Research of a Mathematical Model of a Pneumatic Actuator with Energy Recovery

An energy-saving pneumatic drive with energy recovery is considered in the paper. Energy is recovered into some additional volume during the output link braking by counterpressure. A mathematical model of the pneumatic drive dynamic processes is considered. The output link motion equation and the dependence of pressure in the pneumatic motor chambers during the counterpressure braking are given. The initial additional volume parameters are dwelt upon. Further, the authors provide a pneumatic circuit diagram of a pneumatic drive with the recovery of braking energy into an additional volume. To ensure operating flexibility, the initial additional volume parameters can be preset. The possibility of using recovered energy when reversing the output link motion is schematically implemented. The mathematical model is investigated for stability. The Jacobi matrix of an autonomous nonlinear system of equations is constructed, the characteristic equation is obtained, and practical testing is conducted.