FPGA DSP Active Vibration Isolation Control

The control unit is segmented into two distinct processing paths: an FPGA-based path for time-critical control algorithms requiring high sampling rates, and a DSP-based path for non-time-critical functions such as parameter adjustment and diagnostics. This segmentation allows each component to operate at its optimal speed without compromising the other, thereby reducing overall signal run time while maintaining configuration capability.

A buffer memory is introduced as an intermediary between the DSP and the actuator interface. The buffer decouples the slower DSP processing from the faster actuator control loop, allowing the DSP to perform complex computations without introducing additional delay to the time-critical control path. This intermediary structure enables adaptability while preventing time loss.

The control algorithms are segmented into two categories based on their computational requirements and timing constraints. Time-critical algorithms with simpler computational structures are implemented in the FPGA to achieve high sampling rates, while more complex but less time-sensitive algorithms are executed by the DSP. This segmentation resolves the contradiction by matching algorithm complexity with appropriate hardware capabilities.

The patent replaces traditional software-based control algorithms running on a single digital processor with a hardware-accelerated implementation using FPGA logic circuits for time-critical functions. This substitution of mechanical/software processing with hardware processing enables significantly higher sampling rates without being constrained by software execution time.

The FPGA acts as an intermediary that combines the advantages of both analog and traditional digital control. Like analog control, the FPGA can process signals at extremely high speeds with minimal latency. Like digital control, the FPGA is programmable and can be reconfigured to adapt to different control requirements. This intermediary device eliminates the trade-off between speed and adaptability.

The patent substitutes traditional analog control circuitry with FPGA-based digital logic that operates at comparable speeds. The FPGA implements custom hardware logic that can respond to disturbances as quickly as analog systems while maintaining the configurability and adaptability of digital systems through programmable logic arrays.