Method for setting parameters in temperature cycle and passing subsequent high and low temperature tests at one time

Abstract

The invention relates to a method for setting parameters in a temperature cycle and passing subsequent high and low temperature tests at a time, and belongs to the field of position marker inspection. Comprising the following steps: testing all items in normal temperature, random vibration, impact with index requirements and vibration to ensure that indexes are met; all items are tested after the low temperature of the first cycle of the temperature cycle is stable, and it is ensured that the index requirements are met; after the low temperature of the second cycle of the temperature cycle is stable, it is verified that index requirements are met, slight oscillation, index deterioration and non-uniform distribution of high and low temperatures of zero drift of the gyroscope disappear, otherwise, fine adjustment is conducted according to the polarity of deviation until the problems are solved, and modified test data are recorded; after the high temperature is stable, it is verified that index requirements are met, slight oscillation, index deterioration and non-uniform distribution of high and low temperatures of zero drift of the gyroscope disappear, otherwise, fine adjustment is conducted according to the polarity of deviation until the problems are solved, and modified test data are recorded. The method is simple and easy to implement, iterates step by step and is easy to converge.

Description

Technical Field

[0001] The invention belongs to the field of position calibration device verification, and specifically relates to a method for setting parameters in a temperature cycle and passing subsequent high and low temperature tests at one time. Background Art

[0002] As the servo system of the antenna (and other sensors), the position marker is widely used in the seeker. The working environment is relatively harsh, so it needs to undergo more inspection tests, such as normal temperature, random vibration, shock vibration with index requirements, temperature cycle, high and low temperature, high and low temperature and then normal temperature, and some also need life tests. After passing these tests, the position marker can be delivered to the overall unit for use.

[0003] Because there are many tests, the participants are required to organize carefully and pass the tests smoothly. If there is a problem in any link, the test will fail and the cause will be found and the test will be repeated. For example, the impact vibration test with index requirements often shakes off the parts that are not tightened in place, causing the test to be suspended and restarted after tightening. In addition, in the high and low temperature tests after the temperature cycle, not only the high and low temperature of the gyro zero drift often tends to deteriorate and become seriously uneven, but also the mechanical links have slight oscillations and index deterioration due to stress changes caused by temperature changes. This situation can also be avoided by adjusting the corresponding parameters in the temperature cycle in the subsequent high and low temperature links.

[0004] People are merely satisfied with taking the usual approach in the temperature cycle, requiring only that the product can withstand temperature shocks and have functionality without looking at accuracy, and then specifically solving the exposure problem at high and low temperatures. Still no one uses the temperature conditions that are basically the same between the two links, but with different heating and cooling rates, to test the corresponding parameters in advance in the temperature cycle test, which undoubtedly affects the inspection speed.

[0005] At the same time, searching related literature did not provide any useful inspiration in this regard. Summary of the invention

[0006] The technical problems to be solved by the present invention are:

[0007] The high and low temperature tests after the temperature cycle had problems such as slight oscillation and index deterioration, similar to the gyroscope drift becoming worse. People did not use the same temperature conditions to pre-adjust the corresponding parameters to avoid the occurrence of problems.

[0008] Based on the above shortcomings, the present invention proposes a method for adjusting the parameters involved in the high and low temperature tests during the temperature cycle and passing the subsequent high and low temperature tests at one time.

[0009] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0010] A method for setting parameters during a temperature cycle and passing subsequent high and low temperature tests in one go, characterized by the following steps:

[0011] Step 1: Test all items at room temperature, random vibration, shock and vibration with index requirements to ensure that the indicators are met;

