基于带通波器干扰观察员的惯性参考单元的机械共振抑制技术
Tianyu Wang1, Weixiao Tuo2, Xingfei Li2
1State Key Laboratory of Precision Measurement Technology and Instruments, Tianjin University, Tianjin 300072, China.
ISA transactions
|November 16, 2024
概括
这项研究引入了一个带通波器干扰观察器,与隙波器相结合,以抑制惯性参考单位 (IRU) 的机械共振. 这种方法通过减轻低频振动来提高光电追踪系统的准确性.
科学领域:
- 控制系统工程 控制系统工程
- 机械系统动力学 机械系统动力学
- 光学工程是指光学工程.
背景情况:
- 惯性参考单位 (IRU) 对光电追踪和指向系统至关重要,以减轻干扰.
- 灵活的IRU支经常引入低频机械共振 (例如,26.6dB的36.7Hz峰值),降低了系统性能.
- 解决共振不对称性和时间变化的特征对于强大的IRU系统稳定性至关重要.
研究的目的:
- 开发和验证一种用于抑制IRU系统中的机械共振的新方法.
- 为了提高光电追踪和指向系统的稳定性,准确性和稳定性.
- 为应对不对称共振峰值和时间变化的系统参数所带来的挑战.
主要方法:
- 带通波器干扰观察器 (BPF-DOB) 与口波器的集成.
- 机械共振特征的实验识别.
- 对拟议的控制策略进行模拟和实验验证.
主要成果:
- 结合的BPF-DOB和隙过器有效地抑制了机械共振.
- 为IRU系统实现了1.09μrad的稳定性准确性.
- 与传统方法相比,其准确度提高了9.9%.
- 对时间变化的共振特征表现出高强度.
结论:
- 拟议的BPF-DOB和隙过器组合是缓解IRU系统中的机械共振的有效策略.
- 该方法显著提高了光电追踪和指向系统的稳定性,准确性和稳定性.
- 这种方法为经历不对称和时间变异共振的系统提供了可靠的解决方案.
相关概念视频
Concept of Resonance and its Characteristics
5.0K
If a driven oscillator needs to resonate at a specific frequency, then very light damping is required. An example of light damping includes playing piano strings and many other musical instruments. Conversely, to achieve small-amplitude oscillations as in a car's suspension system, heavy damping is required. Heavy damping reduces the amplitude, but the tradeoff is that the system responds at more frequencies. Speed bumps and gravel roads prove that even a car's suspension system is not...
5.0K
Bandpass Sampling
162
In signal processing, bandpass sampling is an effective technique for sampling signals that have most of their energy concentrated within a narrow frequency band. This type of signal is known as a bandpass signal. The key principle of bandpass sampling involves sampling the signal at a rate that is greater than twice the signal's bandwidth to prevent aliasing.
A bandpass signal has a spectrum with a lower frequency limit, denoted as ω1, and an upper frequency limit, denoted as ω2....
A bandpass signal has a spectrum with a lower frequency limit, denoted as ω1, and an upper frequency limit, denoted as ω2....
162
Active Filters
786
Active filters are electronic circuits that use operational amplifiers (op-amps), resistors, and capacitors to filter out unwanted frequency components from a signal. A first-order low-pass active filter is designed to pass signals with a frequency lower than a certain cutoff frequency and attenuate frequencies higher than that cutoff frequency. The transfer function for a first-order low-pass active filter is:
786
Passive Filters
521
Passive filters are utilized to shape the frequency spectrum of signals across a diverse array of applications. These filters, using only passive elements like resistors (R), inductors (L), and capacitors (C), are capable of selectively allowing or blocking certain frequency ranges without the need for external power sources.
Low-Pass Filters
Low-pass filters are designed to transmit signals with frequencies lower than the cutoff frequency, ωc, and attenuate those above it. The cutoff...
Low-Pass Filters
Low-pass filters are designed to transmit signals with frequencies lower than the cutoff frequency, ωc, and attenuate those above it. The cutoff...
521
Second Order systems II
90
In an underdamped second-order system, where the damping ratio ζ is between 0 and 1, a unit-step input results in a transfer function that, when transformed using the inverse Laplace method, reveals the output response. The output exhibits a damped sinusoidal oscillation, and the difference between the input and output is termed the error signal. This error signal also demonstrates damped oscillatory behavior. Eventually, as the system reaches a steady state, the error diminishes to zero.
90
Design Example: Underdamped Parallel RLC Circuit
266
Consider designing an oscillator circuit, a crucial component in various electronic devices and systems. The objective is to create an oscillator circuit with specific characteristics: a damped natural frequency of 4 kHz and a damping factor of 4 radians per second. To accomplish this, a parallel RLC circuit is employed, known for its ability to sustain oscillations at a resonant frequency. In this case, the damping factor is pivotal in achieving the desired performance.
Starting with a fixed...
Starting with a fixed...
266


