6. Переведите предложения, обращая внимание на придаточные предложения, вводимые союзом “whether” – ли.

1. The error recovery system consults a database to check whether the error is known (old) or whether it is a new one (new).

2. It is necessary to decide whether this statement is true or false.

3. From the disturbances detected it was possible to judge whether the errors were internal or external.

4. There was a discussion whether this loop was to be open or closed.

5. It is important to insert (включать) at this control level the means to check whether the tasks are being carried out satisfactorily.

7. Переведите предложения, учитывая разные способы перевода глаголов "should", "would" (Приложение 2, табл. 11, 12).

1. If two sensory units indicated part missing, then it would be an operational error due to part missing. If only one sensory unit took an incorrect reading and the other sensory unit reads presence of the part, then the abnormality would be due to hardware failure in the first sensory unit of the controller.

2. Provided the fault were a recoverable error, the system would activate the built-in error recovery routines. Provided it were a hardware failure, then it would go through hardware diagnosis phase.

3. The placement of the transducer is very important and should be as close to the cutting zone as possible.

4. Feed rate should constantly be adapted to the rate of material removal.

8. Прочитайте и переведите текст. Errors

Flexible automatic assembly systems are open systems. This means that the assembly process suffers disturbances not only from internal sources, but also from external ones. There are two types of errors.

1. External errors are all the errors that occur outside the assembly process.

2. Internal errors are all the errors linked to the assembly process itself.

These two categories of errors are interrelated: external errors cause internal errors and vice versa. External errors often occur stochastically and are not as common as internal ones. They usually cause fatal errors that can only be recovered manually. Errors recovery research has concentrated mainly on internal errors, except programming errors.

Certain disturbances can generate temporary external errors without showing their source. For example, lighting disturbances can give problems to vision systems, but vary so quickly that the user might not detect such a cause. These stochastic changes of product assembly must be planned into the automatic assembly system controller so that no large amount of re-scheduling and programming are required.

The most common classification of errors is as follows: fatal errors and non-fatal errors. This means that the recovery system must “know” what type of error is going to cause a system shutdown and what can be corrected on-line. This is the highest hierarchical subdivision of errors. The assembly system must be designed to be flexible at all levels of hardware and software in such a way that errors are not created by too strict operational constraints.

In practice the error recovery system will always have to consult a database to check whether the error is known (old) or whether it is a new one (new). Fatal errors require a system shutdown.