[0012] Step 2: Test all items at low temperature in the first cycle of temperature cycle after the temperature stabilizes to ensure that the index requirements are met. If there is slight oscillation and the index deteriorates, reduce the gain by 5-10% to eliminate the problem; record the zero drift data of the two-axis gyroscope of the low-temperature position marker; test all items at high temperature after the temperature stabilizes to ensure that the index requirements are met. If there is slight oscillation and the index deteriorates, reduce the gain by 5-10% to eliminate the problem and record the corresponding test data. Otherwise, record the zero drift data of the two-axis gyroscope of the high-temperature position marker, and combine the low-temperature and high-temperature gyroscope zero drift data to check whether the high and low temperature balance and the optimal effect at normal temperature are achieved. If not, calibrate (compensate) the zero position of the position marker gyroscope to achieve high and low temperature balance and the optimal effect at normal temperature. If it is achieved, go directly to the next step;

[0013] Step 3: After the temperature is stabilized at low temperature in the second cycle of temperature cycle, verify that the index requirements are met, slight oscillation, index deterioration, uneven distribution of high and low temperatures of gyro zero drift disappear, otherwise make fine adjustments according to the polarity of deviation until these problems are solved, and record the modified test data; after the temperature is stabilized at high temperature, verify that the index requirements are met, slight oscillation, index deterioration, uneven distribution of high and low temperatures of gyro zero drift disappear, otherwise make fine adjustments according to the polarity of deviation until these problems are solved, and record the modified test data;

[0014] Step 4: After the correction and fine-tuning of the two cycles of temperature cycle, in the subsequent cycle of temperature cycle until the completion, the test data are recorded in the cooling, low temperature, heating and high temperature stages respectively to verify that the index requirements are met, and the slight oscillation, index deterioration, gyro zero drift and uneven high and low temperature distribution disappear;

[0015] Step 5: In the subsequent high and low temperature tests, save the test data of cooling, low temperature, heating and high temperature, verify that the index requirements are met, and the slight oscillation, index deterioration, gyro zero drift and uneven high and low temperature distribution disappear. Otherwise, make fine adjustments according to the polarity of deviation until these problems are resolved and record the modified test data;

[0016] Step 6: After the product returns to normal temperature, conduct a normal temperature test and record the test data to ensure that the index requirements are met.

[0017] A further technical solution of the present invention: the method for calibrating (compensating) the zero position of the gyro of the position marker described in step 2 comprises:

[0018] (1) Calibrate the zero position of the gyro of the position marker under normal temperature environment. In order to balance the zero position drift (zero drift) of the position marker under temperature cycle, high and low temperature conditions and distribute it evenly in the whole temperature range, do not calibrate the gyro zero position to no drift at all, but allow it to float within the index range of ± (10 ~ 20)%;

[0019] (2) Record the low-temperature gyro zero drift data after the temperature stabilizes in the low-temperature stage of the first cycle of the temperature cycle, and record the high-temperature gyro zero drift data after the temperature stabilizes in the high-temperature stage. At the same time, combine the low-temperature gyro zero drift data and the high-temperature gyro zero drift data to check whether the zero drift under high and low temperature conditions achieves the effect of balanced distribution in the indicator error band and the optimal effect at room temperature. If it is not achieved, correct the calibration result of the gyro zero under room temperature conditions, and record the modified high-temperature gyro zero drift data. If it is achieved, go directly to the next step;

[0020] (3) After the temperature stabilizes at the low temperature stage of the second cycle of the temperature cycle, record the low temperature gyro zero drift data to check whether the expected equilibrium state under low temperature conditions is achieved. If there is a deviation, fine-tune the calibration result corrected in step (2) according to the polarity of the deviation, and record the modified low temperature gyro zero drift data. After the temperature stabilizes at the high temperature stage, record the high temperature gyro zero drift data to continue to check whether the expected equilibrium state under high temperature conditions is achieved. If there is a deviation, fine-tune the calibration result corrected in the low temperature stage of this cycle according to the polarity of the deviation, and record the modified high temperature gyro zero drift data;

[0021] (4) After two cycles of correction and fine-tuning, in the subsequent cycles until the completion, record the gyro zero drift data at the cooling, low temperature, heating, and high temperature stages to check whether they meet the requirements of step (2);

[0022] (5) In the subsequent high and low temperature tests, save the gyro zero drift data of the corresponding temperature sections of cooling, low temperature, heating, and high temperature. When deviation occurs, fine-tune the previous calibration results according to the method introduced in step (3) to achieve the required effect of step (2);

[0023] (6) After the product returns to normal temperature, test and record the normal temperature gyro zero drift data to ensure that it meets the optimal normal temperature requirements and complete the gyro zero position calibration (compensation) of the position marker.

