Research and Development of Active Vibration Controller Based on Shared Memory Technology
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摘要: 船舶动力装置的泵和管道的振动通过基座或支撑传递给主体，会带来严重的安全隐患。控制器是有源振动控制系统的核心，针对传统控制器存在的不足，提出基于共享内存技术研制有源振动控制器，其模数转换（A/D）采集模块和数模转换（D/A）输出模块均含微控制单元（MCU），现场可编辑逻辑门阵列（FPGA）、数字信号处理（DSP）和MCU实时向共享内存读写数据，共享内存采用超级块和数据块的构架；同时验证控制器的最大采样频率和系统延迟误差等重要指标，并在模拟台架上开展误差通道辨识试验。结果表明，研制的控制器满足低频线谱控制要求，同时提升了数据传输效率，保证系统实时性。Abstract: The vibration of the pump and pipeline of marine power plant is transmitted to the main body through the base or the support, which results in serious troubles. The controller is the core of the active vibration control (AVC) system. Aiming at the shortcomings of the traditional controller, an active vibration controller based on shared memory technology is proposed. Both analog-to-digital (A/D) conversion acquisition module and digital-to-analog (D/A) output module contain micro-control units (MCU). Field programmable gate array (FPGA), digital signal processing (DSP) and MCU in real time read data from or write data to the shared memory which is structured in superblocks and data blocks. At the same time, the maximum sampling frequency and the system delay error of the controller are verified, and the error channel identification test is carried out on the simulation bench. The results show that the controller can meet the requirements of low frequency line spectrum control, improve the data transmission efficiency, and ensure the real-time performance of the system.
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Key words:
- Active vibration controller /
- Shared memory /
- Line-spectrum control
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