Stiff Flyball Governor 2005-08-30 Dynamic simulation of a stiff flyball governor Laboratorio de Ingeniería Mecánica Manuel González Castro Manuel González Castro González Castro Manuel J. Lolo Universidad de la Coruña Laboratorio de Ingeniería Mecánica Escuela Politécnica Superior lolo@cdf.udc.es +34 981337400 Mendizabal s/n Ferrol 15403 España

This mechanism is composed by a flyball governor with the coupler rods substituted by spring-damper elements. The system is under gravity effects (9.81 N/kg acting in the negative z direction). The system properties (shown in the figure) have been adjusted to produce a stiff mechanical system.

Bricard mechanism

The analysis to be performed is a dynamic simulation with a duration of 350 s. Initially, the system is at a position determined by s = 0.5 m and α = 30º, rotating with an angular velocity ω = 2π rad/s.

The reference solution for this problem is the time-history of the s coordinate. The maximun allowed errors are 1.0E-1 (low precission) and 1.0E-3 (high precission), measured with 3500 output steps and a threshold value of 1.0E-3.

The following information is provided:

  1. Time-history of the position of the s coordinate, as text data file: A05_solution_data.txt
  2. Animation of the system, as AVI movie (first 3 s): A05_solution_movie.avi
  3. Time-history of the position of the s coordinate, as plot (first 3 s):

    Time-history of the coordinates of the s coordinate

 CPU-time spent by the software to solve the problem (in s).