With the development of modern small satellite technology, short development cycles, low cost, and high reliability have become trends in the era of New Space. To achieve the above goals, an integrated centralized architecture of onboard avionics for an internet of things CubeSat was proposed, and CAN, I2C, and 1-wire buses were employed for telemetry collection and command sending. The implementation of onboard computers (OBCs) and the power conditioning and distribution unit (PCDU) was introduced based on the PC104 industrial standards. An arbitration switching strategy between the primary and backup OBCs was proposed so that the primary OBC had priority to be on duty. Over 98% of commercial off-the-shelf (COTS) parts were used to decrease costs, so a procedure for COTS part selection and a qualified method were presented for reliable application. The onboard avionics, including OBC and PCDU, were developed in six months, and the satellite has been in orbit for more than three years and still works well. The reliability of the onboard avionics developed using the philosophy of New Space is demonstrated by the three-year flight in orbit.

随着现代小卫星技术的发展，研制周期短、成本低、可靠性高已成为新空间时代的发展趋势。为了实现上述目标，提出了一种用于物联网CubeSat的机载航电集成集中式架构，并采用CAN、I2C和1-wire总线进行遥测采集和命令发送。基于PC104工业标准引入了车载计算机（OBC）和电源调节和分配单元（PCDU）的实施。提出主备OBC仲裁切换策略，使主OBC优先值班。为了降低成本，超过 98% 的商用现成 (COTS) 部件被使用，因此提出了 COTS 部件选择程序和合格方法以确保可靠的应用。包括OBC和PCDU在内的机载航电设备在六个月内开发完成，卫星已在轨运行三年多，仍然运行良好。采用新空间理念开发的机载航空电子设备的可靠性已通过三年的在轨飞行得到证明。