Regulating Device for Rotation Rate Sensor
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Solution Overview
Problem
Control devices for harmonic reference variables face challenges in quickly restoring oscillators to their target amplitude after a power failure, particularly due to the limitations of existing control methods that are not optimized for rapidly changing or decaying oscillations.
Innovation Solution
A controller concept with a controller extension unit that synchronizes the harmonic command signal with the actual phase and amplitude of residual oscillations, using a Kalman filter to estimate and correct phase and amplitude, allowing for phase-synchronous amplification and rapid restoration of the oscillator to its target amplitude.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If conventional baseband control with low-pass filtering is used, then the controller structure is simple and stable, but the reaction speed to changes in deflection is limited due to bandwidth restrictions
Solution Approach 1:
The patent transforms the static baseband control approach into a dynamic bandpass control approach. The controller operates directly at the resonant frequency ω0, allowing the system to respond dynamically to oscillations without the bandwidth limitations imposed by low-pass filtering. This dynamic operation enables faster reaction speed while maintaining controlled complexity through frequency-domain optimization.
Solution Approach 2:
The patent replaces the mechanical signal processing chain (demodulator → low-pass filter → modulator) with a direct bandpass control approach. By operating in the frequency domain at the resonant frequency, the system eliminates the need for complex modulation/demodulation stages and low-pass filtering, achieving faster response with reduced structural complexity.
2Loss of time
If control is activated during the decay phase of the oscillator, then the system can handle residual oscillations, but the start-up time depends on the phase and amplitude difference between the decaying oscillation and the setpoint signal
Solution Approach 1:
The patent implements feedback mechanisms that continuously monitor the oscillator's phase and amplitude during the decay phase. This feedback enables the controller to adapt the setpoint signal's phase and amplitude to match the residual oscillation, eliminating startup time delays caused by phase and amplitude mismatches while maintaining system versatility.
Solution Approach 2:
The patent dynamically adjusts the parameters (phase and amplitude) of the setpoint signal based on the detected residual oscillation characteristics. By changing these parameters in real-time during the decay phase, the system achieves rapid synchronization and minimizes start-up time without sacrificing adaptability to different initial conditions.
3Measurement precision
If the oscillator is excited with resonant frequency and defined vibration amplitude, then the measurement precision is improved, but the control device takes longer to restore the oscillator to target amplitude after power failure
Solution Approach 1:
The patent applies preliminary action by detecting and characterizing residual oscillations during the decay phase before full control activation. This preliminary assessment of phase and amplitude allows the controller to pre-synchronize the setpoint signal, enabling rapid restoration to target amplitude after power failure while preserving the measurement precision achieved during resonant excitation.
Solution Approach 2:
The patent skips the conventional gradual restart process by directly utilizing the detected residual oscillation parameters to immediately establish the correct phase and amplitude. This rushing through of the synchronization phase significantly reduces restart time while maintaining the measurement precision that relies on resonant frequency excitation.
Data Source
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AI summary
The invention relates to a regulating device, comprising a sensor unit (170) that emits a measurement signal which maps a deflection of an oscillator (190) along an excitation direction. A regulator main unit (200) derives a control signal for an actuator unit from the measurement signal and a harmonic desired value signal, such that the actuator unit (180) counteracts a deviation of the deflection of the oscillator (190) from a desired amplitude of a harmonic resonant oscillation. If the actuator unit (180) switched off, a regulator expansion unit (600) estimates the actual phase and actual amplitude of a residual oscillation of the oscillator (190) and synchronises the harmonic desired value signal with the residual oscillation. The residual energy contained in the residual oscillation is utilised in order to achieve a defined operating state of the oscillator quickly.