Why choose “RVDT”?
The reason why RVDTs perfectly fit for Aircrafts
May 18, 2021
Tamagawa Seiki Co., Ltd. is a well-experienced manufacturer of RVDTs for Aircrafts.
This article discloses the essence of RVDTs; Highly Reliable, Long Life and Smaller & Lighter.
01. Special Features
The reason why RVDTs perfectly fit for Aircrafts
High Reliability
- Less number of piece parts and all metallic structure
Long Life
- Long life design enables low failure rate under harsh environment
Smaller & Lighter
- Simple structure enables downsizing, weight saving and low power consumption
02. Environmental Resistance
Comply with RTCA DO-160G & MIL-STD-810
According to DO-160G and MIL-STD-810, RVDTs have been tested and demonstrated their reliability in various kinds of environmental conditions, such as vibration, shock and temperature variation.
The key to the environmental resistance is their simple and all-metallic structure. This enables RVDTs to work for years with low failure rate and without any specific maintenance.
Environmental testing
Vibration
These tests demonstrate that the equipment complies with the applicable equipment performance standards (including durability requirements) when subjected to vibration levels specified for the appropriate installation.
(Reference: RTCA DO-160G, Section 8.0, category S)
Environmentally resistant RVDTs which are installed exposed exteriors of Aircrafts have been passed more severe testing, such as Waterproofness, Fluids Susceptibility and Icing, to verify its high reliability.
Waterproofness
These tests determine whether the equipment can withstand the effects of liquid water being sprayed or falling on the equipment or effects of condensation.
(Reference: RTCA DO-160G, Section 10.0, category S)
Fluids Susceptibility
These tests determine whether the materials used in the construction of the equipment can withstand the deleterious effects of fluid contaminants.
(Reference: RTCA DO-160G, Section 11.0, category F)
Icing
These tests determine performance characteristics for equipment that must operate when expose to icing conditions that would be encountered under conditions of rapid changes in temperature, altitude and humidity.
(Reference: RTCA DO-160G, Section 24.0, category B&C)
03. RVDT Lineup
Single RVDT
Basic RVDT which has only 1 channel
Easy to minimize and downsize
General-purpose RVDT
Data Sheet
Tandem RVDT
Dual redundant RVDT which has 2 channels on a shaft
Tandem structure simultaneously realizes space-saving and redundancy
RVDT Cluster
Geared RVDT which integrates multiple single RVDTs
Multiple redundant structure simultaneously realizes higher reliability and high level signal processing with multiple channels outputs
Number of channels can be customized - MAX 5 channels
Customizable gear ratio – the angle detection range of main shaft can be adjusted
Environmentally Resistant RVDT
Mainly used for Flight Control System which is exposed to outside of aircraft
Great combination of robustness, airtightness and weather-proofness
Better temperature characteristics which accurately works even in the wide range, -55 to 85 degree C
04. Applications
Aircraft systems need RVDTs
Aircrafts consist of various kinds of systems which use angular data as a critical information, such as Cockpit Control System (Control wheel, Throttle lever & Pedal), Flight Control System (Aileron, Rudder & Elevator) and High Lift System (Flap / Slat). For the sake of a safe flight, RVDTs work effectively in detecting angles even in a severe environmental conditions.
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OUR TECHNOLOGIES
CAN HELP YOUR DEVELOPMENT
Motor
Tamagawa provides various kinds of motors like Brushless DC Motor with Integrated Electronics & Gearbox. These Motors are used in Cockpit, High Lift System and Weather Radar, etc.
RVDT
Tamagawa RVDT provides linearly proportional voltages to the angular displacement with high reliability for vibration under extreme low/high temperature. Size 08, 10 and 11 are available in Tamagawa's RVDT series.