Research Title:
A Research and Development for Maintenance and Performance Improvement : A Development of Closed Loop Servo Motor Controller for Hydraulic Motor replacement : Case Study of Elevation and Azimuth Angle Motion Controller of Anti-aircraft 40 mm. L70 

Research Project:
Research and Development Project for Sustaining and Enhancing Weapon System Efficiency: Development of a Closed-Loop Control System for Servo Motors to Replace Hydraulic Motors. Case Study: Control System for Elevation and Azimuth Movements of the 40 mm L70 Anti-Aircraft Gun.

Current Readiness Level of the Research:

• Technology (TRL): Level 9 – Operational use of deliverable.
• Social Readiness Level (SRL): Not specified.

Research Team:

1. Assistant Professor Dr. Chana Raksiri
   • Department of Industrial Engineering, Faculty of Engineering, Kasetsart University.
2. Assistant Professor Dr. Supasit Rodkhwan
   • Department of Mechanical Engineering, Faculty of Engineering, Kasetsart University.

Research Funding Sources (including all funding sources and amounts):

• Army Supply Co., Ltd.:
  • Cash Funding: 9,534,800 THB
  • In-kind Support: 7,000,000 THB
  • Total Budget: 16,534,800 THB

Research Period:
1 year (2017–2018).

Total Budget:
16,534,800 THB

Academic Contributions/Research Publications Related to the Award Submission:

1. Phumaret Saengram, Krittaya Pha-im, Chana Raksiri, "Numerical Solution Study Using Runge-Kutta Methods for Nonlinear Motion Equations of Projectile Trajectories," Defence Technology Academic Journal, Vol. 2, No. 5, May–August 2020.
2. Chana Raksiri, Krittaya Pha-im, Phumaret Saengram, "Development of a 3D Aircraft Flight Path Model Using Derivative Equations," Defence Technology Academic Journal, Vol. 3, No. 8, July–December 2021.

Outputs/Key Features:
The primary output is the Upgrade Kit for the 40 mm L70 Anti-Aircraft Gun, designed to align with the operational requirements of the Army and Navy’s tactical missions.

Product Features Include:

1. Digital Electric Motion Control System for gun rotation.
2. Electric Servo Motor and Motor Controller.
3. Communication Signal Box to interface with remote radar, including a fire control and target tracking program. The system supports the detection of suspicious objects via optoelectronic cameras.
4. Operation Display Panel for monitoring system status and controlling the fire control system. It supports autonomous target search, selection, and tracking via optoelectronic cameras.

Utilization of Research in the Past and Future

Past Utilization (Fiscal Years 2019–2022):
Steps in utilization include:

1. The research was approved and certified for use in the Royal Thai Army as per official document No. Tor Kor 0403/17145, dated December 11, 2019.
2. The research (innovative products and services) passed property and price verification and was included in the March 2020 Thai Innovation List, supplementary edition, Item No. 18, Code 13020008, for security-related military equipment, as per official document No. Nor 0731.2/W60, dated March 12, 2020.
3. The research was transferred for utilization through ArmySys Supply Co., Ltd., under a technology transfer agreement between Kasetsart University and ArmySys Supply Co., Ltd., signed on May 15, 2020.
4. The research was commercially expanded under a contract for repairing 19 units of the 40 mm L70 anti-aircraft gun (Phase 1), with a budget of 446,500,000 THB, covering fiscal years 2020–2022. As of the 2022 fiscal year, all deliverables specified in Contract No. 16.2563 have been delivered.

Planned Utilization (Fiscal Years 2026–2028):

1. Continuation of commercial expansion with the Royal Thai Army for repairing 19 units of the 40 mm L70 anti-aircraft gun (Phase 2) under a budget of 513,000,000 THB.
2. Expansion of commercial utilization with the Royal Thai Navy for repairing 10 units of the 40 mm L70 anti-aircraft gun under a budget of 270,000,000 THB, covering fiscal years 2026–2027.

Impact (Users, Utilization Volume, and Economic Value):
Economic Impact:

1. Reduction of costs compared to importing complete systems. The repair and restoration of the 40 mm L70 anti-aircraft gun costs 23.7 million THB per unit, compared to 35–50 million THB for imported systems.
2. Self-reliance within the country through locally developed technology, ensuring long-life service capabilities. This includes:
   • A 2-year warranty on equipment.
   • A 3-year warranty on gun maintenance.
   • Availability of spare parts within a maximum lead time of 3 months.

Research Publications:
Two research articles published:

1. "Numerical Solution Study Using Runge-Kutta Methods for Nonlinear Motion Equations of Projectile Trajectories," Defence Technology Academic Journal, Vol. 2, No. 5, May–August 2020.
2. Chana Raksiri, Krittaya Pha-im, Phumaret Saengram, "Development of a 3D Aircraft Flight Path Model Using Derivative Equations," Defence Technology Academic Journal, Vol. 3, No. 8, July–December 2021.

Supporting Documents:

1. Official document No. Tor Kor 0403/17145, dated December 11, 2019, approving the research for use in the Royal Thai Army.
2. Official document No. Nor 0731.2/W60, dated March 12, 2020, announcing the inclusion of the research in the Thai Innovation List (March 2020).
3. The technology transfer agreement between Kasetsart University, Army Supply Co., Ltd., and ArmySys Supply Co., Ltd., signed on May 15, 2020.
4. Contract No. 16.2563 for repairing 19 units of the 40 mm L70 anti-aircraft gun (Phase 1) for fiscal years 2020–2022.