Digital Servo Valve Control Against EMI and Temperature Drift

The patent replaces conventional analog electronic measurement and control devices with a digital system. A digital controller receives digital position signals from sensors (such as resolvers or variable differential transformers) and generates digital control signals that are converted to analog signals by a digital-to-analog converter to actuate the electro-hydraulic servo valve. This digital architecture provides immunity to temperature changes and electromagnetic interference while maintaining high measurement precision through digital signal processing and error correction capabilities.

The patent consolidates power requirements by replacing the analog electronic control system with a digital control system. The digital controller processes all control logic digitally and uses a single digital-to-analog converter to generate the analog control signal for the servo valve. This eliminates the need for multiple power sources required by analog components, significantly reducing power consumption while maintaining full control flexibility through software-based control algorithms and digital signal processing.

The patent eliminates electromagnetic interference by using digital control signals throughout the control architecture. The digital controller generates digital control signals that are transmitted digitally to a digital-to-analog converter, which then produces the analog signal required by the electro-hydraulic servo valve. This approach maintains continuous control capability through high-resolution digital signaling and fast conversion rates while generating minimal electromagnetic interference, as digital signals are less susceptible to noise and require less shielding.