Distributed measurement system based on CAN data bus

Abstract

Purpose This paper aims to describe the idea behind and design of a miniaturized distributed measurement system based on a controller area network (CAN) data bus. Design/methodology/approach The intention of the designers was to build a light and modular measurement system which can be used in remotely piloted aircraft systems and ultra-light aircraft during flight tests, as well as normal operation. The structure of this distributed measurement system is based on a CAN data bus. The CAN aerospace standard has been applied to the software as well as the hardware comprising this system. PRP-W2 software designed for PCs is an additional component of the proposed measurement system. This software supports data acquisition from a recorder unit and allows for preliminary data analysis, as well as data conversion and presentation. Findings The system, complete with a high-speed data recorder, was successfully installed on board of an MP-02 Czajka aircraft. A research experiment using the system and oriented on airframe high frequency vibration analysis is presented in the final part of this paper. Research limitations/implications This measurement system allows analysis of high-frequency vibrations occurring at selected points of the aircraft. A data set is recorded by three-axis accelerometers and gyroscopes at frequencies up to 1 kHz. Practical implications The use of a miniature and lightweight modular measurement system will, in many cases, be faster and less expensive than full-scale measurement and data acquisition systems, which often require a lengthy assembly process. The implementation of this class of lightweight flight test systems has many advantages, in particular to the operation of small aircraft. Such solutions are likely to become increasingly common in unmanned aerial vehicles and in other light aircraft in the future. Originality/value The adaptation of a distributed measuring system with a high frequency of measurements for purposes of small and miniature aircraft.

Detection of Aircraft Touchdown Using Longitudinal Acceleration and Continuous Wavelet Transformation

“…The D700 system does not allow the acquisition of acceleration. Additional, custom made, onboard equipment includes the miniature PCDL-01 recorder ( Figure 11 ) and a network of small measuring modules [ 23 ], in particular: PCDA-01 air data computer; satellite navigation receiver PCGP-01; PCIM-01 inertial measurement system. …”

“…The D700 system does not allow the acquisition of a x acceleration. Additional, custom made, onboard equipment includes the miniature PCDL-01 recorder ( Figure 11) and a network of small measuring modules [23], in particular:…”

“…• PCDA-01 air data computer; • satellite navigation receiver PCGP-01; • PCIM-01 inertial measurement system. equipment includes the miniature PCDL-01 recorder ( Figure 11) and a network of small measuring modules [23], in particular:…”

“…The markers of the current GPS time and the system time of the ground recorder (rugged mobile computer) are applied to individual video frames obtained from the video camera ( Figure 11B). This solution makes it possible to determine the characteristic phenomena occurring during the landing of an aircraft with an accuracy of up to 0.05 s. equipment includes the miniature PCDL-01 recorder ( Figure 11) and a network of small measuring modules [23], in particular:…”

In-Flight Tests of Intruder Detection Vision System

“…The avionics installed on board the MP-02 include the integrated Dynon Avionics D700 display system, which allows the registration of the required flight parameters and navigation data as well as the operating parameters of the power unit with a frequency of 4 Hz in the emergency recorder mode, and with a frequency of up to 16 Hz in the user programmed mode. The MP-02 equipment in the LOT version also includes the distributed measuring system PRP-W2 [45]. This system, in its full configuration, consists of the following elements: The modules are fully configurable, enabling the recording of flight parameters with a frequency of up to 1 kHz in the case of the PCIM-01 module.…”