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Ali Zamani

3 accepted papers

2020

Nonlinear model predictive control of hopping model using approximate step-to-step models for navigation on complex terrain

IROS 2020poster

We consider the motion planning problem of a hopper navigating a terrain comprising stepping stones while optimizing an energy metric. The most widely used approach of discrete searches (e.g., A-star) cannot handle boundary conditions (e.g., end path constraints on position, velocity). However, cont…

Cited by 7SourceScholar
2019

Feedback motion planning of legged robots by composing orbital Lyapunov functions using rapidly-exploring random trees

ICRA 2019poster

We present a sampling-based framework for feedback motion planning of legged robots. Our framework is based on switching between limit cycles at a fixed instance of motion, the Poincaré section (e.g., apex or touchdown), by finding overlaps between the regions of attraction (ROA) of two limit cycles…

Cited by 10SourceScholar
2017

Foot placement and ankle push-off control for the orbital stabilization of bipedal robots

IROS 2017poster

The main motivation of this paper is to understand the role of foot placement and ankle push-off control in stabilizing bipedal gaits. We modify the simplest walker (heavy torso, light legs) by incorporating a hip spring, a hip actuator, and a telescopic linear actuator. We consider two stability cr…

Cited by 17SourceScholar