Many armies are replacing heavy slow tracked vehicles with their lighter wheeled counterparts for their high mobility and better shoot and scoot capabilities. These features make the vehicle hard to track and target in counter-battery fire. However, when firing high caliber guns, spades (outriggers) are needed to connect the vehicle chassis to the ground, so as to transmit parts of the large firing force directly to the ground. Use of spades hinders the vehicle mobility, while elimination of them paves the way for having quicker and more mobile wheeled vehicles.
In this project funded by Singapore Technologies Kinetics (ST Kinetics) we analyzed dynamic response of a Humvee under firing recoil and proposed semi-active suspension system equipped with MR (magnetorheological) dampers, and controlled by semi-active Skyhook control policy to improve the vehicle response. We showed that semi-active MR dampers improve the system response in heave, pitch, and fore-aft motions, and firing accuracy. Our results also showed that the spades can be removed from wheeled military vehicles if precautions are taken for the tires.
- Hosseinloo, A.H., Vahdati, N. and Yap, F.F., 2012. Performance of spade-less wheeled military vehicles with passive and semi-active suspensions during mortar firing. Vehicle system dynamics, 50(10), pp.1515-1537. [PDF]
- Hosseinloo, A.H., Vahdati, N. and Yap, F.F., 2013. A Parametric Shock Analysis of Spade-Less, Lightweight, Wheeled, Military Vehicles Subjected To Cannon Firing Impact: A Feasibility Study of Spade Removal. International Journal of Acoustics and Vibration 18(4), pp 183–191. [PDF]
- Hosseinlooa, A.H., Vahdatib, N. and Yapa, F.F., 2011, March. Elimination of spades in wheeled military vehicles using MR-fluid dampers. In SPIE Smart Structures and Materials+ Nondestructive Evaluation and Health Monitoring(pp. 797715-797715). International Society for Optics and Photonics. [PDF]