The phrase "are to control" is correct and usable in written English.
It can be used to indicate a purpose or intention regarding control in a specific context.
Example: "The new regulations are to control the emissions from factories to improve air quality."
Alternatives: "are meant to regulate" or "are intended to manage".
"Most of the regulations are to control the fact that the car's going too quick," Bernie Ecclestone told me.
Firsthand knowledge of the untrackable debris population is critical to GEO environment definition, if we are to control that environment.
The basic functions of vehicle exhaust components and systems are to control emissions, noise, and manage thermal energy.
The main functions of the bioreactor are to control the environmental conditions and the nutrient/product concentrations during the bioprocess.
There is sympathy in her depiction of all the play's characters, who cannot see how powerless they are to control their own fates.
Spain is one of only five countries in the EU which still lacks this, and it is fundamental if we are to control how public money is spent and stop its misuse.
Public Works projects such as the Big Dig have taught us all that an open money faucet is very hard to close, but essential if we are to control others who have insatiable appetites for other people's money.
The pressure drop is used to carry the slugs, and the boundaries are to control the air velocity for achieving a slug-flow along the pipeline.
The essential functional requirements (FRs) of any modern air conditioning system are: "to control the air temperature", and "to provide indoor air quality (IAQ)" to each served room.
As a medicinal herb in traditional Chinese medicine (TCM) its functions are to control convulsions, pain, headache, dizziness, vertigo, seizure, epilepsy and others.
If we are to control these two kinds of distresses effectively, it is essential that the pavement structure and road material should be designed in an integrated manner.
