CUA-Recovery: Benchmarking Error Recovery in Long-Horizon Computer-Use Agents
Error recovery in computer-use agents
A study of error recovery in long-horizon computer-use agents. I participated in the experiments.
MSc Robotics
The University of Manchester
Licheng Wang
Embedded systems and control engineering, spanning custom electronics, embedded firmware, feedback control and electromechanical integration.
Research experience in evaluating AI agents, with a focus on reliability and error recovery in long-horizon computer-use tasks.
01 Selected work
Research and engineering projects across robotics, AI and embedded systems.
Battery charging & testing
Six charging and six measurement channels
Developed STM32F103 firmware for channel scheduling, sensing and communications, and contributed to system integration. The team’s device was delivered in August 2024.
STM32F103 · ADC · LoRa · RS485 · HMI
Intelligent vehicle: embedded motion control
The team vehicle used a high-mounted, downward-facing camera to recognise picture cards on the floor, then an electromagnetic pickup arm to collect and sort them. My work covered PCB and mechanical design, RT1064 firmware, inertial navigation and steering/speed PID.
NXP RT1064 · Altium Designer · SolidWorks · PID
Project notes 18th Intelligent Car Competition · Anhui Regional Third Prize
PLC-based elevator group control
Carried out the main development of a three-elevator, ten-floor system in a three-person team, including weighted scheduling, LAD/SCL control logic and WinCC supervision.
Siemens S7-1200 · TIA Portal · LAD / SCL · WinCC
Project notes Siemens Cup · National Finals Second Prize · 41st · Top 2.71%
02 System logic
Select a project and a stage to explore my work.
Battery supervision
Six charging channels · six measurement channels
Firmware
Channel scheduling
I developed channel enable/configuration, state machines and multi-channel task scheduling in the STM32F103 firmware.
Firmware
Charge & SOC process
I implemented charging-process and SOC-calibration sequencing. The TL494 + BUCK stage provides the independent CC/CV power-regulation loop.
Acquisition
Acquire measurements
I implemented ADC acquisition and digital processing. Internal-resistance analogue signal processing uses an externally sourced module.
Integration
Data & interaction
I implemented data/command communication and LCD/HMI interaction. The C# host application and ML consistency-analysis algorithm were developed outside my responsibilities.
My focus: STM32 firmware, acquisition, communication and system integration.
Vehicle motion control
Team perception input · RT1064 navigation and control
Team contribution
Visual input
The team’s visual-recognition module supplies inputs to the vehicle system. A teammate developed the deep-learning model.
My contribution
Inertial navigation
I worked on inertial navigation and the vehicle’s motion-control logic, building the initial software framework on RT1064.
My contribution
Steering & speed PID
I implemented steering PID and motor-speed PID control as part of the vehicle’s motion-control system.
My contribution
Vehicle actuation
I integrated motion control with the vehicle hardware, designing the controller/motor-driver PCBs in Altium Designer and the mechanical structure in SolidWorks.
My focus: controller/driver PCBs, vehicle mechanics, inertial navigation and PID motion control.
Elevator group control
Three elevators · ten floors · Siemens S7-1200
Control logic
Hall & car requests
I developed the main control logic around external hall calls, in-car requests and the operating states of the three-elevator system.
Scheduling
Operating factors
The group-control strategy considers distance, direction, load and operating state when evaluating elevator assignments.
My contribution
Weighted dispatch
I implemented weighted group scheduling, peak-traffic detection and strategy switching using call/request conditions.
My contribution
PLC & supervision
I developed individual-elevator control and protection logic in LAD/SCL and the WinCC supervisory interface, with monitoring, authentication, alarms and debugging functions.
My focus: the main PLC control, weighted dispatch, WinCC supervision and system integration.
03 Skills & interests
More in my CVEmbedded systems
C · STM32 · NXP RT1064
ADC · state machines · channel scheduling
LoRa · RS485 · peripheral integration
Control & automation
PID · inertial navigation · motion control
Siemens S7-1200 · LAD / SCL
WinCC · weighted scheduling
Hardware & integration
Altium Designer · PCB design
SolidWorks · mechanical integration
System debugging and testing
Research interests
Robotics and control · AI agent evaluation and error recovery · Embedded systems integration
04 Education & recognition
The University of Manchester
MSc Robotics
Anhui University
BEng Automation
Average: 87.2/100 · Rank: 37/188 (Top 20%)
05 Contact
Interested in robotics and AI research opportunities.
I am looking to broaden my engineering background through research internships and experimental work during my MSc.