基于虚拟样机仿真的牧草收获装备参数优化(下)

Research on Optimization of Grass Harvest Equipment Using Virtual Prototyping Simulation Technology(Part Ⅱ)

为提高打捆机捡拾机构性能和效率,提出凸轮式和无凸轮式捡拾机构参数优化方法.建立了基于ADAMS平台的捡拾机构虚拟样机,仿真得到捡拾机构弹齿端的运动轨迹、漏拾区图和弹齿端速度、加速度变化曲线.结果表明,采用优化参数,可将漏拾区高度减小到10mm以下;将弹齿端最大速度和最大加速度控制在指定范围;得到现实试验难以获得的弹齿运动规律;降低了打捆机捡拾机构设计成本.

In order to improve the performance and efficiency of the pickup collector of baler,a method is put forward for optimization of parameters of cam and non-cam pickup collectors and a new digital virtual prototype is set up based on the multi-body dynamics software ADAMS.Using the parameters optimization method,simulations of movements of the spring tooth rake end were done.The displacement trajectory of the spring-finger end of the cylinder pickup collector,the missing area drawing,the velocities and the acceleration curves were achieved from the simulations.The results show that by optimizing the movement parameters the height of the missing area can be reduced to less than 10 mm and the maximum velocities and accelerations can be controlled within a proper range.The movement curves of the spring tooth are achieved which were hard to get from experiments.The design costs can be reduced and the design time shortened.