The Quartz Accelerometer Customized by Micro-Magic Achieves Stable Measurement and Control in Extreme High-Temperature Environments
Micro-Magic Inc recently announced that its customized AC-4 series quartz flexible accelerometer has been successfully applied to the navigation and control system of a certain type of high-speed flying vehicle, solving the problem of precise inertial measurement in severe aerodynamic heating and complex vibration environments.
When flying at high speeds, the surface of the shell of such aircraft will experience sustained high temperatures due to intense aerodynamic friction. At the same time, complex flight attitudes and engine operation will also introduce strong vibrations and impacts. Under such "thermal-vibration composite" extreme environments, ordinary inertial sensors are prone to performance degradation or even failure, leading to "loss of lock" of navigation signals. This is one of the key technical bottlenecks in the development of the entire system.
The design of the AC-4 series accelerometer is precisely aimed at addressing this challenge. The product adopts a unique high-temperature design and dual-torque structure, ensuring performance stability within the harsh temperature range of -55°C to 180°C. Its high mechanical shock resistance of up to 1000g and excellent vibration rectification error (<30μg/g²) indicators mean that it can accurately separate and measure useful acceleration signals in intense dynamic environments, rather than being overwhelmed by environmental noise.
"For high-speed aircraft, the 'brain' of the control system relies on the most 'clean' and reliable attitude and acceleration data," explained the product manager of Micro-Magic. "The AC-4's bias value as low as less than 15mg and its scale factor monthly repeatability of less than 80 ppm provide a stable and reliable input benchmark for flight control. And its bandwidth exceeding 300Hz enables rapid response to dynamic changes in the aircraft, ensuring real-time and precise control. This is the key to achieving stable flight and precise guidance."
The feedback from the customer confirms the performance of AC-4: "In our comprehensive environmental reliability test, AC-4 underwent a complete temperature-vibration-shock three-dimensional test profile. The results demonstrate that under extreme conditions of simultaneous high temperature and high-frequency vibration, its bias temperature coefficient (<50μg/℃) and scale factor temperature drift (<100ppm) are effectively controlled, and the output signal remains highly consistent and reliable. It successfully plays the role of a reliable 'sensory neuron' in the 'nervous system' of our next-generation aircraft."
The General Manager of Micro-Magic stated, "Since its launch, the AC-4 platform has demonstrated unparalleled long-term reliability in the field of petroleum drilling. Today, we are introducing this time-tested and mature product to the cutting-edge aerospace sector, where equally stringent reliability standards are required. This is not merely a shift in application scenarios but a natural extension of our core technological strengths. We are honored to provide a solid force from the basic sensing field to promote the development of hypersonic technology."
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