"under close control of" is grammatically correct and commonly used in written English.
It means that someone or something is closely monitored or managed by another person or entity. Example: The company's finances were under close control of the chief financial officer, who made sure to carefully track all expenditures and investments.
War, however, does not enhance the status and standing of scientists; on the contrary, they come under the close control of the military.
Although he was democratically elected four times, and won several nationwide referendums, he closed TV and radio stations critical of him, armed a civilian militia and brought the bureaucracy under close control, detractors said.
Education was further restricted, the work of the zemstvos was hampered, and the village communes were brought under closer control in 1889 by the institution of the "land commandant" (zemsky nachalnik)—an official appointed by the Ministry of the Interior, usually a former officer or a local landowner, who interfered in all aspects of peasant affairs.
It is anticipated that this close monthly monitoring will maintain the participant's asthma under closer control during pregnancy.
He found that his relatives were generally short of food and that their lives were coming under increasingly close control.
These valves can be actuated under closed-loop-control of sensors responding to a specific biological or environmental stimulus, leading to potential applications in advanced responsive drug delivery systems.
The document urged "very close control and monitoring of operating conditions, coupled with frequent inspection" under such circumstances.
Keep cook fires, campfires, and trash fires under constant observation and close control.
Cells of the fatty tissues are ruptured in special disintegrators under close temperature control.
Later in 1997, and again in 1998, engineers went to the Patriot Hills area of Antarctica to test components and then the completed vehicle under close human control.
