Rockets Smooth Running Body

This thesis is a part of the project "Net Exploder" .It mainly discusses ride performance of the off-road-vehicle, which equipped with a rocket emitter.First, it introduces the models of vehicles for ride performance analysis and builds up the dynamics model with ten DOFs of the cannon-vehicle system, then builds up the math model of the system with LaGrange formula-two-rank differential equation set. To analyze the system in frequency domain, the differential equation set is transformed by Fourier transform and we can get frequency response function of the system, on basis of which the expression of rating target for ride performance analysis is attained. This paper also proposes the off-road spectrum of four-wheel input.In this thesis, we establish program with MATLAB software to accept the changing rules of vertical accelerations at the center of cannon and vehicle body in frequency domain, we can also acquire the accelerations of pitch and roll of the vehicle body in frequency domain. By calculating, we can get the suspension dynamic bending deflection and the relative dynamic load of wheels, and we also optimize the position where the cannon is fixed on the body of the vehicle. Furthermore, the model is to be proved true by contrast of the simulating results and the experimental results of a certain vehicle.Finally, this paper also presents the simulation module in time domain which is established by means of SIMULINK, the simulation module of MATLAB. It simulates three battling mode of the cannon-vehicle system in time domain, which is static launching, marching and launching when march respectively.