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MIL-STD 202 Acceleration Testing

This reliability testing is performed to determine the effects of acceleration stress on the mechanical life cycle component parts. It verifies the ability of the component parts to operate properly during exposure to acceleration stress. This is stress that may be experienced in aircraft, missiles, etc.

Keystone Compliance is a military acceleration lab with significant experience in MIL-STD-202 acceleration testing. Our test engineers have expertise in military life testing and reliability life testing for commercial, military, and aerospace products. This includes knowledge of MIL-STD 202G acceleration and MIL-STD 202H acceleration. 

The following information is extremely technical in nature. It provides a summary of Method 212 acceleration as derived from the MIL-202 acceleration section. Even though the language is from MIL-202G acceleration, it applies previous versions of the standard. This includes MIL-202H acceleration.

What Machinery in the Acceleration Laboratory is Best for Method 212? 

Unless otherwise specified, the acceleration test apparatus should be the centrifuge-type. It should be capable of subjecting the test specimen to the value of acceleration (g’s) specified. The acceleration gradient across the specimen shall not exceed 15 percent of the specified g level.

How Ought Test Items Be Mounted? 

Provisions should be made to permit mounting by the normal means. This is so the item can be tested in both directions. That is, 180 degrees apart, of each of three mutually perpendicular axes, unless otherwise specified. 

Parts with axial terminations weighing less than 0.5 ounce shall be soldered to stand-off terminals. This leaves a distance of 0.2 inch to 0.3 inch from the point of emergence to the terminals. Parts weighing 0.5 ounce or more are clamped so as to avoid any stress on the leads. 

Parts having radial leads and those of unusual mass distribution are mounted as specified in the individual specification. If loading, actuating, or polarizing currents are required, they are specified. Provisions should be made for all electrical connections to be secure.

How Do You Determine the Best Military Acceleration Testing Procedure? 

After it is mounted in a rigid position, the test item is subjected to one of the following test method conditions. 

Test condition A 

The item is subjected to 5 minutes acceleration of the specified “g” level. This is in both directions of each of three mutually perpendicular axes. This is for a total of 30 minutes at either 20, 50, or 100g level. The acceleration measured at any point of the component part should not exceed 15 percent of the “g” level.

Test condition B 

The item is tested for 1 minute at nominally 10,000 or 20,000g in the direction specified in the individual specification. The rate of acceleration shall be increased smoothly from zero to the specified value in no less than 20 seconds. The rate of acceleration should also be decreased smoothly to zero in no less than 20 seconds.

Test condition C

The item is subjected to the value of acceleration specified in the individual specification. This is for 10 minutes in both directions of each of three mutually perpendicular axes. The acceleration is increased smoothly from zero to the specified value in approximately 2 minutes. The acceleration is also decreased smoothly to zero in no less than 2 minutes.

Where is the Best Acceleration Lab to Get an Acceleration Certification for your Product? 

Keystone Compliance has been recognized as one of the best acceleration testing labs  in the country. Our life cycle test lab is run by expert test engineers, who will provide the best life testing for your product. Our capabilities include testing to commercial, aerospace, and military acceleration testing standards.

Are you looking for an acceleration compliance testing for your product? Talk to our experts to develop a streamlined test plan and receive a professional and affordable quote. Contact us to learn why so many manufacturers rely on Keystone Compliance for their testing services.

Looking for other MIL-STD-202 compliance tests? Click on a link below to learn more about the other test methods.