Help Text for single acting actuator block

This block is the model of a single acting linear actuator.

The inputs to the block are:

  1. the controlled flows from the valve [m3/s]
  2. the external force acting on the actuator (a constant) [N]
  3. the force transmitted by the a second mass connected to the actuator output through a link, having a defined stiffness [N].
  4. the uncontrolled pressure acting on the second actuator chamber; it can be the supply pressureor the return pressure (the first and the second element of the output from the Accumulator block) or the atmospheric pressure (a constant)

The input 3 shall be connect to the output of a 'Stiffness & Mass' block or to a 'Ground' block if the second mass is not present..

The outputs are:

  1. the actuator position [m]
  2. the actuator speed [m/s]
  3. the pressures into the controlled actuator chamber [Pa]

See the Simulink Block Browser for more information about Simulink.