CLACTON-ON-SEA, UK, July 8, 2025 – Pickering Interfaces has expanded its 41-670 (PXI) and 43-670 (PXIe) LVDT, RVDT and resolver simulator modules to support resolver simulation at speeds up to 130kRPM. This update addresses the growing need for accurate testing of servo systems in automotive, aerospace, and defense applications.
High-speed resolver simulation is critical for testing control systems in automotive, aerospace, and defense applications. These systems use resolvers with excitation frequencies up to 80 kHz to improve signal bandwidth, reduce noise sensitivity, and support dynamic response. Testing embedded software with lower-speed resolver simulations may result in reduced accuracy and missed software issues during system validation.
The updated module supports the simulation of multiple resolver pole pairs. For example, when simulating a resolver with four pole pairs, a mechanical speed of 20kRPM results in 80kRPM electrical cycles, reflecting the pole count multiplier.
“Rather than rely on FPGA approximations, our updated family of resolver simulators use actual transformers on board,” said Stephen Jenkins, simulation product manager at Pickering Interfaces. “As a result, our modules deliver precise, real-world analog signals with high-resolution angle simulation, ensuring reliable performance even at the highest speeds.”
The 41-670 (PXI) and 43-670 (PXIe) range is ideal for simulating Variable Differential Transformers (VDT), both Linear (LVDT) and Rotary (RVDT) types, as well as resolvers with simulation up to 130kRPM rotation. They have two (41/43-670-303) or four (41/43-670-301) banks, each capable of simulating the output of a single 5- or 6-wire VDT or resolver, or dual 4-wire utilizing a shared excitation signal. This allows the module to simulate up to 4 channels of 5- or 6-wire or eight.
PXI high-channel density enables the testing of multiple resolver channels in a compact footprint. And with the addition of built-in relays, the 41/43-670 can also provide short or open circuits for each channel’s inputs and outputs, reducing the need for external switching for fault insertion requirements. The programmable phase delay can also be used for simulating imperfect sensors and cabling, artificially offsetting single or multiple outputs.
Source: Pickering Interfaces
About Pickering Interfaces
Pickering Interfaces Ltd., established in 1988 and headquartered in Clacton-on-Sea, U.K., designs and manufactures modular switching and simulation products for electronic test and verification. Its product portfolio includes PXI, LXI, PCI, and USB switching modules, signal routing software, cables, and diagnostic tools used in functional test and hardware-in-the-loop (HIL) simulation. The company serves industries such as aerospace, automotive, electronics manufacturing, and defense. Pickering operates manufacturing and design facilities in the U.K. and Czech Republic, with sales and support teams located in the U.S., Germany, France, Sweden, and China. Employing over 650 people globally, Pickering reported approximately £37.3 million in revenue for fiscal 2023 and maintained stable performance in 2024. Known for offering a range of PXI modules and product support, Pickering focuses on delivering modular, reliable test solutions designed for automated verification systems.