[0024] The beneficial effects of the present invention are:

[0025] The method provided by the present invention for setting parameters during temperature cycle and passing subsequent high and low temperature tests at one time has the following advantages:

[0026] 1. The method is simple and easy to implement, iterate step by step, and easy to converge;

[0027] 2. It does not take up extra working time of the position marker;

[0028] 3. Make full use of test conditions and give full play to the role of equipment resources;

[0029] 4. The set results are repeated in the subsequent cycles of the temperature cycle test and the high and low temperature tests, which are stable and reliable, and finally end in the normal temperature test after the high and low temperature, with full temperature balance and optimal normal temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The drawings are only for the purpose of illustrating particular embodiments and are not to be considered limiting of the present invention. Like reference symbols denote like components throughout the drawings.

[0031] Figure 1 A flow chart of a method proposed by the present invention for setting parameters in a temperature cycle and passing subsequent high and low temperature tests at one time.

[0032] Figure 2 A flow chart of a method proposed by the present invention for setting parameters in a temperature cycle and passing subsequent high and low temperature tests at one time. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0034] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchangeable where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0035] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0036] In order to enable those skilled in the art to better understand the present invention, the present invention is described in detail below in conjunction with specific embodiments.

[0037] After a period of practice, a certain type of position calibrator has summarized a method of pre-adjusting the corresponding gain during the temperature cycle, in order to solve the problems of slight oscillation and index deterioration left over from the original method in the high and low temperature stages, thereby improving the inspection efficiency.

[0038] The embodiment of the present invention provides a method for setting parameters in a temperature cycle and passing subsequent high and low temperature tests at one time, such as Figure 2 As shown, the specific steps are as follows:

[0039] (1) Test all items at room temperature, random vibration, shock and vibration with index requirements to ensure that the indicators are met;

[0040] (2) Test all items at the low temperature of the first cycle of the temperature cycle at -50 to 60°C after the temperature stabilizes to ensure that the index requirements are met. If there is slight oscillation or index deterioration, reduce the gain by 5 to 10% to eliminate the problem; record the zero drift data of the two-axis gyroscope of the low-temperature position marker; test all items at the high temperature after the temperature stabilizes to ensure that the index requirements are met. If there is slight oscillation or index deterioration, reduce the gain by 5 to 10% to eliminate the problem and record the corresponding test data; otherwise, record the zero drift data of the two-axis gyroscope of the high-temperature position marker, and combine the low-temperature and high-temperature gyroscope zero drift data to check whether the high and low temperature balance and the optimal effect at normal temperature are achieved. If not, calibrate (compensate) the zero position of the position marker gyroscope to achieve the high and low temperature balance and the optimal effect at normal temperature. If it is achieved, go directly to the next step;

[0041] Among them, the calibration (compensation) of the gyro zero position of the position marker is as follows:

[0042] 1) Calibrate the zero position of the gyro of the position marker under normal temperature environment. In order to balance the zero drift (zero drift) of the position marker under temperature cycle, high and low temperature conditions in the whole temperature range, do not calibrate the gyro zero position to no drift at all, but allow it to float within the index range of ±20%;

[0043] 2) In the low temperature stage of the first cycle of the temperature cycle at -50-60℃, record the low temperature gyro zero drift data after the temperature is stable, and in the high temperature stage, record the high temperature gyro zero drift data after the temperature is stable. At the same time, the low temperature gyro zero drift data and the high temperature gyro zero drift data are integrated to check whether the zero drift under high and low temperature conditions can achieve the effect of balanced distribution in the index error band and the optimal effect at room temperature. If it is not achieved, correct the calibration result of the gyro zero under room temperature conditions, and record the modified high temperature gyro zero drift data. If it is achieved, go directly to the next step;

