Кривая Уатта

Кривая Уатта с параметрами k=2.1, r=2.2, c=0.6
Кривая Уатта с параметрами k=3.1, r=1.1, c=3.0
Кривая Уатта с параметрами k=1.0, r=1.4, c=1.0

Кривая Уатта (лемнискатоида) — плоская алгебраическая кривая шестого порядка, частный случай кривой скольжения. Определяется как геометрическое место точек центров отрезков одинаковой длины, расположенных концами на двух окружностях одинакового радиуса.

Кривая связана с работами Д. Уатта по паровым машинам.

Уравнения

Две окружности имеют одинаковый радиус , их центры расположены в точках . Длина отрезка составляет .

Механизм Ватта

Механизм Ватта

Точка начала координат является точкой перегиба для кривой и в этой точке имеет порядок касания 3. Если же , то кривая имеет порядок касания 5, что делает её ещё ближе к прямой. Это основной принцип, используемый в механизме Ватта.

Литература

  • А. А. Савелов. Плоские кривые. — М., 1960.
  • В. Вавилов. Шарнирные механизмы. Кривые Уатта.. — М.: Журнал Квант, N1, 1977.

Ссылки

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