带宽受限的CAN总线对数量化调度策略

Scheduling strategy for logarithmic quantization under bandwidth constraints based on controller area network bus

中文关键词  CAN 现场总线  对数量化器  数据丢包  量化反馈调度

英文关键词  CAN bus  logarithmic quantization  packet loss  quantization feedback scheduling

中文摘要

      研究了使用量化技术解决控制器局域网络(CAN)总线网络控制系统的带宽受限问题. 首先, 建立了多控制回路的网络控制系统模型, 该模型综合考虑了采用对数量化器对采样信号进行量化和Bernoulli随机网络丢包过程. 并针对量化误差和数据丢包, 设计了控制器和观测器使得闭环系统指数均方稳定. 然后根据控制性能最优化要求, 设计了在带宽受限情况下的反馈网络调度器, 提出了量化反馈调度策略. 最后通过对3个独立控制回路组成的CAN总线系统进行仿真实验, 验证了此调度策略的有效性和可行性.

英文摘要

      A logarithmic quantization strategy for solving bandwidth constraint problems is discussed. A multi-loop model with logarithmic quantized sampling signals and Bernoullian random packet losses on the network is established. To deal with the quantization error and the packet loss, we develop a controller and an observer for stabilizing the multi-loop system in the exponentially mean-square sense. Moreover, a quantization scheduling strategy under bandwidth constraints is presented to optimize the control performance. Finally, the effectiveness and feasibility of the quantization scheduling strategy are tested and validated through simulations of a controller area network(CAN) bus system with three control loops.