EMC index is intelligence drives the “ bank “ that the function must span

 

Above all, cannot be equal to test a requirement at original electron component, basic already it is consensus; It is to be based on next already some electric car high pressure are compositive, wisdom driving a function also is the function that adds newly. Say so, compose is built wisdom drive particular EMC to test a system already extremely urgent. We understand first already some test case conclusion, not allow hopeful.

 

 

Wisdom the electromagnetism that drives a part fights faze ability is weak sports, minatory car function is safe

 

 

EMC checks frame basically

 

One when near future of as it happens read large force car fights the article of ” of faze ability pre-test about principle of radar of “ADAS millimeter wave and electromagnetism, was to produce a few resonance more.

 

Its check a result: When the system of millimeter wave radar that “ has field of 100 V/m perpendicular polarization in car ahead fights faze to check, car is in frequency of 20 ～ 100 MHz paragraph inside appeared the circumstance that target Che Dafan surrounds around to move, this kind of circumstance may bring about the miscarriage of justice of ADAS controller, cause the function such as ACC, AEB, FCW to execute the unusual operation of module, the travel of serious minatory car is safe. System of radar of ”“ millimeter wave fights faze experiment to check a result to show, fall by force in the field of particular strength, electromagnetism signal can violate system of millimeter wave radar, affect system and car function. ” (the experiment decorates consult ISO 11451 – 2: 2016 standards)

 

 

The spare parts of another case checks, agree basically with afore-mentioned case process conclusion: Be in especially RI (radiation fights faze) , ESD(electrostatic discharge fights faze) , CIP(transient state conducts interference rejection) respect, occurrence communication is interrupted, card pauses, damage even spare parts. Such result, can bring about car function security to be browbeaten. Where, where is this among them reason?

 

Xin Zengzhi drives component to guide, lack experience of car form a complete set

 

In project form a complete set, we encounter such phenomenon via regular meeting, a few manufacturer thought to cross attestation of TS16949 quality system, can make spare parts form a complete set to car. Actually, what this still differs is very far, on one hand, the conclusion of attestation can “ lock decides the condition ” at that time, can represent the result of later period not completely; On the other hand, the stability of domestic company technology is relative poorer, personnel change is frequent, cognitive to car project degree is not waited a moment, it is to cause a product to lack one of accounts that lose to test and verify, demarcate, function from design link. In the meantime, the electromagnetism environment that car itself place confronts also is very complex and abominable. Hardware manufacturer, need is accumulated through long-term experience and all previous of application of form a complete set drills.

 

Check fuel / electric car EMC tests commonly used level

 

Drive in intelligence before the level with spare parts particular EMC is mature, need to satisfy existing standard above all, and need from severe carry out.
 

 

 

 

 

Drive in the light of intelligence spare parts, property social estate maintains need reappraise

 

In component test, union is truckload requirement, to checking status of spare parts function, a grade differentiates A ～ E 5 grade, highest one class A is: The appearance that be measured or when all functions of the system are being disturbed, mix run normally after interference; B class asks: When sufferring interference, the appearance that be measured or all functions of the system run normally. But, or multinomial function movement is met deviate appoints an error. All functions can restore automatically to come after interference withdraws regular state, but memorial function cannot be affected; C class asks: The appearance that be measured or one of the system or multinomial function is in when sufferring interference, cannot run normally, after interference withdraws restore automatically to come whack; The distinction of D class is, after interference, also cannot work normally, need moves restoration to systematic hand.

 

If pure differentiate from grade, function of run-of-mill spare parts checks status, c class above is eligible. But drive to intelligence component, c class is unreasonable apparently and unqualified. If, when sufferring interference, the spare parts cannot work normally, face the instant character of the function such as car identifying, navigation, will naturally cause car safety accident. So, writing an experiment to plan medium requirement, should be to reach B level, or class A. In the meantime, the grade that security of combinative component function asks (ASIL) , put forward more the cause with exact essence.

 

Compositive ”EMC checks “ function, it is the test link of prep above component, indispensable

 

In impression, the EMC test system of BMW is exceedingly rigid, the EMC test of its report motor-car abides by: System of component → high pressure is compositive → is truckload. In the meantime, BMW moves car characteristic according to report, build from already method of a test, this also is to differentiate a system at fuel car.

 

We see the test system of BMW is medium, have the test link with independent system of a high pressure, my understanding is: The low pressure that itself of car of new energy resources is car of follow tradition fuel controls functional unit, and the angle from cost, development cycle, maturity, part of new energy resources is independent development. Be based on these, high-pressured system is compositive, as a whole, the independent test that finish is no wonder, the key should serve as unit of a complete function to check. But in a lot of projects, link of test of “ compositive ” is to be short of those who break. Remained a 3 report part to tear open separate test. I feel, this is half-baked test. If need is truckload,reach outstanding target, in later period, the test means of this kind of schism, let the design of the spare parts very likely, pay high cost price.

 

Make intelligence drive the EMC with particular part tests a level, extremely urgent

 

The flying development of car technology, invite functional safety problem, had been nowhere escape form. Before paragraph time and Mr. Deng Yong that are the same as lab of EMC of aid university car discuss EMC issue, the viewpoint of Mr. Deng I special approval: The design of controller of electric equipment of electron of “ future car, especially new energy resources, intelligence drives electronic spare parts, actually, it is the design ” of EMC.

 

Hold concurrently at current development condition, mention EMC certain height is caused take seriously, had jumped over earlier, want Fu Zhu to be mixed at the design in application, it is the thing of get twice the result with half the effort certainly. See EMC from another angle, if press parts of an apparatus of groovy electron report to design thinking, do not eliminate to be able to become the obstacle that intelligence drives finally.