Effect of integrated ride and cornering dynamics of a military vehicle on the weapon responses

Abstract

The present study brings out the influence of a non-linear dynamics model of military vehicle with trailing arm suspension, on the weapon dynamics responses. A 20 degrees of freedom integrated ride and cornering dynamics model has sequentially been coupled with the 7 degrees of freedom weapon dynamics model. The 20 degrees of freedom integrated model includes the bounce, pitch, roll, longitudinal, lateral and yaw motions of the sprung mass and rotational dynamics of the 14 unsprung masses. The 7 degrees of freedom weapon model comprises the coupled elevation and azimuth dynamics. The coupled weapon model includes angular rotation of the elevation drive, breech and muzzle in elevation direction, as well as, angular rotation of the azimuth drive, turret, breech and muzzle in azimuth direction. The actual physical behaviour of each of the hydro-gas trailing arm suspension units is implemented in the governing differential equations. The non-linear governing equations also incorporate the dynamic coupling between each of the axle arms and sprung mass, which is an inherent behaviour of the trailing arm suspension, unlike their equivalent vertical representation. The integrated model has been simulated for different cornering manoeuvres at specified speeds. It is observed that the sprung mass dynamics, emanating from different manoeuvres, significantly affects the coupled elevation and azimuth dynamics responses of the weapon. The weapon dynamics model coupled with the integrated ride and cornering dynamics model of the military vehicle, would be useful for implementation of a suitable robust gun control system in military vehicles.

Vibration control of a military vehicle weapon platform under the influence of integrated ride and cornering dynamics

“…Thereafter, the control forces are incorporated in the governing equations of motion (ref. equations (1), (2) and (5)) 12 for the weapon elevation dynamics. The equations of motion for the elevation dynamics with incorporated control parameters, are transformed into state space matrix domain and solved by using Matlab.…”

“…The nomenclature of various parameters which are used in the weapon elevation dynamics model, are same as described earlier. 12…”

“…11 The three dimensional vehicle dynamic responses of the military vehicle with trailing arm suspension act as inputs to the weapon elevation and azimuth dynamic models through which the weapon passive responses could be obtained. 12 A mathematical model was developed for comparing the dynamic performance of passive and active suspension systems (controlled with proportional-integral-derivative [PID] PID technique) in a quarter car model which was subjected to specified road excitation. 13 The contradictory aspects of the passive suspension system with regard to ride comfort and handling were addressed by implementing the PID controlled active suspension system.…”

“…The development methodologies for the 7 degree of freedom weapon dynamic model and 20 degree of freedom integrated ride and cornering dynamic non-linear mathematical model of a military vehicle were described in detail. 12 The present study is based on vibration control of the weapon elevation and azimuth dynamic mathematical model under influence of the 20 degree of freedom integrated ride and cornering dynamics non-linear mathematical model of a military vehicle with trailing arm suspension. The PID, LQR and Backstepping control techniques are applied in the weapon elevation and azimuth dynamic models which are subjected to random terrain excitation and cornering manoeuvres.…”

Ana muharebe tankının modellenmesi ve silah salınımlarının azaltılması için LQR kontrolör tasarımı

“…Şekil 4. Silah sistemi boyutları (Dimensions of weapon system) [11] Namlu arka kısmına ait ekseni etrafında dönme hareketi denklemi…”