[0044] 3) In the low temperature stage of the second cycle of the temperature cycle, after the temperature is stable, record the low temperature gyro zero drift data to check whether the expected equilibrium state under low temperature conditions is achieved. If there is a deviation, fine-tune the calibration result corrected in step 2) according to the polarity of the deviation, and record the modified low temperature gyro zero drift data. In the high temperature stage, after the temperature is stable, record the high temperature gyro zero drift data, and continue to check whether the expected equilibrium state under high temperature conditions is achieved. If there is a deviation, fine-tune the calibration result corrected in the low temperature stage of this cycle according to the polarity of the deviation, and record the modified high temperature gyro zero drift data;

[0045] 4) After the correction and fine-tuning of the two cycles of temperature cycle, in the subsequent cycles until the completion, record the gyro zero drift data in the cooling, low temperature, heating and high temperature stages respectively to check whether they meet the requirements of step 2);

[0046] 5) In the -50~60℃ high and low temperature test, save the gyro zero drift data of the corresponding temperature sections of cooling, low temperature, heating and high temperature. When deviation occurs, fine-tune the previous calibration results according to the method introduced in step 3) to achieve the required effect of step 2);

[0047] 6) After the product returns to normal temperature, test and record the normal temperature gyro zero drift data, check to ensure that it meets the optimal normal temperature requirements, and complete the position marker gyro zero position calibration (compensation).

[0048] (3) After the temperature stabilizes at low temperature in the second cycle of the temperature cycle, verify that the index requirements are met, and slight oscillation, index deterioration, and uneven distribution of high and low temperatures of the gyro zero drift disappear. Otherwise, make fine adjustments according to the polarity of the deviation until these problems are resolved, and record the modified test data. After the temperature stabilizes at high temperature, verify that the index requirements are met, and slight oscillation, index deterioration, and uneven distribution of high and low temperatures of the gyro zero drift disappear. Otherwise, make fine adjustments according to the polarity of the deviation until these problems are resolved, and record the modified test data;

[0049] (4) After correction and fine-tuning of two cycles of temperature cycle, in the subsequent cycle of temperature cycle until the completion, record the test data in the cooling, low temperature, heating and high temperature stages respectively to verify that the index requirements are met, and slight oscillation, index deterioration, and uneven distribution of gyro zero drift at high and low temperatures disappear;

[0050] (5) In the subsequent -50 to 60°C high and low temperature tests, save the test data of cooling, low temperature, heating, and high temperature to verify that the index requirements are met, and the slight oscillation, index deterioration, and uneven distribution of gyro zero drift and high and low temperatures disappear. Otherwise, make fine adjustments according to the polarity of the deviation until these problems are resolved, and record the modified test data;

[0051] (6) After the product returns to normal temperature, conduct a normal temperature test and record the test data to ensure that the index requirements are met.

[0052] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and these modifications or substitutions should be included in the protection scope of the present invention.

