35 results about "Rotational dynamics" patented technology

The invention provides a rotational inertia measuring method based on comparison of rotational inertia and dynamic coefficients between systems. Under the condition that the total resistance moment borne by the system and the instantaneous rotating speed in the deceleration process meet a quadratic polynomial, motion parameter data, including rotating speed-time or angular position-time or initial rotating speed-stop time data, of the system to be tested and a comparison system containing a rotational inertia standard part are obtained; fitting the data by using a corresponding function model to obtain resistance moment equivalent coefficients of the two systems; and comparing the resistance moment equivalent coefficients of the two systems to obtain the rotational inertia of the to-be-tested system. The method is simplified in measurement process, low in cost, high in applicability and particularly suitable for high-precision measurement of the rotational inertia of a system under the complex conditions of mechanical resistance, fluid viscous resistance, electromagnetic damping force and the like.