Neuromorphic object localization using resistive memories and ultrasonic transducers

Real-world sensory-processing applications require compact, low-latency, and low-power computing systems. Enabled by their in-memory event-driven computing abilities, hybrid memristive-CMOS neuromorphic architectures provide an ideal hardware substrate for such tasks. To demonstrate the full potential of such systems, we propose and experimentally demonstrate an end-to-end sensory processing solution for a real-world object localization application. Drawing inspiration from the barn owl’s neuroanatomy, we developed a bio-mimetic, event-driven object localization system that couples state-of-the-art piezoelectric micromachined ultrasound transducer (pMUT) sensors to a neuromorphic resistive memories-based computational map. We present measurement results from the fabricated system comprising resistive memories-based coincidence detectors, delay line circuits, and a full-custom pMUT sensor. We use these experimental results to calibrate our system-level simulations. These simulations are then used to estimate the angular resolution and energy efficiency of the object localization model. The results reveal the potential of our approach, evaluated in orders of magnitude greater energy efficiency than a microcontroller performing the same task.

Memory Event-triggered Output Feedback Synchronization Control for Complex Dynamic Network with Bounded Distributed Delays

In this paper, the method of memory event triggering output feedback is used to study the synchronization of complex dynamic network with bounded distributed delays when the target node is known or unknown. A memory event triggering scheme is proposed to reduce the transmission of data packets and shorten the transient process, and the network transmission delay is considered. The data packet signals released in recent times are stored at the sensor side and the controller side, which are used to generate event trigger function and design memory output feedback controller. By using Lyapunov stability theory, a sufficient condition for exponentially ultimately bounded of error dynamic system is given in the form of linear matrix inequalities (LMIs). Finally, an example proves the validity and feasibility of the theoretical results.