【作者】 张海宁；

【导师】 王随平；

【作者基本信息】 中南大学 ， 交通信息工程及控制， 2010， 硕士

【摘要】 深海底采矿车工作于6000米深的海底环境中,海底极稀软底质和各种扰动的存在对采矿车的行走控制起着很大的影响。设计合理的控制算法对于提高采矿车的行走性能起着关键作用,特别是当采矿车行驶于海底坡度地形时,对采矿车转向策略、转向行走控制参数的优化则更为重要。因此,针对采矿车转向控制技术的研究对于提高海底采矿车的控制精度、采矿效率以及安全作业有着重要意义。采矿车在海底斜坡上行走作业时的转向控制受诸多参数制约,我国矿区的海底海泥力学性质、采矿车海底斜坡坡度、采矿车转向方式与坡度相对关系、转向速度和角度、斜坡走向、采矿车打滑率、采矿车电液驱动装置、海底沉积物特性以及未知扰动等因素对采矿车转向过程和转向驱动方式均产生多参数耦合的作用。通过分析转向过程中采矿车与海底底质的作用力关系,建立了采矿车在海底斜坡转向的运动学模型,设计了以最优控制器为核心的转向控制系统。转向控制系统考虑了在采矿车斜坡上转向行走的打滑和扰动等因素,提高了转向过程中对轨迹跟踪的控制精度,保证了采矿车的安全行走作业。运用MATLAB/Simulink平台,给定不同转向方式的预定轨迹和斜坡坡度,对转向控制器进行了仿真研究。考虑到海底强烈的扰动和履带打滑因素,在仿真中加入了随机干扰,仿真结果验证了所设计的转向控制算法的有效性。更多还原

【Abstract】 The deep-ocean mining vehicles work in 6000m’s deep-seabed. The control precision of the vehicles have been influenced detrimentally by the proliferation of soft seabed sediments and various disturbances in the deep-sea environment. Consequently, a suitable control algorithm plays a pivotal role in improving the vehicles’performance. Especially when the vehicle mines around the deep-sea slope, the optimization of the steering strategies and parameters is dominant. Overall, it is imperative that the research on mining vehicle’s steering control technology is conducted for the sake of the control precision and mining efficiency.The mining vehicle’s turning control process is restricted by many factors while working on the deep-sea slope. For instance, the mechanical properties of deep-sea mud, grade of the slope, the relativity between turning direction and gradient, turning speed and angle, the slip rate, the electro-hydraulic drive system and other unknown disturbances all have a definite link with the mining vehicle’s parameters coupling effect during the steering course. The force relationship between the tracked vehicle and the seabed is first analyzed in this thesis. Secondly, the mining vehicle’s kinematic model is deduced as driving on the slope. Finally, the optimal steering controller is designed as a key determinant of the turning control system. Since the turning control system takes the skidding and disturbances into account, the mining vehicle’s tracking accuracy is enhanced and the driving safety on the slope is also ensured.Through the predicted trajectories and gradient under the different turning way, a simulating research on the turning controller is carried out in the MATLAB/Simulink platform. The random interference is added into the simulation on the consideration of strong disturbance in the deep sea and slip between the tracks and sediment. And the results show the validity of the algorithm.更多还原