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Description
This paper presents an extended investigation building upon a previously established compact multi-axis vibration measurement platform for the characterization of haptic actuators in consumer gamepad controllers. The system employs three MPU-6500 MEMS accelerometers interfaced to a RP2040 microcontroller via SPI, enabling synchronized tri-axial acceleration acquisition at up to 2 kHz across three spatially distributed measurement points. The platform was previously validated on controllers employing both eccentric rotating mass and voice coil actuator technologies, confirming clear differentiation of vibration profiles and the utility of RMS magnitude as an orientation-independent characterization metric. The present work extends this foundation in two directions: an investigation of thermal hysteresis effects in ERM-based controllers under sustained motor loading, and frequency-domain analysis of the acquired vibration signals using a custom Python-based spectral analysis tool supporting both automatic and manual window selection for DFT computation. Results of the thermal investigation are discussed alongside planned instrumentation improvements, while spectral analysis findings and tool capabilities are presented as a basis for further haptic feedback quantification.