reference numerals. In the microsyn type azimuth detector 23 , the stator 1 is fixed to the azimuth follower ring 17 via the vertical shaft 24 with a pin 29, and the rotor 6 is directly connected to the compass card 19 via the central shaft 20. The rotor 1 holds a micro switch 25, and the rotor 6 is a ring-shaped part with a partially cut out angle range arranged on a gear 21, which is a rotating part that shares a central axis 20 with a compass card 19. Hold the cam 26.
FIG. 3b is a block diagram showing an embodiment of the gyro compass correction servo apparatus of the present invention. The same blocks shown in FIG. 2b are designated by the same reference numerals and their explanation will be omitted. In FIG. 3b, the microswitch 25 of the orientation detector 23 acts with a cam 26 to control a relay 27 added to the correction circuit 12, providing a constant input to the correction circuit 12 from a power supply 28, which is also provided.
A constant voltage is input to the servo amplifier 13 as its output. Next, the operation of the above-mentioned embodiment will be explained, but in FIG. 2, the same operation as that of the conventional gyro-compass correction servo device will be omitted. When the gyro compass is started in a state where the position of the rotor 6 of the direction detector 23 is significantly deviated from the tuning point of the servo operation, the micro switch 25 is actuated by the cam 26, drives the relay 27, and corrects the correction circuit 12.
A constant input is given from the power supply 28 to the servo amplifier 13, and when a constant voltage is input to the servo amplifier 13 as an output, the servo motor 14 drives and rotates the compass card 19, and the micro switch 25 cuts out a part of the cam 26. When the angle range is reached, the operation stops, the relay 27 returns to its original state, and a constant input from the power source 28 is not applied to the correction circuit 12, so that no constant voltage is input to the servo amplifier 13. Therefore, the servo motor 14 stops rotating and shifts to a servo tuning action by rotation, and thereafter the compass card 19 is driven by the tuning action. If the position of another tuning point of the direction detector 23 is selected at the position of this ring-shaped cam 25, only one tuning point can be determined in the angular range of 360 degrees. As explained above, according to the present invention, it is possible to provide a correction servo device for a gyro/compass that is more compact than the conventional one and has a lower manufacturing cost, using a direction detector that is incomparably cheaper than the conventional one.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of an ordinary Microsin, Fig. 2 is an explanatory diagram of a conventional gyro/compass correction servo device, and Fig. 3 is an explanatory diagram of an embodiment of the gyro/compass correction servo device of the present invention. It is. 1 and 16...Stator, 2, 3, 4 and 5...Pole,
6 and 18...rotor, 7...primary winding, 8...secondary winding, 11 and 23 ...azimuth detector, 12...correction circuit, 13...servo amplifier, 14...servo Motor, 15... Transmitter, 17... Direction tracking ring,
19... Compass card, 20... Central axis, 21
...Gear, 25...Micro switch, 26...
Cam, 27... Relay, 28... Power supply, 29...
pin.

Claims (1)

[Scope of utility model registration request] In a tracking control system that corrects the speed error of a gyro compass, which consists of an azimuth detector, a correction circuit, a servo amplifier, a servo motor, and a transmitter, there is a stator that is fixed to the azimuth tracking ring of the gyro and holds a micro switch. , a micro-thin type orientation consisting of a rotor that shares a central axis with the compass card and has a ring-shaped cam placed in its rotating part that stops the operation of the micro switch only in a partially cut-out angular range. A detector, and a means for inputting a constant voltage to the servo amplifier during its operation period under the control of the microswitch, and the detection function of the microsyn type direction detector can be performed by partially cutting out the detection function of the microsyn type direction detector. A correction servo device for a gyroscope compass, which is characterized in that the correction servo device is limited to a fixed angle range.