Claims

1. A method for setting parameters in a temperature cycle and passing subsequent high and low temperature tests in one go, characterized in that Here are the steps: Step 1: Test all items at room temperature, random vibration, shock and vibration with index requirements to ensure that the indicators are met; Step 2: Test all items at low temperature in the first cycle of temperature cycle after the temperature stabilizes to ensure that the index requirements are met. If there is slight oscillation and the index deteriorates, reduce the gain by 5-10% to eliminate the problem; record the zero drift data of the two-axis gyroscope of the low-temperature position marker; test all items at high temperature after the temperature stabilizes to ensure that the index requirements are met. If there is slight oscillation and the index deteriorates, reduce the gain by 5-10% to eliminate the problem and record the corresponding test data. Otherwise, record the zero drift data of the two-axis gyroscope of the high-temperature position marker, and combine the low-temperature and high-temperature gyroscope zero drift data to check whether the high and low temperature balance and the optimal effect at normal temperature are achieved. If not, calibrate (compensate) the zero position of the position marker gyroscope to achieve high and low temperature balance and the optimal effect at normal temperature. If it is achieved, go directly to the next step; Step 3: After the temperature is stabilized at low temperature in the second cycle of temperature cycle, verify that the index requirements are met, slight oscillation, index deterioration, uneven distribution of high and low temperatures of gyro zero drift disappear, otherwise make fine adjustments according to the polarity of deviation until these problems are solved, and record the modified test data; after the temperature is stabilized at high temperature, verify that the index requirements are met, slight oscillation, index deterioration, uneven distribution of high and low temperatures of gyro zero drift disappear, otherwise make fine adjustments according to the polarity of deviation until these problems are solved, and record the modified test data; Step 4: After the correction and fine-tuning of the two cycles of temperature cycle, in the subsequent cycle of temperature cycle until the completion, the test data are recorded in the cooling, low temperature, heating and high temperature stages respectively to verify that the index requirements are met, and the slight oscillation, index deterioration, gyro zero drift and uneven high and low temperature distribution disappear; Step 5: In the subsequent high and low temperature tests, save the test data of cooling, low temperature, heating and high temperature, verify that the index requirements are met, and the slight oscillation, index deterioration, gyro zero drift and uneven high and low temperature distribution disappear. Otherwise, make fine adjustments according to the polarity of deviation until these problems are resolved and record the modified test data; Step 6: After the product returns to normal temperature, conduct a normal temperature test and record the test data to ensure that the index requirements are met.

2. A method for setting parameters in a temperature cycle and passing subsequent high and low temperature tests in one go according to claim 1, characterized in that: The method for calibrating (compensating) the gyro zero position of the position marker in step 2 includes: (1) Calibrate the zero position of the gyro of the position marker under normal temperature environment. In order to balance the zero position drift (zero drift) of the position marker under temperature cycle, high and low temperature conditions and distribute it evenly in the whole temperature range, do not calibrate the gyro zero position to no drift at all, but allow it to float within the index range of ± (10 ~ 20)%; (2) Record the low-temperature gyro zero drift data after the temperature stabilizes in the low-temperature stage of the first cycle of the temperature cycle, and record the high-temperature gyro zero drift data after the temperature stabilizes in the high-temperature stage. At the same time, combine the low-temperature gyro zero drift data and the high-temperature gyro zero drift data to check whether the zero drift under high and low temperature conditions achieves the effect of balanced distribution in the indicator error band and the optimal effect at room temperature. If it is not achieved, correct the calibration result of the gyro zero under room temperature conditions, and record the modified high-temperature gyro zero drift data. If it is achieved, go directly to the next step; (3) After the temperature stabilizes at the low temperature stage of the second cycle of the temperature cycle, record the low temperature gyro zero drift data to check whether the expected equilibrium state under low temperature conditions is achieved. If there is a deviation, fine-tune the calibration result corrected in step (2) according to the polarity of the deviation, and record the modified low temperature gyro zero drift data. After the temperature stabilizes at the high temperature stage, record the high temperature gyro zero drift data to continue to check whether the expected equilibrium state under high temperature conditions is achieved. If there is a deviation, fine-tune the calibration result corrected in the low temperature stage of this cycle according to the polarity of the deviation, and record the modified high temperature gyro zero drift data; (4) After two cycles of correction and fine-tuning, in the subsequent cycles until the completion, record the gyro zero drift data at the cooling, low temperature, heating, and high temperature stages to check whether they meet the requirements of step (2); (5) In the subsequent high and low temperature tests, save the gyro zero drift data of the corresponding temperature sections of cooling, low temperature, heating, and high temperature. When deviation occurs, fine-tune the previous calibration results according to the method introduced in step (3) to achieve the required effect of step (2); (6) After the product returns to normal temperature, test and record the normal temperature gyro zero drift data to ensure that it meets the optimal normal temperature requirements and complete the gyro zero position calibration (compensation) of the position marker.

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