1.4.3 Extension of the Model by the Seat Suspension
The extension of the two-mass suspension model, which has been discussed so far, by the seat suspension, results in a three-mass suspension model.
The added mass represents the mass of the sprung parts of the seat and the person sitting on it. Due to the negligible mass added with respect to the mass of the body, the resulting feedback to the body can be neglected. One can therefore begin with a two-mass system and add a simple oscillator.
In the following figures, this extension is achieved by superposing two different seat masses on the reference car from paragraph 1.4.2.1.