"rational control" is a correct and usable phrase in written English.
You can use it in contexts where you are describing when someone is using logical and reasoned thinking to make decisions or take action. For example: "Through rational control of their investments, the couple was able to ensure their financial security."
It's an issue for politicians whose egos are not under tight rational control — who are, come heaven or hell, passionate.
The parents of these children tended to use less rational control and relied more heavily on coercive discipline.
The perennial problem of the penis is precisely that because it is not under a man's rational control, it is taken to reveal his manly desire.
After all, a large number of factors over which we have no rational control cause each of us to be the way we are.
Philosophers from Aristotle to Gilbert Ryle have held that whether or not to employ a skill is under a person's rational control.
The Rockefeller Foundation dreamed of bringing the dangerous "psychobiology of sex" under "rational control" as part of its "Science of Man" programme.
Cole's landmark "View From Mount Holyoke" -- wild mountainside overlooking pasture, river and cultivated field -- shows how "the sublime will yield to the beautiful, chaos to order," and "the land brought under mankind's rational control".
And for the audience, the experience of watching the movie is, at its purest, a yielding of rational control, the kind of total surrender that takes will and conscious agency out of the equation.
Paul Scofield enters with grey crew-cut and peering gait: one notes at once the old man's trick of dwelling on unexpected vowels and lurching through phrases as if his voice were barely under rational control.
Is this also why lovers of extreme sport seek such bizarre thrills (snowboarding down Everest!)? Otherwise "danger" is reserved for contestants on reality shows like "Survivor" and expunged from reality itself, which we believe should be subject to rational control.
The goal of modern liberalism was the rational state, a state that completed the long-standing attempt at the rational control of nature and human life that began with Machiavelli and culminated with Hegel".
